Vestibular Diseases: Pathological processes of the VESTIBULAR LABYRINTH which contains part of the balancing apparatus. Patients with vestibular diseases show instability and are at risk of frequent falls.Dizziness: An imprecise term which may refer to a sense of spatial disorientation, motion of the environment, or lightheadedness.Vestibular Function Tests: A number of tests used to determine if the brain or balance portion of the inner ear are causing dizziness.
My Older Dog is Disoriented, Unbalanced, and Confused - Puppy In TrainingFiled Under: Health Tagged With: Canine Vestibular Disease, Old Dog Vestibular Disease ... their dog was diagnosed and treated for a disease know as Canine Vestibular Disease also known as Old Dog Vestibular Symptom. ... What is Canine Vestibular Disease?. Some commons symptoms of this disease are leaning toward one side, shaking of the head, and ... it really sounds like Geriatric Vestibular Disease… now if it's Central or Peripheral Geriatric Vestibular… i don't know. She ...
Vestibular Rehabilitation for Patients With Fall-related Wrist Fractures - Full Text View - ClinicalTrials.govVestibular rehabilitation, twice a week for 9 weeks. Other: Vestibular rehabilitation The intervention program comprises of ... Vestibular asymmetry. Vestibular rehabilitation. Fall-related wrist fractures. Patients 50 years or older. ... The aim of this study is therefore to find out if vestibular rehabilitation can have any effect on vestibular function among ... Vestibular rehabilitation programs were first developed in the forties, originally used for peripheral vestibular disorder, in ...
A new method to improve the imbalance in chronic unilateral vestibular loss: the organization of refixation saccades... four post-surgical vestibular schwannoma, and three cases after intra-tympanic gentamycin in patients with Ménière's disease). ... and 16 patients with chronic unsteadiness due to unilateral vestibular loss (nine vestibular neuritis, ... A new method to improve the imbalance in chronic unilateral vestibular loss: the organization of refixation saccades. Matiñó- ... refixation saccades in a gathered pattern is a process that can be artificially induced in patients with unilateral vestibular ...
Recovery of Visual Acuity in People With Vestibular Deficits - Full Text View - ClinicalTrials.govCranial Nerve Diseases. Nervous System Diseases. Peripheral Nervous System Diseases. Neuromuscular Diseases. ... Vestibulocochlear Nerve Diseases. Retrocochlear Diseases. Ear Diseases. Otorhinolaryngologic Diseases. Otorhinolaryngologic ... Vestibular Neuronitis Vestibular Neuronitis, Bilateral Vestibular Schwannoma Other: Control exercises Other: gaze stabilization ... Patient had to have either a unilateral vestibular or bilateral vestibular hypofunction defined as follows: Unilateral ...
Vestibular DiseaseCat Diseases & Conditions A-Z. Idiopathic Vestibular Disease in Cats. If you spin around in circles as fast as you can and then ... Cat Diseases & Conditions A-Z. Idiopathic Vestibular Disease in Cats. If you spin around in circles as fast as you can and then ... Dog Diseases & Conditions A-Z. Peripheral Vestibular Disease in Dogs. If you spin around in circles as fast as you can and then ... you'll experience what your cat probably feels like if he's suffering with vestibular disease. Read More > ...
How do you treat vestibular disease in dogs? | Reference.comTreatment of vestibular disease in dogs is a combination of treating both the symptoms of the condition and any underlying ... Treatment of vestibular disease in dogs is a combination of treating both the symptoms of the condition and any underlying ... Vestibular disease in dogs is usually idiopathic, meaning its cause is unknown. Some potential causes include circulation or ... Vestibular disease may be prevented by avoiding head trauma and the overuse of certain medications. Neomycin and aminoglycoside ...
Vestibular disease/disorderMy OES recently suffered from vestibular disorder. She is 14 years of age, and I would like to know if this malady results in ... My OES recently suffered from vestibular disorder…' ...
Hobo has Vestibular Disease...can't/won't eat :( - Pet forum for dogs cats and humans - Pets.caHobo has Vestibular Disease...can't/won't eat :( Senior dogs ... Hobo has Vestibular Disease...can't/won't eat :( Wow, I ... Vestibular is very scary. Mac had an episode early last summer and it scared me to death. As you saw with Ginger, they do ... It really is a brutal disease to watch but it honestly does get better as suddenly as it came on. We know it could be weeks ... I've also heard lately that there is a connection with low thyroid and vestibular so you might want to check that out . ...
Vestibular Disease in Dogs | Badgerland Basset Hound Club, inc.Vestibular Disease in Dogs. ‹ The Basset Standard up Yeast Problems In Dogs › ...
