OBJECTIVES: Pallidal stimulation and pallidotomy are known to improve the symptoms of Parkinsons disease (PD). However, it is not known which modality produces greater benefit in patients who have already undergone unilateral pallidotomy. It is also suggested that the original pallidal surgery provides a greater benefit than subsequent pallidal surgery. The aim of this study was to analyze which modality produced greater PD symptom improvement in patients with a prior pallidotomy and whether the chronological order of the pallidal surgery influenced the size of the improvement. METHODS: Five patients who had undergone a prior unilateral pallidotomy for PD were studied. Because of ongoing Parkinsonian symptoms, all patients subsequently underwent contralateral pallidal surgery, either a further pallidotomy or pallidal stimulation. All surgeries were performed by a single functional neurosurgeon and the patients prospectively assessed and scored at routine follow-ups. Paired-sample t-tests were used to
TY - JOUR. T1 - Bilateral globus pallidus infarcts in ecstasy use. AU - De Smet, Kristof. AU - De Maeseneer, Michel. AU - Stadnik, Tadeusz. AU - Talebian, A.. AU - De Mey, Johan. PY - 2011/11/1. Y1 - 2011/11/1. N2 - A 41-year-old man was found unconscious at his home by a friend. He was immediately admitted to the hospital through the emergency department. At the emergency department he regained consciousness. He mentionned he had a few alcoholic beverages the night before but otherwise clinical history was negative. On physical examination swelling of the right orbital area was evident. Further clinical history and laboratory tests were unremarkable. CT scan of the brain showed the right periorbital swelling. Also noted was marked hypo density of the globus pallidus bilaterally. These areas of hypodensity showed no contrast enhancement. Next MRI of the brain was performed. On T2 weighted images symmetric hyperintensity of the globus pallidus was seen bilaterally. On diffusion weighted images ...
OBJECT: The object of this study was to identify a preoperative physiological index by using surface electromyography (EMG) signals that would correlate with clinical outcome in dystonic patients following bilateral pallidal stimulation. METHODS: In 14 patients with spasmodic torticollis, generalized dystonia, and myoclonic dystonia, surface EMG signals were recorded from the most affected muscle groups. Although the dystonia affected different body segments, the EMG signals in all patients could be decomposed into bursting and sustained components. Subsequently, a ratio of the EMG amplitude was calculated between the two components and then correlated with clinical outcome. Patients who experienced rapid improvement following bilateral pallidal stimulation had a significantly higher EMG ratio compared with those who did not. Furthermore, a significant correlation was found between the EMG ratio and clinical improvement during the 12-month period following pallidal stimulation. CONCLUSIONS: The authors
The medial globus pallidus (or internal globus pallidus, GPi) is one of the output nuclei of the basal ganglia (the other being the substantia nigra pars reticulata). The GABA-containing neurons send their axons to specific nuclei of the dorsal thalamus (VA and VL), to the centromedian complex and to the pedunculopontine complex.[1][2]. The efferent bundle is constituted first of the ansa and fasciculus lenticularis, then crosses the internal capsule as the Edingers comb system then arrives at the laterosuperior corner of the subthalamic nucleus and constitutes the field H2 of Forel, then H, and suddenly changes its direction to form field H1 that goes to the inferior part of the thalamus. The distribution of axonal islands is widespread in the lateral region of the thalamus. The innervation of the central region is done by collaterals.[3]. The medial globus pallidus contains GABAergic neurons, which allow for its inhibitory function. As the medial globus pallidus, along with the substantia ...
Description of disease Globus pallidus. Treatment Globus pallidus. Symptoms and causes Globus pallidus Prophylaxis Globus pallidus
Objective: To explore the role of neuronal activity in the globus pallidus internus (GPi) in the generation of tic movements.. Methods: We studied eight Tourette syndrome patients with medically intractable tics who underwent a unilateral pallidotomy for severe tics. They ranged in age from 17-24 years; disease duration was 7-19 years. Microelectrode recording was performed in the GPi. The electromyogram (EMG) was simultaneously recorded in muscle groups appropriate for the patients tics. The relationship between neuronal firing pattern and the EMG was studied.. Results: Two hundred and thirty-two neurons were recorded during tics from 8 trajectories. Of these neurons, in addition to decreased neuronal firing rate and irregular firing pattern, 105 (45%) were tic-related showing either a burst of activity or a pause in ongoing tonic activity. They could be synchronous (n=75), earlier than EMG onset (n=27), or following EMG onset (n=3). The GPi neuronal bursts preceded EMG onset with decreased ...
In the current era of functional surgery for movement disorders, deep brain stimulation (DBS) of the globus pallidus internus (GPi) is emerging as the favoured intervention for patients with dystonia. Here we report our results in 20 patients with medically intractable dystonia treated with GPi stimulation. The series comprised 14 patients with generalized dystonia and six with spasmodic torticollis. Although comparisons were limited by differences in their respective neurological rating scales, chronic DBS clearly benefited both patient groups. Data conveying the rate of change in neurological function following intervention are also presented, demonstrating the gradual but progressive and sustained nature of improvement following stimulation of the GPi in dystonic patients.
Abstract: Neurodegeneration with brain iron accumulation encompasses a heterogeneous group of rare neurodegenerative disorders that are characterized by iron accumulation in the brain. Severe generalized dystonia is frequently a prominent symptom and can be very disabling, causing gait impairment, difficulty with speech and swallowing, pain and respiratory distress. Several case reports and one case series have been published concerning therapeutic outcome of pallidal deep brain stimulation in dystonia caused by neurodegeneration with brain iron degeneration, reporting mostly favourable outcomes. However, with case studies, there may be a reporting bias towards favourable outcome. Thus, we undertook this multi-centre retrospective study to gather worldwide experiences with bilateral pallidal deep brain stimulation in patients with neurodegeneration with brain iron accumulation. A total of 16 centres contributed 23 patients with confirmed neurodegeneration with brain iron accumulation and ...
We report on the clinical efficacy of bilateral globus pallidus internus deep brain stimulation in two patients with myoclonus dystonia/essential myoclonus who lack mutations in the epsilon sarcoglycan gene. The primary outcome measures were the Burke-Fahn-Marsden Dystonia Scale motor severity and the Unified Myoclonus Rating Scale scores, and the secondary outcome measure was the 36-item Short Form Health Survey score at the last postoperative follow up. Neuronal firing rates were also calculated from microelectrode recordings.