Ménières Diseases | Johns Hopkins Vestibular Disorders CenterThese procedures cause a permanent loss of vestibular function .. Because Ménières disease eventually involves both ears in a ... Home , Neurology and Neurosurgery , Centers & Clinics , Neuro-Visual and Vestibular Disorders , Diseases and Conditions ... Ménières Diseases. Ménières disease is named after the 19th Century physician who described this condition. Ménières is a ... Cutting the vestibular nerve to the part of the labyrinth that relays vestibular sensation to the brain ...
Diseases Affecting the Inner Ear Balance Systems in Rabbits | petMDThe vestibular system is made up of the canal system, which receives information about rotational body movement, and the ... Head Tilt (Vestibular Disease) in Rabbits. The vestibular system is a major component of the sensory system, a complex system ... In rabbits, vestibular disease is commonly due to ear infection and brain abscesses. Lop-eared rabbits may be more likely to be ... vestibular disease. Any disorder of the neurons that may be characterized by rolling, circling, falling, etc. ...
Using Positron Emission Tomography to Predict Intracranial Tumor Growth in Neurofibromatosis Type II Patients - Full Text View ...Nervous System Diseases. Neurofibromatoses. Neurofibroma. Vestibular Diseases. Neurofibromatosis 2. Nerve Sheath Neoplasms. ... Peripheral Nervous System Diseases. Neuromuscular Diseases. Labyrinth Diseases. Ear Diseases. Otorhinolaryngologic Diseases. ... Neurodegenerative Diseases. Genetic Diseases, Inborn. Peripheral Nervous System Neoplasms. Nervous System Neoplasms. ... Most people with NF2 develop vestibular schwannomas, or tumors on the hearing and balance nerves. As they grow, vestibular ...
Effectiveness of Betaserc® (Betahistine Dihydrochloride) in Patients With Vestibular Vertigo in Routine Practice - Full Text...Vestibular Diseases. Labyrinth Diseases. Ear Diseases. Otorhinolaryngologic Diseases. Neurologic Manifestations. Nervous System ... vestibular vertigo Patients with vestibular vertigo of known or unknown origin, and for whom the physician has decided to ... Patients with vestibular vertigo of known or unknown origin, and for whom the physician has decided to prescribe 48 mg of ... Change of Vestibular Vertigo Attacks Frequency From the End of Observational Treatment Period to the End of Follow-up Period [ ...
Vestibular Function Outcome After Cartilage Cap Occlusion Surgery - Full Text View - ClinicalTrials.govNervous System Diseases. Signs and Symptoms. Vestibular Diseases. Labyrinth Diseases. Ear Diseases. Otorhinolaryngologic ... Vestibular Dizziness Superior Semicircular Canal Dehiscence Procedure: cartilage cap occlusion surgery Early Phase 1 ... Vestibular Function Outcome After Cartilage Cap Occlusion Surgery. This study has been withdrawn prior to enrollment. ... Objective Assessment of Vestibular Function Outcome After Cartilage Cap Occlusion Surgery for Dehiscent Superior Semicircular ...
Study of the Effectiveness of Vestibular Stimulation as a Coadjuvant Treatment in Major Depression - Full Text View -...Vestibular Diseases. Behavioral Symptoms. Mood Disorders. Mental Disorders. Labyrinth Diseases. Ear Diseases. ... Major depression is characterized by vestibular anomalies. The investigators hypothesized that vestibular stimulation will ... Study of the Effectiveness of Vestibular Stimulation as a Coadjuvant Treatment in Major Depression. This study has been ... Clinical Randomized Trial to Evaluate the Efficacy of Vestibular Stimulation as Coadjuvant Therapy in Major Depression. ...
Efficacy of Antiviral Medications in Controlling Vertigo Attacks of Patients With Meniere's Disease - Full Text View -...Meniere Disease. Vestibular Diseases. Labyrinth Diseases. Ear Diseases. Otorhinolaryngologic Diseases. Neurologic ... Meniere's disease is a chronic illness that affects a substantial number of patients every year worldwide. The disease is ... MedlinePlus related topics: Dizziness and Vertigo Meniere's Disease Drug Information available for: Acyclovir Acyclovir ... Nervous System Diseases. Signs and Symptoms. Endolymphatic Hydrops. Acyclovir. Antiviral Agents. Anti-Infective Agents. ...
Effects of Prismatic Spectacle Lenses on Symptoms of Dizziness, Headache and Anxiety as Caused by Vertical Heterophoria - Full...Nervous System Diseases. Signs and Symptoms. Sensation Disorders. Vestibular Diseases. Labyrinth Diseases. Ear Diseases. ... Genetic and Rare Diseases Information Center resources: Ocular Motility Disorders Motor Neuro-ophthalmic Disorders ...
Effect of V0251 in Acute Vertigo - Full Text View - ClinicalTrials.govVestibular Diseases. Labyrinth Diseases. Ear Diseases. Otorhinolaryngologic Diseases. Neurologic Manifestations. Nervous System ...
Vestibular Rehabilitation for Strokepatients With Dizziness - Full Text View - ClinicalTrials.govNervous System Diseases. Signs and Symptoms. Vestibular Diseases. Labyrinth Diseases. Ear Diseases. Otorhinolaryngologic ... Experimental: Vestibular rehabiliation Vestibular rehabiliation. Other: Vestibular rehabilitation Usual rehabilitation and four ... Vestibular Rehabilitation for Strokepatients With Dizziness. This study is currently recruiting participants. See Contacts and ... The aim of this study is to find out if vestibular rehabilitation can have any effect on function, balance and self-rated ...
Tetracycline-Derivatives for Treatment of Cerebral Arteriovenous Malformations and Aneurysms - Full Text View - ClinicalTrials...History of vestibular disease, (except benign positional vertigo). *Prior tetracycline use within 2 mos of baseline visit. ... Brain Diseases. Central Nervous System Diseases. Nervous System Diseases. Central Nervous System Vascular Malformations. ... Vascular Diseases. Cardiovascular Diseases. Vascular Malformations. Cardiovascular Abnormalities. Neoplasms, Vascular Tissue. ... Intracranial Arterial Diseases. Doxycycline. Minocycline. Tetracycline. Anti-Bacterial Agents. Anti-Infective Agents. ...
Dogs for Sale - Cats for Sale : TerrificPets.comHow old is Coran? He could have Old Dog Vestibular Disease. Dog Medical Questions › Infection Or Disease? ...
Vestibular DiseaseHow is vestibular disease treated? To diagnose vestibular disease, the veterinarian carefully performs diagnostic tests, examining the ear canals and performing a neurological exam. After it is certain that vestibular disease is the cause of the pet's symptoms, very little can be done. There is not a cure for vestibular disease, so treatment usually involves curing the side-effects; the veterinarian can prescribe a medication to relieve nausea or a sedative that helps your pet manage its balance complications. The disease will gradually resolve on its own over the next 7 to 30 days. There remains no way to accelerate this process. Also, for some pets, the head-tilt side-effect will remain permanent. Once a pet gets vestibular disease, it is very rare that it reoccurs, though it is entirely possible for this to happen. For pets suffering from vestibular disease caused by another serious medical issue, further ...
Vestibular Disease in Dogs | River Road Animal Hospital Wasaga Beach, OntarioWe have had a couple cases of Vestibular Disease in the past month, one of whom is the pet of our Veterinary Technician, Stacey.. Tucker is a 15-year-old Irish Wolfhound mix who presented with quick onset of disorientation, head tilt and nystagmus (irregular jerking eye movements) . The first 48-hours was very difficult for her. She could not walk unassisted and had to be hand-fed. She was unable to function on her own. During the first three days she was very nauseous due to the nystagmus. It can be very scary for owners to see their pets this way.. This video shows Tucker experiencing nystagmus symptoms. It was taken within the first 3 hours of symptoms occurring.. ...
Canine Vestibular Disease | Common Dog DiseasesCanine vestibular disease, or vestibular syndrome, severely affects your dog's balance thanks to the inflammation of the cerebellum. Click here to read all about this condition.
Vestibular Products Bridgeport CT - Vestibular Products, Bridgeport CT Vestibular Disease in Cats, Bridgeport CT Vestibular...Welcome to the The Center for Hearing Loss Help Local Pages. Here you can find local information about Vestibular Products in Bridgeport, CT. We have compiled a list of businesses and services around around Bridgeport, including Audiologists that should help you with your search. In order to better help you find what you are looking for, the rest of the information on this page has also been targeted to Audiology. We hope this page helps satisfy your local needs.
Vestibular Lesions of the Central Vestibular Pathways | Vestibular Rehabilitation | F.A. Davis PT Collection | McGraw-Hill...In the majority of cases, central vestibular vertigo syndromes are caused by dysfunction or a deficit of sensory input induced by a lesion. In a small proportion of cases, they are a result of pathological excitation of various structures, extending from the peripheral vestibular organ to the vestibular cortex. Because peripheral vestibular disorders are always characterized by a combination of perceptual, ocular motor, and postural signs and symptoms, central vestibular disorders may manifest as "a complete syndrome" or with only single components. The ocular motor aspect, for example, predominates in the syndromes of upbeat or downbeat nystagmus. Lateral falls may occur without vertigo in vestibular thalamic lesions (thalamic astasia) or as lateropulsion in Wallenberg's syndrome.1,2 ...