In a patient of generalised dystonia treated with bilateral pallidal stimulation, serial surface EMGs recorded from the neck muscles during alternating head movements revealed progressive reduction in hypertonic activity and reversal of co-contraction to reciprocal contraction, which preceded clinical improvement.
The striatum is divided into the caudate nucleus and the putamen by the internal capsule, a major collection of fibers that run between the neocortex and thalamus in both directions [16]. The striatum is the main receiver of inputs to the basal ganglia from the cerebral cortex, thalamus, and brain stem. The striatums neurons project out into the globus pallidus and substantia nigra. The globus pallidus and substantia nigra give rise to the major output projections from the basal ganglia [21]. Anatomically, the globus pallidus is situated medially to the putamen and is positioned slightly laterally to the internal capsule. It is divided into an external and internal segment. The internal pallidal segment relates functionally to the pars reticulata of the substantia nigra, which lies in the midbrain on the medial side of the internal capsule [10]. The cells of the internal pallidal segment and pars reticulata use amino butyric acid GABA as a neurotransmitter, which is responsible for the ...
Distinct populations of D1- and D2-dopamine receptor expressing medium spiny neurons (D1-/D2-MSNs) comprise the nucleus accumbens, and activity in D1-MSNs promotes, while activity in D2-MSNs inhibits motivated behaviors. We used chemogenetics to extend D1-/D2-MSN cell specific regulation to cue-reinstated cocaine seeking in a mouse model of self-administration and relapse, and found that either increasing activity in D1-MSNs or decreasing activity in D2-MSNs augmented cue-induced reinstatement. Both D1- and D2-MSNs provide substantial GABAergic innervation to the ventral pallidum, and chemogenetic inhibition of ventral pallidal neurons blocked the augmented reinstatement elicited by chemogenetic regulation of either D1- or D2-MSNs. Since D1- and D2-MSNs innervate overlapping populations of ventral pallidal neurons, we next used optogenetics to examine whether changes in synaptic plasticity in D1- versus D2-MSN GABAergic synapses in the ventral pallidum could explain the differential regulation ...
OBJECTIVE: To study the functional accuracy of stereotactic targeting for the posteroventral pallidotomy (PVP), comparing targets chosen on magnetic resonance images (MRI), and fused MRI to computed tomographic (CT) images, with electrophysiologicall
As part of the basal ganglia circuitry, these anatomic locations play a critical role in the control of movement. The effects of stimulating these brain regions are indicated in the Table. Thalamic (Vim) stimulation is only effective for tremor, not for the other symptoms of Parkinsons disease. Stimulation of the globus pallidus or subthalamic nucleus, in contrast, may benefit not only tremor but also other parkinsonian symptoms such as rigidity, bradykinesia, dyskinesias, and gait problems. For most patients with Parkinsons disease, DBS of the globus pallidus or subthalamic nucleus are more appropriate choices than thalamic DBS because stimulation at these targets affects a broader range of symptoms. A recent studycompared the outcomes of 300 patients who were randomized to deep brain stimulation of either the globus pallidus interna or subthalamic nucleus (Follett et al 2010). Two years after surgery, there was no clear advantage to either location. Patients undergoing subthalamic ...
The objective of this study was to explore the functional anatomy of the globus pallidus internus (GPi) by studying the effects of unilateral pallidotomy on parkinsonian off signs and levodopa-induced dyskinesias (LID), We found significant positive! correlations between the preoperative levodopa responsiveness of motor signs and the levodopa responsiveness of scores in timed tests (Core Assessment Program for Intracerebral Transplantations) in the contralateral limbs and the improvement in these scores after surgery, whereas there was no correlation with the improvement in LID, We also found a highly significant correlation (P , 0,0001, p = 0.8) between the volume of the ventral lesion in the GPi and the improvement in LID in the contralateral limbs, whereas there was no correlation between the ventral volume and the improvement in parkinsonian off signs. The volumes of the total Lesion cylinder and the dorsal lesion did not correlate with the outcome of either dyskinesias or parkinsonian ...
Olga Waln and Joseph Jankovic Bilateral globus pallidus internus deep brain stimulation after bilateral pallidotomy in a patient with generalized early-onset primary dystonia Movement Disorders 28. Version of Record online: 11 APR 2013 , DOI: 10.1002/mds.25456. Complete the form below and we will send an e-mail message containing a link to the selected article on your behalf. Required = Required Field. ...
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The authors report the postoperative magnetic resonance (MR) imaging findings in 36 patients with advanced Parkinsons disease who underwent unilateral microelectrode-guided posteroventral pallidotomy. The lesions were placed within 1 mm of the ventral border of the globus pallidus internus (GPi) to include pallidothalamic outflow pathways. Sequential MR studies were obtained within 1 to 3 days postoperatively and at 6-month follow-up examination. Thirty-four (94%) of the 36 patients enjoyed sustained moderate or marked improvement of their parkinsonian symptoms 6 months postoperatively. Transient side effects occurred in five patients (14%), but there were no persistent complications. The pallidal radiofrequency lesions were prolate spheroid-shaped and were composed of three concentric zones in the early postoperative studies. The mean volume of the middle zone, corresponding to the area of hemorrhagic coagulation necrosis, was 44.4 +/- 17.6 mm3; the mean lesion volume as defined by the outer ...
The globus pallidus (Latin for pale globe) also known as paleostriatum, is a sub-cortical structure of the brain. It is part of the telencephalon, but retains close functional ties with the subthalamus - both of which are part of the extrapyramidal motor system. The globus pallidus is a major component of the basal ganglia core along with the striatum and its direct target, the substantia nigra. The latter are made up of similar neuronal elements, have similar afferents from the dorsal striatum, and have a similar synaptology; neither receives cortical afferents.. Function. The globus pallidus is a structure in the brain involved in the regulation of voluntary movement. It is part of the basal ganglia, which, among many other things, regulate movements that occur on the subconscious level. If the globus pallidus is damaged, it can cause movement disorders, as its regulatory function will be impaired. There may be cases in which damage is deliberately induced, as in a procedure known as a ...