GMS | 76. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie e. V. |...Introduction: To diagnose a vestibular neuritis the caloric testing of the horizontal semicircular canal is widely used. In recent year the function of the sacculus could be tested by using the vestibular evoked myogenic potentials (VEMP). The aim of this study was to investigate the saccular influence on recovery after unilateral vestibular loss. Methods: We examined 15 Patients (age: 33 to 67 years, mean: 55 years) with acute vestibular symptoms using caloric testing and VEMP shortly after onset of symptoms and 4 weeks later. All included Patients showed an absent caloric response on one side.. The VEMPs were recorded on the activated M. sternocleidomastoideus (SCM) and averaged over 200 stimuli. Tone bursts (95 dB nHL; 500 Hz; stimulation rate 5 Hz) were used to generate the VEMPs.. Results: Initially 11 Patients showed pos. VEMP and 4 neg. VEMP. After 4 Weeks in all but 1 patients with initial pos. VEMP a complete recovery of the ...
The Dizziness and Balance Center at the University of WashingtonDiagnostic Workup:. Nearly all new Center patients need a baseline measure of the primary vestibular and balance functions plus, in many cases, special vestibular test measures. The primary measure of vestibular function is Videonystagmography (VNG; a.k.a. ENG, electronystagmography) and the primary measure of balance function is the Computerized Dynamic Posturography (CDP). These two tests constitute the basic vestibular test battery. The special test measures are the Dynamic Visual Acuity (DVA) to document and measure oscillopsia, Vestibular Evoked Myogenic Potential (VEMP) to assess saccular and inferior vestibular nerve function, the Rapid Head Thrust Test using scleral search coils (RHT) to evaluate specific semicircular canal function, the Rotational Chair Test to assess overall vestibular system performance, pediatric vestibular testing, and central compensation under ...
Controlling motion sickness and spatial disorientation and enhancing vestibular rehabilitation with a user-worn see-through...All patients with motion intolerance rated the technology as helpful for nine symptoms assessed, and 96% rated the display device as simple and easy to use. Duration of symptoms significantly decreased with use of the technology displayed. In patients undergoing vestibular rehabilitation, there were no significant differences in amount of change from pre- to posttherapy on objective balance tests between display device users and controls. However, those using the technology required significantly fewer rehabilitation sessions to achieve those outcomes than the control group. ...
Balance Vestibular Rehabilitation Boulder | NB Physical TherapyNB Physical Therapy provides balance vestibular rehabilitation therapy. If a vestibular diagnosis has been made, you will be referred our physical therapist
References related to ototoxicityReturn to Bilateral Loss document, Return to Ototoxicity document. Runge CF, Shupert CL, Horak FB, Zajac FE. Role of vestibular information in initiation of rapid postural responses. EBR 1998 122:403-412. Patients with acquired bilateral vestibular loss are as able as normal subjects to generate 'hip strategy' type postural responses. This suggests that vestibular information is not necessary to trigger a 'hip strategy'. COMMENT: This correlates well with the clinical observation that after several years, imbalance may become rather subtle in patients with bilateral vestibular loss. Patients with recent vestibular loss (not studied here), are much more impaired.. Gwendeh B, Gibb AG, Aziz N, Kong N, Zahir Z. Vancomycin administration in continuous ambulatory peritoneal dialysis: the risk of ototoxicity. Otol HNS 1998:118:551-8. :In 16 patients on CAPD (chronic ambulatory peritoneal dialysis), including 22 episodes of ...
Physical therapy treatments For Vestibular problemsFirst settlement bodily remedy fspt. Orthopedic physical therapists at fspt diagnose, manage, and treat issues and injuries of muscle groups, joints, bones and tendons. We also are capable of treat troubles. Bodily therapy who can gain and how can it assist?. Bodily therapy pursuits to assist patients keep, recover or improve physical potential that can be impaired because of a circumstance or damage. Vestibular sickness data apn physical therapy. What's the best remedy for vestibular issues? Majority of human beings have by no means skilled a vestibular sickness. The most out of my bodily therapy? Vestibular rehabilitation remedy (vrt) vestibular. Treatment techniques utilized in rehabilitation can also be useful for those secondary troubles. Vestibular rehabilitation (vr), or vestibular rehabilitation remedy (vrt) is a specialized shape of remedy intended to alleviate both the number one ...
Fatigue, Stress and Responsibility By the Vestibular Disorders Association and Vicki Schmall, PhD, Oregon State University...PO BOX PORTLAND, OR FAX: (503) (800) Fatigue, Stress and Responsibility By the Vestibular Disorders Association and Vicki Schmall, PhD,
Videonystagmography VNG Electronystagmography ENG: Vestibular Testing - NYEEVestibular tests determine if there is something wrong with the balance (vestibular) portion of the inner ear.. The VNG/ENG test battery is the standard for determining if a vestibular (inner ear) or central (brain) problem is causing a balance or dizziness problem. It is a series of tests that demonstrate how a person's eyes respond to information from the vestibular portion of the inner ear system.. Hi-tech video goggles with infrared cameras measure the movement of the eyes. The test consists of visual tasks, sitting and laying in different positions, and caloric testing. For caloric testing, the audiologist will stimulate both of the ears (one at a time) with warm and cold, air or water, to assess the response of the inner ear to the stimulation.. ...