Two major neurological disorders - Parkinsons disease and dystonia - are believed to involve pathology in the activity of the basal ganglia, a subcortical brain structure, whose output nuclei (internal Globus Pallidus, GPi) projects to thalamus and modulates thalamocortical relay. While these disorders may ultimately involve different network and cellular pathologies, some pathological physiology may be shared between them because surgical treatment of both conditions includes surgical lesion or electrical stimulation to GPi (pallidotomy and GPi DBS). This work compares the thalamocortical relay responses to inhibitory inputs from internal segment of GPi in Parkinsons disease and in dystonia. ...
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This work examined the electrophysiological correlates of chorea induced by bicuculline microinjection into the GPe. The behavioral effects in the present study are in line with those described earlier (Grabli et al. 2004), showing a direct relationship between the location of injections in the GPe and the induced abnormal hyperbehavioral symptoms. Bicuculline caused a marked increase in the firing rate of GPe neurons, which was associated with drastic changes in firing pattern. In some bicuculline-affected GPe neurons, pauses became more pronounced (BHF), whereas in others they were almost completely abolished (CHF). These abnormal activity patterns were associated with a reduction in the information capacity of neurons. Bicuculline also induced regularity in both the spiking and bursting activity in the GPe. However, there was very little correlated activity in the GPe either in the temporal or in the spectral domains. There were no gross changes in the activity of GPi neurons after GPe ...
Pathophysiology of Parkinsons disease (PD) is characterized by increased firing rates of cells in the basal ganglia, a tendency toward bursting and abnormal synchronization in cells of subthalamic nucleus (STN) and globus pallidus pars externa (GPe) [1]. In advanced PD, deep brain stimulation (DBS) can be used to disrupt this pathological activity. The standard protocol for DBS is continuous high frequency stimulation of target cells, such as STN. It has been proposed that short-duration stimulation protocols may also disrupt the pathological activity [2]. The mechanism underlying this protocol is supposedly synaptic plasticity. The goal of this study is to investigate, with a biophysically plausible model, the role of synaptic plasticity in stabilizing firing patterns in the basal ganglia. ...
In this study, we found that differential axonal projections and apical tuft structures segregate corticostriatal cells into two types, with CCS cells further differentiated according to their depth-dependent differences in dendritic morphology. This suggests that corticostriatal neurons are heterogeneous according to their extracortical target and the laminar location. Similarly, in the striatum, projection cells are heterogeneous from two independent points of view: the extrastriatal target and intrastriatal location.. In terms of extrastriatal targets, they are divided mainly into two groups (Gerfen and Young, 1988; Kawaguchi et al., 1990; Parent et al., 1995). These two types are considered to affect basal ganglia outputs in opposite ways (Albin et al., 1989; Alexander and Crutcher, 1990). One group exclusively projects to the external pallidal segment (GPe-exclusive cells; indirect pathway), whereas another group, while sending axon collaterals to the external pallidal segment, directly ...
Udall Center of Excellence in Parkinsons Research (Project 2). Sponsor: NIH. Project Description: Over the past few years there has been a resurgence of interest in using the internal segment of the globus pallidus (GPi) as the target for deep brain stimulation (DBS). Yet, despite increased consideration of the pallidum as a target, surprisingly little is known about the neurophysiological characteristics of resting and movement-related activity across the pallidum (from the ventral GPi to the external segment of the pallidum, GPe) or the optimal site and frequency of stimulation required to produce the therapeutics effects. The goal of this project is to gain a greater understanding of the mechanisms, locations and pathways mediating the effects (both adverse and beneficial) of pallidal DBS on clinical and quantitative measures of motor function, including speech.. The experiments will be conducted in individuals with chronically implanted stimulators in the pallidum. A subset of subjects will ...
Deep brain stimulation (DBS) is a type of brain surgery used to treat dystonia. During surgery, two small holes will be drilled into your skull.. The surgeon will pass electrodes through each hole and position them in a part of the basal ganglia called the globus pallidus. The basal ganglia is part of the brain that affects muscle movement.. The electrodes will be connected to a small pulse generator thats similar to a pacemaker. It will be implanted under your skin, usually on your chest or lower abdomen.. The pulse generator sends signals to the globus pallidus. This alters nerve impulses produced by the basal ganglia and improves the symptoms of dystonia.. The most common complication of DBS is that either the pulse generator stops working or the electrodes become displaced, which may require further surgery to correct.. DBS is a relatively new technique, so theres little information regarding its long-term safety or effectiveness. Therefore, before deciding to have DBS, you should discuss ...
Deep brain stimulation (DBS) is a type of brain surgery used to treat dystonia. During surgery, two small holes will be drilled into your skull.. The surgeon will pass electrodes through each hole and position them in a part of the basal ganglia called the globus pallidus. The basal ganglia is part of the brain that affects muscle movement.. The electrodes will be connected to a small pulse generator thats similar to a pacemaker. It will be implanted under your skin, usually on your chest or lower abdomen.. The pulse generator sends signals to the globus pallidus. This alters nerve impulses produced by the basal ganglia and improves the symptoms of dystonia.. The most common complication of DBS is that either the pulse generator stops working or the electrodes become displaced, which may require further surgery to correct.. DBS is a relatively new technique, so theres little information regarding its long-term safety or effectiveness. Therefore, before deciding to have DBS, you should discuss ...
Bowes E; Levy F; Lawson J; Mandalis A; Mohan A; Weickert CS, 2015, Anti-N-methyl-D-Aspartate encephalitis - a case study of symptomatic progression, Australasian Psychiatry, vol. 23, pp. 422 - 425, http://dx.doi.org/10.1177/1039856215588229. Sachdev PS; Mohan A; Taylor L; Jeste DV, 2015, DSM-5 and mental disorders in older individuals: An overview, Harvard Review of Psychiatry, vol. 23, pp. 320 - 328, http://dx.doi.org/10.1097/HRP.0000000000000090. Sachdev PS; Mohan A; Cannon E; Crawford JD; Silberstein P; Cook R; Coyne T; Silburn PA, 2014, Deep brain stimulation of the antero-medial globus pallidus interna for Tourette syndrome, PLoS ONE, vol. 9, http://dx.doi.org/10.1371/journal.pone.0104926. Mohan A; Lee T; Sachdev P, 2014, Surviving acute cyanide poisoning: a longitudinal neuropsychological investigation with interval MRI, BMJ case reports, vol. 2014, http://dx.doi.org/10.1136/bcr-2013-203025. Shiner E; Taylor L; Mohan A; Watson S; Sachdev PSI, 2014, Severe depression masquerading ...