Comparison of vestibulo-ocular reflex instantaneous gain and velocity regression in differentiating the peripheral vestibular...Comparison of vestibulo-ocular reflex instantaneous gain and velocity regression in differentiating the peripheral vestibular disorders
Physical TherapyVestibular rehabilitation is a specialized area of physical therapy that addresses symptoms of dizziness and disequilibrium (imbalance). The vestibular system is comprised of small structures deep within the ear canal which help your body sense its position relative to gravity. The inner ear constantly communicates this information to your brain for processing. The brain then tells your muscles how to adjust to maintain balance. Problems at any step of the communication process can lead to a loss of stability during daily activities ...
Kabuki syndromeBuild: Wed Jun 21 18:33:50 EDT 2017 (commit: 4a3b2dc). National Center for Advancing Translational Sciences (NCATS), 6701 Democracy Boulevard, Bethesda MD 20892-4874 • 301-435-0888. ...
Recovery of Vestibular Function During Regeneration - J. DickmanGaze stabilization during head motion is a complex behavioral response that is highly dependent upon a functioning vestibular system. In fact, vestibular insult...
Sephora Professionnel Kabuki Brush by Sephora Collection, Makeup Tools ReviewReview for Sephora Collection, Sephora Professionnel Kabuki Brush, Makeup Tools. Read more Sephora Collection product reviews at Total Beauty.
Dog healthGyromancy: Gyromancy is a method of divination in which a person spins around inside or walks the circumference of a circle drawn on the ground, the perimeter of which is marked with the letters of an alphabet. The divination is inferred from the letter at the position where the person either stumbles or falls across the circle’s edge.Posturography: Posturography is a general term that covers all the techniques used to quantify postural control in upright stance in either static or dynamic conditions. Among them, Computerized dynamic posturography (CDP), also called test of balance (TOB), is a non-invasive specialized clinical assessment technique used to quantify the central nervous system adaptive mechanisms (sensory, motor and central) involved in the control of posture and balance, both in normal (such as in physical education and sports training) and abnormal conditions (particularly in the diagnosis of balance disorders and in physical therapy and postural re-education).
(1/298) 3D MRI of the membranous labyrinth. An age related comparison of MR findings in patients with labyrinthine fibrosis and in persons without inner ear symptoms.
PURPOSE: We compared MRI of the membranous labyrinth in patients with chronic non-neoplastic inner ear disease and MR signs of labyrinthine fibrosis and controls depending on their age, in order to establish whether there were any MR differences regarding patient age groups, control age groups and between the patients and controls themselves. MATERIALS AND METHODS: Clinical ENT examinations as well as a T2* weighted 3D CISS (Constructive Interference in Steady State) sequence with a slice thickness of 0.7 mm were performed. Our collective was subdivided as follows: 0-19 years (10 controls, 3 patients with chronic non-neoplastic inner ear disease), 20-49 years (55 controls, 8 patients), 50 years and older (40 controls, 22 patients). Detectability of labyrinthine structures (e.g. cochlea, vestibule, semicircular canals) and filling defects were evaluated. RESULTS: In the 3 age-groups of the control collective no significant differences were observed in the membranous labyrinth. However differences concerning labyrinthine detectability emerged between controls and patients in both the 20-49 years and 50 years and older age groups. In the patient collective the 3 age groups showed no significant discrepancy in the mean number of lesions. CONCLUSION: Filling defects of the membranous labyrinth on 3D CISS MR images are pathological even in older persons. We would therefore recommend high resolution T2* weighted MRI in the case of suspected labyrinthine fibrosis. (+info)
(2/298) Pontine lesions mimicking acute peripheral vestibulopathy.
OBJECTIVES: Clinical signs of acute peripheral vestibulopathy (APV) were repeatedly reported with pontine lesions. The clinical relevance of such a mechanism is not known, as most studies were biased by patients with additional clinical signs ofbrainstem dysfunction. METHODS: Masseter reflex (MassR), blink reflex (BlinkR), brainstem auditory evoked potentials (BAEPs), and DC electro-oculography (EOG) were tested in 232 consecutive patients with clinical signs of unilateral APV. RESULTS: Forty five of the 232 patients (19.4%) had at least one electrophysiological abnormality suggesting pontine dysfunction mainly due to possible vertebrobasilar ischaemia (22 patients) and multiple sclerosis (eight patients). MassR abnormalities were seen in 24 patients, and EOG abnormalities of saccades and following eye movements occurred in 22 patients. Three patients had BlinkR-R1 abnormalities, and one had delayed BAEP waves IV and V. Clinical improvement was almost always (32 of 34 re-examined patients) associated with improvement or normalisation of at least one electrophysiological abnormality. Brain MRI was done in 25 of the 44 patients and confirmed pontine lesions in six (two infarcts, three inflammations, one tumour). CONCLUSIONS: Pontine dysfunction was suggested in 45 of 232 consecutive patients with clinical signs of APV on the basis of abnormal electrophysiological findings, and was mainly attributed to brainstem ischaemia and multiple sclerosis. The frequency of pontine lesions mimicking APV is underestimated if based on MRI established lesions only. (+info)
(3/298) EMG responses to free fall in elderly subjects and akinetic rigid patients.