In order to continuously support the European computing infrastructures and to exploit possible synergies, the Initiative for Globus in Europe (IGE) coordinates European Globus activities, drive forward Globus developments according to the requirements of European users, and strengthen the influence of European developers in the Globus Alliance.
So, beneath the cerebral cortex, we have deep gray matter. I want to point out to you that here is our heres our neocortex and its not very thick. You just look at that. Theres some in here, goes around and around. So, its not really thick, two three millimeters thick. Deep to this gray matter is some white matter. Well talk about that in a separate lecture. But I also want to talk about some of these other gray matter thats deep within the brain. We talked about our caudate, and our putamen, and our globus pallidus. These are parts of the basal ganglia. So, caudate, putamen, and globus pallidus. We talked about these in motor systems that the basal nuclei or basal ganglia participate in motor behaviors. Theres a separate lecture on the diencephalon which is all things thalamus. In this image, you can see the dorsal thalamus here. Up in this image we can see part of the hypothalamus here. So, the diencephalon is all things thalamus. We have a whole separate lecture on that to talk about ...
These results, Dr. Joseph Mercola commented, revealed areas of high intensity, or hyperintensity, in two brain regions (the dentate nucleus (DN) and globus pallidus (GP)), which correlated with the number of gadolinium-based enhanced MRIs. Its unknown at this time what the hyperintensity may mean, however hyperintensity in the DN is associated with multiple sclerosis. Its now being suggested that this hyperintensity may be the result of the large number of enhanced MRI scans often received by multiple sclerosis patients. Hyperintensity of the GP, meanwhile, is linked with liver dysfunction. The studys lead author noted, Hyperintensity in the dentate nucleus and globus pallidus on unenhanced MRI may be a consequence of the number of previous Gd-CM administrations… Because gadolinium has a high signal intensity in the body, our data may suggest that the toxic gadolinium component remains in the body even in patients with normal renal function. (Dr. Mercola, 2014.) ...
Iron levels in the basal ganglia steadily increase throughout development and, in two sub-regions, continue to increase into adulthood. Decreased levels of iron in the putamen was correlated with impaired cognitive performance involving reasoning and spatial processing. Findings suggest the brain requires iron for healthy cognitive development.... Read More... ...
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For air departure dates within 331 days, youll be offered a choice of carriers and flight schedules as well as price points to choose from when selecting your flights. Your schedule will be provided to you at the time of booking (schedules are subject to change by carriers). Globus offers 2 air options: Flex Air and Instant Purchase Air. Flex Air allows flexibility if you want to make changes to your vacation schedule. Instant Purchase Air may offer additional airline options but has more restrictions. Some vacations may only offer one Air type option. Guaranteed air-inclusive prices: air is only available to passengers traveling from the United States and only available when booked in conjunction with a land vacation. An additional $300 per person non-refundable air deposit is required for Flex Air booked in conjunction with any land vacation (i.e. air-inclusive vacation). Air can only be booked by Globus in conjunction with a vacation package. Instant Purchase Air requires air payment in full ...
The term basal ganglia of Carpenter refers to an alternate definition of basal ganglia based on proximity. It consists of the striatum, the globus pallidus and the amygdala ( Carpenter-1983 ). A discussion of semantic differences in use of the term basal ganglia is presented in Anthoney-1994. ...
Striatala medium spiny neuroner (MSNs) spelar en stor roll för olika motoriska och kognitiva funktioner. Beroende på huruvida dessa neuroner uttrycker dopaminreceptorer av D1- eller D2-typ, klassificeras de som tillhörande den direkta (dMSN) respektive den indirekta (iMSN) vägen genom basala ganglierna. I denna avhandling undersöker jag hur inputet från kortex till de två typerna av MSNs processas och jag karakteriserar aktiviteten från dMSNs, samt undersöker även vilken effekt avvikande iMSN aktivitet ger upphov till i det basala ganglienätverk som består av den subthalamiska kärnan (STN) och globus pallidus externa (GPe).För att verifiera resultaten från en tidigare modelleringsstudie, som predicerat att dMSNs erhåller fler eller får starkare inputs från kortex jämfört med iMSNs, analyserade jag in vivo data från MSN wholecell registreringar gjorda i nedsövda möss som antingen tillhört en kontroll-grupp (friska möss) eller en grupp där ...
Enkephalin, Ala(2)-MePhe(4)-Gly(5)-;Nucleus Accumbens;Ventral Tegmental Area;Muscimol;Dopamine;Oxidopamine;Baclofen;Microinjections;Receptors, Opioid;Receptors, GABA-A;Basal Forebrain;Globus Pallidus;Mesencephalon;Oligopeptides;Motor ...
HIPPI in neurons and neuropil throughout the brain: cortex , striatum, globus pallidus, hypothalamus and cerebellum. 55kDa by WB. Tissues (except skin) expressing HIPPI also express Hip- ...
When I just tried this, I felt anxious during the first breath and the second breath felt soothing. Thats what happens for most people. Our breath tends to be short and shallow when we feel worried, so taking long, slow breaths can help us to feel calm.. There are several more suggested breathing practices in a post at MindfulTeachers.org on Breath-Based Practices for Mindfulness or Stress Reduction. 2: Knowledge. Many youth find it helpful to understand whats going on in their brains when they have strong feelings. Theres no need to overwhelm them with a detailed description of every single part of the brain, from the medulla oblongata to the globus pallidus. But its important not to be overly simplistic, either.. Some kids are being taught that the thinking part of the brain is good and should be used to suppress the bad emotional parts, like the amygdalae. (See The Magnificent, Mysterious, Wild, Connected, and Interconnected Brain) Its more accurate to say that different parts of ...
The idea behind GRIP was to combine the advantages of the two Grid developments: the seamless access to resources of UNICORE and the wide support that already exists for Globus, says Erwin. In the first year of the project, we successfully completed our objective of making Globus resources accessible from the UNICORE interface. This was done by extending some of the components within UNICORE and without having to modify Globus in any way. We demonstrated various applications in the meteorological field and molecular science applications. Our GRIP partners in Warsaw use GRIP for bio-molecular calculations and on a regular basis. Especially for CPMD (Car-Parrinello molecular dynamics), a graphical interface for performing certain molecular computations has been developed in UNICORE that even a novice can use. The point is that users are no longer constrained to using only locally available applications. So long as UNICORE or Globus have been installed, there is no difference in the user interface ...
Compact ultrasound device for physiotherapist, masseur or home use Convenient and simple applications in the fields of health and aesthetics. The convenient design of the Globus ultrasound allows the device to be used in any area.51 programs that comb...
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Diversification of research microanatomic methods of subcortical neuron structures has led to the re- structuring of the classical concept of basal ganglia and the working out of a new anatomic concept of ventral striatopallidal system. Macroanatomic visualization and evaluation of subsystems and structures of this new system are pioneering issues in the description and topography of the basal forebrain. The authors aim - based on our macroanatomic experience - is at debating several issues associated to the progress in deciphering subcortical neuronal structures which generated dilemmas regarding their naming and evaluation. We based our study on post-mortem human biological samples, with the observation of the ethics and deontology of research. The study was carried out on four human brains free from acute or chronic lesions, that were taken from two men and two women aged between 55 and 65. They were analyzed after pre-fixation in solution 10% formaldehyde for 10 days and post-fixation in solution 5
Eschmeyer, W.N. (ed.), 2003. Catalog of fishes. Updated database version of March 2003. Catalog databases as made available to FishBase in March 2003. (Ref. 46206 ...
흰배박쥐(Antrozous pallidus)는 애기박쥐과 흰배박쥐아과에 속하는 박쥐의 일종이다. 캐나다 서부부터 멕시코 중부 지역까지 분포한다. 흰배박쥐속(Antrozous)의 유일종이다. 흰배박쥐속으로 분류되기도 하는 반겔더박쥐(Bauerus dubiaquercus)와 근연종 관계를 갖는다.[3] 흰배박쥐과(Antrozoidae)로 분류하기도 했으나 현재는 애기박쥐과에 속하는 흰배박쥐아과 또는 애기박쥐아과로 분류한다.[4] ...
Object. The authors studied the long-term efficacy of deep brain stimulation (DBS) of the posteroventral lateral globus pallidus internus up to 2 years postoperatively in patients with primary non-DYT1 generalized dystonia or choreoathetosis. The results are briefly compared with those reported for DBS in DYT1 dystonia (Oppenheim dystonia), which is caused by the DYT1 gene.. Methods. Enrollment in this prospective expanded pilot study was limited to adult patients with severely disabling, medically refractory non-DYT1 generalized dystonia or choreoathetosis. Six consecutive patients underwent follow-up examinations at defined intervals of 3 months, 1 year, and 2 years postsurgery. There were five women and one man, and their mean age at surgery was 45.5 years. Formal assessments included both the Burke-Fahn-Marsden dystonia scale and the recently developed Unified Dystonia Rating Scale. Two patients had primary generalized non-DYT1 dystonia, and four suffered from choreoathetosis secondary to ...
Primary cervical dystonia (CD) affects about 20-40/100.000 population. The disease is chronic and life-long. The therapy of choice are local intramuscular Botulinum Toxin injections given every three months. Oral medication such as anticholinergics or dopamine depleting drugs are usually of limited efficacy or their use is limited by intolerable side-effects. About 5-10% of CD patients develop neutralizing antibodies against Botulinum Toxin. Two previous controlled multicenter trials have shown the efficacy and safety of bilateral pallidal stimulation in patients with primary segmental and generalized dystonia (one study was performed by our group).. Following surgery, patients will be randomized 1:1 to verum or placebo stimulation for a period of three months. Primary outcome measure is the TWSTRS (Toronto Western Spasmodic Torticollis Rating Scale) - a validated and widely accepted physician-based outcome measure for cervical dystonia. The independent TWSTRS raters are movement disorders ...
Deep brain stimulation of the globus pallidus internus alleviates involuntary movements in patients with dystonia. However, the mechanism is still not entirely understood. One hypothesis is that deep brain stimulation suppresses abnormally enhanced synchronized oscillatory activity within the motor cortico-basal ganglia network. Here, we explore deep brain stimulation-induced modulation of pathological low frequency (4-12 Hz) pallidal activity that has been described in local field potential recordings in patients with dystonia. Therefore, local field potentials were recorded from 16 hemispheres in 12 patients undergoing deep brain stimulation for severe dystonia using a specially designed amplifier allowing simultaneous high frequency stimulation at therapeutic parameter settings and local field potential recordings. For coherence analysis electroencephalographic activity (EEG) over motor areas and electromyographic activity (EMG) from affected neck muscles were recorded before and immediately after
Recent landmark studies have demonstrated the effectiveness of STN and GPi DBS for appropriate Parkinson disease patients.{ref82} In a randomized, controlled trial of 255 patients enrolled in the Vete... more
Dystonia is a disabling condition characterised by involuntary muscle spasms and abnormal postures. Its pathophysiology is incompletely understood but most lines of evidence point to an underlying defect of basal ganglia function leading to abnormal corticomotor output. Various abnormalities have been shown, including abnormal neuronal activity in basal ganglia output nuclei, defective neural inhibition at the spinal, brainstem, cortical level and sensorimotor misprocessing. More recently, increased neural plasticity has been found in dystonia patients in response to transcranial magnetic stimulation (TMS) protocols which induce motor cortex plasticity. Excessive plasticity might contribute to dystonia by promoting or reinforcing abnormal patterns of connectivity. The most significant advance in the treatment of generalised dystonia has been the development of globus pallidus internus (GPi) deep brain stimulation (DBS). Interestingly its beneficial effects are progressive over weeks to months ...
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Neurodegeneration with brain iron accumulation encompasses a heterogeneous group of rare neurodegenerative disorders that are characterized by iron accumulation in the brain. Severe generalized dystonia is frequently a prominent symptom and can be very disabling, causing gait impairment, difficulty with speech and swallowing, pain and respiratory distress. Several case reports and one case series have been published concerning therapeutic outcome of pallidal deep brain stimulation in dystonia caused by neurodegeneration with brain iron degeneration, reporting mostly favourable outcomes. However, with case studies, there may be a reporting bias towards favourable outcome. Thus, we undertook this multi-centre retrospective study to gather worldwide experiences with bilateral pallidal deep brain stimulation in patients with neurodegeneration with brain iron accumulation. A total of 16 centres contributed 23 patients with confirmed neurodegeneration with brain iron accumulation and bilateral ...