OBJECTIVES: The EMG startle response to free fall was studied in young and old normal subjects, patients with absent vestibular function, and patients with akinetic-rigid syndromes. The aim was to detect any derangement in this early phase of the "landing response" in patient groups with a tendency to fall. In normal subjects the characteristics of a voluntary muscle contraction (tibialis anterior) was also compared when evoked by a non-startling sound and by the free fall startle. METHODS: Subjects lay supine on a couch which was unexpectedly released into free fall. Latencies of multiple surface EMG recordings to the onset of free fall, detected by a head mounted linear accelerometer, were measured. RESULTS AND CONCLUSIONS: (1) EMG responses in younger normal subjects occurred at: sternomastoid 54 ms, abdominals 69 ms, quadriceps 78 ms, deltoid 80 ms, and tibialis anterior 85 ms. This pattern of muscle activation, which is not a simple rostrocaudal progression, may be temporally/spatially organised in the startle brainstem centres. (2) Voluntary tibialis EMG activation was earlier and stronger in response to a startling stimulus (fall) than in response to a non-startling stimulus (sound). This suggests that the startle response can be regarded as a reticular mechanism enhancing motor responsiveness. (3) Elderly subjects showed similar activation sequences but delayed by about 20 ms. This delay is more than can be accounted for by slowing of central and peripheral motor conduction, therefore suggesting age dependent delay in central processing. (4) Avestibular patients had normal latencies indicating that the free fall startle can be elicited by non-vestibular inputs. (5) Latencies in patients with idiopathic Parkinson's disease were normal whereas responses were earlier in patients with multiple system atrophy (MSA) and delayed or absent in patients with Steele-Richardson-Olszewski (SRO) syndrome. The findings in this patient group suggest: (1) lack of dopaminergic influence on the timing of the startle response, (2) concurrent cerebellar involvement in MSA may cause startle disinhibition, and (3) extensive reticular damage in SRO severely interferes with the response to free fall. (+info)
(4/298) Sympathetic contralateral vestibulopathy after unilateral zoster oticus.
A unique case of initially right sided varicella zoster induced Ramsay-Hunt syndrome with complete vestibular loss is reported. The patient subsequently developed deficits of the left vestibule 5 months later. An autoimmune pathogenesis of the left vestibular failure rather than bilateral varicella zoster infection was suggested by the following data: (1) no evidence of vesicular eruptions on the left auricle and the virtual absence of antiviral antibodies after onset of bilateral vestibulopathy; (2) prompt response of the left vestibule to immunosuppressive therapy with corticosteroids; and (3) presence of atypical nervous tissue specific autoantibodies against a 45 kDa protein. (+info)
(5/298) Probability of bilateral disease in people presenting with a unilateral vestibular schwannoma.
BACKGROUND: Some 4%-5% of those who develop vestibular schwannomas have neurofibromatosis type 2 (NF2). Although about 10% of these patients present initially with a unilateral vestibular schwannoma, the risk for a patient with a truly sporadic vestibular schwannoma developing contralateral disease is unknown. METHODS: A United Kingdom survey of 296 patients with NF2 was reviewed for laterality of vestibular schwannoma at presentation and the presence of other NF2 related features. The time to presentation of bilateral disease was calculated for patients presenting with a unilateral tumour. Mutation analysis of the NF2 gene was carried out on all available cases presenting initially with unilateral disease. RESULTS: Of 240 patients with NF2 with vestibular schwannomas, 45 (18%; 32 sporadic, 13 familial) had either a unilateral tumour or delay in detection between the first and contralateral tumours. Among those tested for NF2 mutations, eight of 27 and nine of 13 were identified among sporadic and familial cases respectively. Sporadic cases showed a high female to male ratio and 19 of 32 have not as yet developed a contralateral tumour (mean 4.1 years after diagnosis of the first). Thirteen of 32 sporadic patients developed a contralateral tumour (mean 6.5 years after the first tumour diagnosis, range 0-22 years) compared with 11 of 13 familial patients (mean delay 5 years, range 0-16 years). Seven of the 45 patients had neither a family history of NF2 nor evidence of related tumours at initial presentation (six before the age of 35 years). CONCLUSION: The risk of patients with sporadic unilateral vestibular schwannomata developing a contralateral tumour in the absence of family history or other features of NF2 is low, but those presenting with other neurogenic tumours in addition to vestibular schwannoma are at high risk of harbouring an NF2 mutation in at least a proportion of their somatic cells. (+info)
(6/298) Postural characteristics of diabetic neuropathy.