Dystonia is a movement disorder characterized by involuntary sustained muscle contractions causing twisting and repetitive movements or abnormal postures. Some cases of primary and neurodegenerative dystonia have been associated with mutations in individual genes critical to the G1-S checkpoint pathway (THAP1, ATM, CIZ1 and TAF1). Secondary dystonia is also a relatively common clinical sign in many neurogenetic disorders. However, the contribution of structural variation in the genome to the etiopathogenesis of dystonia remains largely unexplored. Cytogenetic analyses with the Affymetrix Genome-Wide Human SNP Array 6.0 identified a chromosome 13q34 duplication in a 36 year-old female with global developmental delay, facial dysmorphism, tall stature, breast cancer and dystonia, and her neurologically-normal father. Dystonia improved with bilateral globus pallidus interna (GPi) deep brain stimulation (DBS). Genomic breakpoint analysis, quantitative PCR (qPCR) and leukocyte gene expression were used to
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We investigated the effect of pallidal deep brain stimulation (GPi-DBS) in dystonia on cognition, mood, and quality of life and also assessed if DYT1 gene status influenced cognitive outcome following GPi-DBS. Fourteen patients with primary generalized dystonia (PGD) were assessed, measuring their estimated premorbid and current IQ, memory for words and faces, and working memory, language, executive function, and sustained attention, one month before and one year or more after surgery. Changes in mood and behaviour and quality of life were also assessed.
The anterograde transport of Phaseolus vulgaris-leucoagglutinin (PHA-L) was combined with postembedding immunocytochemistry for gamma-aminobutyric acid (GABA) to study the topography, the synaptic organization and the neurotransmitter content of the pallidosubthalamic projection in the rat. After injections of PHA-L in different parts of the globus pallidus a rich plexus of anterogradely labelled fibres and terminals was found in the ipsilateral subthalamic nucleus. The immunoreactive elements were distributed according to a mediolateral and rostrocaudal topography. Injections of PHA-L restricted to the lateral two-thirds of the globus pallidus gave rise to a massive anterograde labelling confined to the lateral half of the subthalamic nucleus. On the other hand, injections of PHA-L strictly confined to the medial part of the globus pallidus resulted in anterograde labelling that occupied the ventromedial pole of the subthalamic nucleus. In some cases a few retrogradely labelled cells were found ...
Abbreviations AADC: aromatic L-amino acid decarboxylase. Aβ: amyloid β. ACh: acetylcholine. AChE: acetylcholinesterase. AD: Alzheimer disease. ALDH: aldehyde dehydrogenase. ALS: amyotrophic lateral sclerosis. apoE: apolipoprotein E. APP: amyloid precursor protein. BuChE: butyrylcholinesterase. CNS: central nervous system. COMT: catechol-O-methyltransferase. DA: dopamine. DAT: DA transporter. DβH: dopamine-β-hydroxylase. DOPAC: 3,4-dihydroxyphenylacetic acid. GABA: γ-aminobutyric acid. Glu: glutamatergic. GPe: globus pallidus extern. GPi: globus pallidus interna. HD: Huntington disease. 5HT: serotonin. HVA: homovanillic acid. MAO: monamine oxidase. MCI: mild cognitive impairment. MPTP: N-methyl-4-phenyl-1,2,3,6-tetrahydropyridine. 3MT: 3-methoxyltyramine. NE: norepinephrine. NET: NE transporter. NMDA: N-methyl-D-aspartate. 3-OMD: 3-O-methyl dopa. PD: Parkinson disease. PDD: Parkinson disease dementia. PET: positron emission tomography. PH: phenylalanine hydroxylase. REM: rapid eye ...
Patients mean age was 41 years, ranging from 28 to 49 years with a mean duration of antipsychotic exposure of 3.7 years. Patients 2 and 3 received first-generation antipsychotics and patient 1 was administered second-generation medication. Preoperatively, all patients required either assisted living or was homebound. The craniospinal regions were the most seriously affected regions and all demonstrated opisthotonus and retrocollis. Chronic rhythmic neck hyperextension movements resulted in premature cervical spondylosis, and patients 1 and 3 required nasogastric tube feeding. At the time of surgery, all were unable to walk independently. The mean preoperative BFMDRS score was 61, ranging from 44 to 80, and mean GDS score was 47, ranging from 40 to 52. There were no treatment-related complications and the procedure was well tolerated. As expected, there was no minimal response before stimulation but after pulse generator activation, marked amelioration of dystonic symptoms was observed. The ...
Recent publications have demonstrated that deep brain stimulation for Parkinsons disease still exerts beneficial effects on tremor, rigidity, and bradykinesia for up to 10 years after implantation of the stimulator. However with the progression of Parkinsons disease, features such as cognitive decline or freezing become prominent, and the presence of an implanted and functioning deep brain stimulator can impose a profound burden of care on the clinical team and family. The authors describe their experience in treating 4 patients who underwent removal of the implanted device due to either progressive dementia requiring full-time nursing or due to infection, and who subsequently underwent a unilateral pallidotomy.
We previously analyzed the arborization patterns of rat ventral pallidal (VP) axons that coursed caudally to innervate the thalamus and brainstem (Tripathi et al. in Brain Struct Funct 218:1133-1157, 2013). Here, we have reconstructed 16 previously undetected axons from the same tracer deposits that follow a more lateral trajectory. Virtually all 16 axons emanating from the different VP compartments collateralized in the extended amygdala system (EAS) and amygdaloid complex. The most frequent targets of axons from the lateral and medial (VPm) VP compartments were the rostral sublenticular extended amygdala, the extended amygdala (EA), the central nucleus of the amygdala and the posterior part of the basolateral amygdaloid nucleus. In contrast, axons from the rostral extension of the VP preferentially innervated the anterior amygdaloid area, the magnocellular preoptic nucleus, and the anterior part of the basomedial amygdaloid nucleus. We additionally found and reconstructed a single corticopetal ...
Nicotine and a fine, forceless pulse contraindications: Pregnancy western medical indications: Intestinal dryness constipation with no recurrences. And in the mesolimbic system, portal fibroblasts: Underappreciated mediators of biliary dysmotility. Sanders ma, peura da. 577 644, in a small nucleus located at the ts-5 genes influence levels of crf in the early postpartum months may have a history of severe cytopenias is of general psychiatry 37. This might induce a set of functions. Statistically, siblings have a limited role in chinese medical indications: Hysteria, neurosis, menopausal syndrome, and mesenteric lymph nodes, brain). The gene for a 30-year-old woman. John h. Martin phd editors: Martin, john h. Title: Neuroanatomy: Text and atlas, 6rd ed. Do 1. How often is induced by adult respiratory distress is the globus pallidus internus is fed by the dotted regions, (courtesy of peter r. Mcnally. ]to directly evaluate the interaction of parasite antigens (haque and capron, 1983). There were ...
Background The occurrence of Parkinsons disease (PD) is known to be associated both with increased nigrostriatal iron content and with low serum cholesterol and PD, but there has been no study to determine a potential relationship between these two factors. Methods High-resolution MRI (T1-, T2, and multiple echo T2*-weighted imaging) and fasting lipid levels were obtained from 40 patients with PD and 29 healthy controls. Iron content was estimated from mean R2* values (R2* = 1/T2*) calculated for each nigrostriatal structure including substantia nigra, caudate, putamen, and globus pallidus. This was correlated with serum cholesterol levels after controlling for age, gender, and statin use. Results In patients with PD, higher serum cholesterol levels were associated with lower iron content in the substantia nigra (R = −0.43, p = 0.011 for total-cholesterol, R = −0.31, p = 0.080 for low-density lipoprotein) and globus pallidus (R = −0.38, p = 0.028 for total-cholesterol, R = −0.27, p = 0.127
The basal ganglia are normally isodense/isointense to the cortex. Because the globus pallidus has more myelin content compared with the putamen, it usually appears slightly more hypointense on T2WI, GRE, and SWI images. Age-related calcium deposition in the globus pallidus initially results in increased T1 signal intensity and subsequently, when calcification exceeds 40%, signal loss in all sequences. Aging with consequent iron deposition in the putamen results in a gradual decrease of T2/T2*/SWI signal intensity in the putamen. This is more pronounced in the 8 or 9 decade of life.. ...
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Pupil dynamics serve as a physiological indicator of cognitive processes and arousal states of the brain across a diverse range of behavioral experiments. Pupil diameter changes reflect brain state fluctuations driven by neuromodulatory systems. Resting-state fMRI (rs-fMRI) has been used to identify global patterns of neuronal correlation with pupil diameter changes; however, the linkage between distinct brain state-dependent activation patterns of neuromodulatory nuclei with pupil dynamics remains to be explored. Here, we identified four clusters of trials with unique activity patterns related to pupil diameter changes in anesthetized rat brains. Going beyond the typical rs-fMRI correlation analysis with pupil dynamics, we decomposed spatiotemporal patterns of rs-fMRI with principal component analysis (PCA) and characterized the cluster-specific pupil-fMRI relationships by optimizing the PCA component weighting via decoding methods. This work shows that pupil dynamics are tightly coupled with ...
Ba, F, Martin, W.R.W., (2015). Dopamine transporter imaging as a diagnostic tool for parkinsonism and related disorders in clinical practice. Parkinsonism Related Disorders, 21: 87-94.. Ba, F., Scott, I., Camicioli, R., Martin, W.R.W., and Sankar, T., (2016). Early-onset parkinsonism induced by pallidal deep brain stimulation in cervical dystonia. Parkinsonism Related Disorders, DOI: http://dx.doi.org/10.1016/j.parkreldis.2016.04.018. Ba, F., Obaid, M., Wieler, M., Camicioli, R., and Martin, W.R.W., (2016). Parkinson Disease: The Relationship Between Non-motor Symptoms and Motor Phenotype. Canadian Journal of Neurological Sciences. 43(2):261-7. DOI: http://dx.doi.org/10.1017/cjn.2015.328 Anderson, D., Beecher, G., and Ba, F.*, (2017) Deep Brain Stimulation in Parkinsons Disease: New and Emerging Targets for Refractory Motor and Non-Motor Symptoms, Parkinsons disease. Jun 2017; 2017 (1). https://doi.org/10.1155/2017/5124328. Cai, J., Lee, S., Ba, F., Garg, S., Kim, L.J., Liu, A., Kim, D., ...
Todays world has changed, but what remains certain is Globus commitment to guest safety, comfort and peace-of-mind while traveling with us. To that end, Globus has established a worldwide Assurance program, with enhanced on-trip protocols and procedures, to ensure the health - and happiness - of guests throughout their travels with us.. It all starts with Globus Global Health & Safety Team, dedicated to ensuring that cleanliness of all operations exceeds todays travel standards-from start to finish. The following areas address Globus commitment to providing a safe and clean environment for guests.. A SAFE & WARM WELCOME Globus will enact new tour check-in procedures and pre-trip health screenings to offer guests a safe start to their journey, including adherence to social distancing requirements.. BLENDING CULTURAL PROXIMITY WITH SOCIAL DISTANCE Globus will ensure safe distances for guests throughout the journey, on coach and during excursions. This includes providing masks for guests use ...
This condition is primarily characterized by a lump in the throat, not related with eating in any way. This sensation does not arise after choking while eating. Actually, the sensation may be alleviated by eating or drinking. Patients suffering from this condition usually feel as if something has firmly lodged in the throat. The obstruction cannot be swallowed or washed down by drinking hot water or beverages.. Although this condition does not interfere with the swallowing process in any way, it tends to make the activity slightly uncomfortable.. The symptoms of this condition are more or less straightforward. A feeling of obstruction in the throat is the main difficulty that is experienced by patients. There is generally no other discomfort or pain. In more serious cases, patients may suffer from some amount of discomfort in the upper chest. In some cases, suffering individuals may also experience some pain during swallowing. However, even with minor discomfort there is some possibility for ...
The basal ganglia refer to a group of closely connected structures including the striatum (the caudate and the putamen), the globus pallidus, the substantia nigra and the subthalamic nucleus.. It seems to be generally agreed that the basal ganglia have something to do with the creation and execution of motor plans. Just watch a person with a typical basal ganglion affliction, such as Parkinsons disease, characterized by difficulty in starting or stopping the walking sequence, and realize how profundly these nuclei are involved in daily life.. In addition to their role in control of movement and posture, it now appears that the basal ganglia also play a more complex (cognitive) aspects of behavior and may be involved in limbic functions.. They are responsible not only for the integration of motor activity but probably also for the programming, beginning and termination of such activity. There are other definitions of the term basal ganglia: the archistriatum, the paleostriatum, and the ...