OBJECTIVE: To explore the posturographic correlates of diabetic neuropathy by comparing the performances of three groups of diabetic patients (severe, moderate, and absent neuropathy) with those of normal subjects and four clinical control groups. RESEARCH DESIGN AND METHODS: Using the Interactive Balance System (Tetrax, Ramat Gan, Israel), based on the assessment of the interaction of vertical pressure fluctuations on four independent platforms, one for each heel and toe part, respectively, posturographic examinations were given to 28 diabetic patients (8 with severe, 12 with moderate, and 8 with no peripheral neuropathy), 30 normal control subjects, and a clinical control group of 52 patients (14 with stage II Parkinson's disease, 13 with brain damage, 7 with whiplash, and 19 with peripheral vestibular pathology). The following posturographic parameters were evaluated; 1) general stability; 2) Fourier analysis showing patterns of sway intensity within eight frequency bands between 0.1 and 3 Hz; 3) weight distribution; 4) synchronization of sway; and 5) performance patterns for eight positions, requiring closure of eyes and standing on an elastic surface, as well as left, right, back, and downward head turns. RESULTS: For positions with closed eyes, diabetic patients with severe and moderate neuropathy were significantly less stable than normal subjects and diabetic patients without neuropathy, but diabetic patients with severe and moderate neuropathy turned out to be as equally unstable as clinical control subjects. However, for sway intensity within the band of 0.5 to 1.00 Hz on positions with lateral head turn with occluded vision, neuropathic diabetic patients performed significantly worse than did both normal and clinical control subjects. The same posturographic parameter also differed significantly between normal subjects and diabetic patients without neuropathy. CONCLUSIONS: As reported in previous studies, general instability in diabetic neuropathy is not a sufficiently characteristic correlate of the syndrome. On the other hand, spectral analysis of sway on stressful positions involving head turning appears to differentiate diabetic neuropathy from other disorders involving postural disturbances. (+info)
(7/298) A new mouse insertional mutation that causes sensorineural deafness and vestibular defects.
This article describes a new recessive insertional mutation in the transgenic line TgN2742Rpw that causes deafness and circling behavior in mice. Histologic analysis revealed virtually complete loss of the cochlear neuroepithelium (the organ of Corti) in adult mutant mice. In association with the neuroepithelial changes, there is a dramatic reduction of the cochlear nerve supply. Adult mutants also show morphological defects of the vestibular apparatus, including degeneration of the saccular neuroepithelium and occasional malformation of utricular otoconia. Audiometric evaluations demonstrated that the mice displaying the circling phenotype are completely deaf. Molecular analysis of this mutant line revealed that the transgenic insertion occurred without creating a large deletion of the host DNA sequences. The mutant locus was mapped to a region on mouse chromosome 10, where other spontaneous, recessive mutations causing deafness in mice have been mapped. (+info)
(8/298) Influence of surgical plugging on horizontal semicircular canal mechanics and afferent response dynamics.
Mechanical occlusion of one or more of the semicircular canals is a surgical procedure performed clinically to treat certain vestibular disorders and used experimentally to assess individual contributions of separate canals and/or otoliths to vestibular neural pathways. The present experiments were designed to determine if semicircular canal afferent nerve modulation to angular head acceleration is blocked by occlusion of the endolymphatic duct, and if not, what mechanism(s) might account for a persistent afferent response. The perilymphatic space was opened to gain acute access to the horizontal canal (HC) in the oyster toadfish, Opsanus tau. Firing rate responses of HC afferents to sinusoidal whole-body rotation were recorded in the unoccluded control condition, during the process of duct occlusion, and in the plugged condition. The results show that complete occlusion of the duct did not block horizontal canal sensitivity; individual afferents often exhibited a robust firing rate modulation in response to whole-body rotation in the plugged condition. At high stimulus frequencies (about >8 Hz) the average sensitivity (afferent gain; spikes/s per degrees /s of head velocity) in the plugged condition was nearly equal to that observed for unoccluded controls in the same animals. At low stimulus frequencies (about <0.1 Hz), the average sensitivity in the plugged condition was attenuated by more than two orders of magnitude relative to unoccluded controls. The peak afferent firing rate for sinusoidal stimuli was phase advanced approximately 90 degrees in plugged canals relative to their control counterparts for stimulus frequencies approximately 0.1-2 Hz. Data indicate that afferents normally sensitive to angular velocity in the control condition became sensitive to angular acceleration in the plugged condition, whereas afferents sensitive to angular acceleration in the control condition became sensitive to the derivative of acceleration or angular jerk in the plugged condition. At higher frequencies (>8 Hz), the phase of afferents in the plugged condition became nearly equal, on average, to that observed in controls. A three-dimensional biomechanical model of the HC was developed to interpret the residual response in the plugged condition. Labyrinthine fluids were modeled as