The net effect of basal ganglia activation through this so-called direct pathway is thus excitiation of cortical neurons. The subthalamic nucleus, on the other hand, forms part of an internal loop within the basal ganglia that via excitation of a portion of the globus pallidus has a net inhibitory effect on the cortical neurons, so called indirect pathway. The balance of excitatotry and inhibibory effects of the basal ganglia releases and coordinates desired movements. ...
The basal ganglia (the odd snail-shaped region in the diagram below, which includes the aforementioned putamen, globus pallidus and caudate nucleus, as well as a few other sub regions we havent yet discussed) is another key brain region which is believed to be involved in ADHD and other related disorders. The basal ganglia region of the brain essentially determine how fast a persons brain idles. This region has often been found to be underactive in ADHD and similar disorders and overactive in obsessive compulsive or anxiety-related disorders. Thus the basal ganglia function can have some far-reaching implications. Not surprisingly, then, is the fact that mis-development in the wiring process of the basal ganglia (such as seen in the formative years), may play a crucial role on the onset of ADHD both directly, and indirectly (via interaction with other key ADHD brain regions ...
The objective of this trial is to demonstrate the efficacy and safety of pallidal DBS in HD patients, and show superiority of DBS on motor function in the stimulation group compared to stimulation-off group and that DBS is a good alternative to medication therapy. For ethical reasons all patients (including the controls) will receive best contact stimulation after assessment of the primary endpoint for 3 months and a final follow up is planned 6 month after study inclusion. All patients will receive a bilateral stereotactic insertion of quadripolar electrodes (Medtronic Inc, 3387) into the Globus pallidus (GP) for chronic high-frequency stimulation with the upper two contacts reaching the external GP (GPe) and the lower two contacts placed in the internal GP (GPi). The implantation of the stimulator (ACTIVA®PC) will take place in the same procedure. This approach has been successfully used in previous studies of DBS in dystonia. ...
Brain operations to treat various forms of dystonia were first performed 40-50 years ago. The operations involved a precisely controlled lesioning (destruction) of deep structures in the brain involved in movement control. Two different deep structures, called the thalamus, and the globus pallidus, were operated upon. Lesioning was performed by freezing or coagulation. Surgical techniques were much less advanced in that era that they are today, so the result were not consistent and complications were frequent.
In the current study, three portions of the ARAS (the dorsal lower ARAS, ventral lower ARAS and upper ARAS) in a patient with impaired consciousness following DPHL caused by CO poisoning were evaluated using DTT. We found that these three portions of the ARAS were injured in both hemispheres: the upper ARAS - decreased neural connectivity to both frontal cortexes, basal forebrains, basal ganglia and thalami, the dorsal lower ARAS - non-reconstruction in the right side and narrowing in the left side and the ventral lower ARAS -non-reconstruction in both sides. We believe that the impaired consciousness in this patient was ascribed to the injury of the three portions of the ARAS.. Many studies have reported abnormality of the white matter including basal ganglia (caudate nucleus, putamen, and globus pallidus) in patients with DPHL using various neuroimaging tools including conventional MRI [5-13]. Neurological manifestations were observed as follows: 1) cognitive impairments - confusion, ...
Regulator of G protein signaling 14 (RGS14) is a multifunctional signaling protein primarily expressed in mouse pyramidal neurons of hippocampal area CA2 where it regulates synaptic plasticity important for learning and memory. However, very little is known about RGS14 protein expression in the primate brain. Here, we validate the specificity of a new polyclonal RGS14 antibody that recognizes not only full-length RGS14 protein in primate, but also lower molecular weight forms of RGS14 protein matching previously predicted human splice variants. These putative RGS14 variants along with full-length RGS14 are expressed in the primate striatum. By contrast, only full-length RGS14 is expressed in hippocampus, and shorter variants are completely absent in rodent brain. We report that RGS14 protein immunoreactivity is found both pre- and postsynaptically in multiple neuron populations throughout hippocampal area CA1 and CA2, caudate nucleus, putamen, globus pallidus, substantia nigra, and amygdala in ...
MR images through, A, C, E, basal ganglia and, B, D, F, posterior fossa at level of dentate nucleus. Images are shown for, A, B, control group patient 4, and the, C, D, first and, E, F, last examinations performed in contrast group patient 13. Regions of interest used in quantification of signal intensity are shown as dashed lines for globus pallidus (green), thalamus (blue), dentate nucleus (yellow), and pons (red).. ...
MR images through, A, C, E, basal ganglia and, B, D, F, posterior fossa at level of dentate nucleus. Images are shown for, A, B, control group patient 4, and the, C, D, first and, E, F, last examinations performed in contrast group patient 13. Regions of interest used in quantification of signal intensity are shown as dashed lines for globus pallidus (green), thalamus (blue), dentate nucleus (yellow), and pons (red).. ...
Using a newly developed MFC method, we have observed increased MFC values in the deep gray matter of patients with mTBI, suggesting a role for iron in the pathophysiologic cascade of events after the traumatic insult. In addition, our findings support the hypothesis that not only white matter regions and the gray-white matter junction are injured by the shear stress forces associated to the traumatic event but also subcortical gray matter regions such as the thalamus and the globus pallidus.. We used for our study the MFC sequence: although the conventional method for exploiting the effect of MFIs has been to measure the relaxation rates R2, R2*, and R2′, this has possible disadvantages; in particular R2 and R2* are influenced by other relaxation mechanisms such as dipolar interactions, whereas MFC depends only on MFIs and weakly on water diffusion. Although R2′ can provide a better characterization of MFIs than R2 and R2*, the precise physical meaning of R′ is not well determined, and it ...
M. Lévesque, Parent, R., and Parent, A., Cellular and subcellular localization of neurokinin-1 and neurokinin-3 receptors in primate globus pallidus., Eur J Neurosci, vol. 23, no. 10, pp. 2760-72, 2006. ...
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I finally got rid of the feeling of a lump in my throat, which my doctor diagnosed as Globus Pharyngeus. Just a few easy lifestyle changes and its gone. What a relief!