incompressible and Newtonian; the membranous duct, osseous canal and temporal bone were modeled as visco-elastic materials. The predicted attenuation and phase shift in cupular responses were in close agreement with the observed changes in afferent response dynamics after canal plugging. The model attributes the response of plugged canals to labyrinthine fluid pressure gradients that lead to membranous duct deformation, a spatial redistribution of labyrinthine fluids and cupular displacement. Validity of the model was established through its ability to predict: the relationship between plugged canal responses and unoccluded controls (present study), the relationship between afferent responses recorded during mechanical indentation of the membranous duct and physiological head rotation, the magnitude and phase of endolymphatic pressure generated during HC duct indentation, and previous model results for cupular gain and phase in the rigid-duct case. The same model was adjusted to conform to the morphology of the squirrel monkey and of the human to investigate the possible influence of canal plugging in primates. Membranous duct stiffness and perilymphatic cavity stiffness were identified as the most salient model parameters. Simulations indicate that canal plugging may be the most effective in relatively small species having small labyrinths, stiff round windows, and stiff bony perilymphatic enclosures. (+info)
- This study has included 10 healthy subjects (four males, six females), and 16 patients with chronic unsteadiness due to unilateral vestibular loss (nine vestibular neuritis, four post-surgical vestibular schwannoma, and three cases after intra-tympanic gentamycin in patients with Ménière's disease). (cun.es)
causes of dizziness
- Modern research has widened the use of vestibular rehabilitation to patients with other causes of dizziness than peripheral vestibular disorders. (clinicaltrials.gov)
- There are indications that vestibular rehabilitation can have effect of neurological causes of dizziness and vertigo and it therefore seems important to find out if vestibular rehabilitation can affect dizziness among patients with stroke. (clinicaltrials.gov)
- VOR adaptation and organization of refixation saccades in a gathered pattern is a process that can be artificially induced in patients with unilateral vestibular loss who have not developed it naturally, improving imbalance and vestibular disability. (cun.es)
- The purpose of this study was to examine the effect of an exercise intervention on visual acuity during head movement in patients with unilateral and bilateral vestibular hypofunction. (clinicaltrials.gov)
- The purpose of this study is to determine whether exercises relieve the symptoms of dizziness and imbalance in people with vestibular deficits and improves the ability to see clearly during head movements. (clinicaltrials.gov)
- Dizziness has been identified as a risk factor for fall and vestibular asymmetry has been found among patients with fall-related wrist fractures as well as among patients with hip-fracture. (clinicaltrials.gov)
- Vestibular Rehabilitation for Strokepatients With Dizziness - a Randomized Controlled Trial. (clinicaltrials.gov)
- When the vestibular nerve, which travels from the inner ear to the brain, malfunctions. (puppyintraining.com)
- Therefore, it would be interesting to find out if it is possible to influence vestibular asymmetry with vestibular rehabilitation. (clinicaltrials.gov)
- The aim of this study is therefore to find out if vestibular rehabilitation can have any effect on vestibular function among patients with fall-related wrist fracture. (clinicaltrials.gov)
- The intervention program comprises of vestibular rehabilitation, at group sessions, twice a week for 9 weeks. (clinicaltrials.gov)
- Vestibular rehabilitation aims to facilitate rearrangement and recruitment of the control capacities of the vestibular system, by letting the patient be exposed to unstable body positions, such as standing on foam and performing head, trunk or eye-movements. (clinicaltrials.gov)
- Vestibular rehabilitation programs were first developed in the forties, originally used for peripheral vestibular disorder, in order to facilitate recovery. (clinicaltrials.gov)
- The aim of this study is to find out if vestibular rehabilitation can have any effect on function, balance and self-rated health among patients with first time stroke. (clinicaltrials.gov)
- Some commons symptoms of this disease are leaning toward one side, shaking of the head, and walking around in circles. (puppyintraining.com)
- If you spin around in circles as fast as you can and then attempt to walk in a straight line, you'll experience what your cat probably feels like if he's suffering with vestibular disease. (pethealthnetwork.com)
- Treatment of vestibular disease in dogs is a combination of treating both the symptoms of the condition and any underlying conditions associated with it. (reference.com)
- Decrements in visual acuity during head movement in patients with vestibular hypofunction are potentially serious problems. (clinicaltrials.gov)
- Vestibular disease may be prevented by avoiding head trauma and the overuse of certain medications. (reference.com)
- Oscillopsia occurs because of inadequate vestibulo-ocular reflex (VOR) gain and suggests that compensation for the vestibular loss has not occurred. (clinicaltrials.gov)
- The ABC-scale has proven to be able to identify the influence that vestibular dysfunction can have on daily activities. (clinicaltrials.gov)
- This disease is not fatal and recovery just requires patience and tender loving care. (puppyintraining.com)
- There is no one method of treating vestibular disease in dogs. (reference.com)