ENG or VNG can be used to record nystagmus during oculomotor tests such as saccades, pursuit and gaze testing, optokinetics and also calorics (dithermal or monothermal). (wikipedia.org)
Significant findings were a severe spontaneous and constant true-whirling vertigo which worsened with headmovement, horizontal-torsional spontaneous nystagmus, abnormal caloric test, positive bedside head impulse tests, and inability to tolerate head-thrust test. (springer.com)
Caloric3
The standard ENG test battery consists of three parts: oculomotor evaluation positioning and positional testing caloric stimulation of the vestibular system The comparison of results obtained from various subtests of ENG assists in determining whether a disorder is central or peripheral. (wikipedia.org)
In peripheral vestibular disorders, the side of lesion can be inferred from the results of caloric stimulation and, to some degree, from positional findings. (wikipedia.org)
Traditionally, the caloric test evaluates the vestibulo-ocular reflex (VOR) function of the horizontal SCC using non-physiological stimulus within the frequency range of 0.002-0.004 Hz ( 8 ). (frontiersin.org)
Gaze2
Possible PSP requires the presence of a gradually progressive disorder with onset at age 40 or later, either vertical supranuclear gaze palsy or both slowing of vertical saccades and prominent postural instability with falls in the first year of onset, as well as no evidence of other diseases that could explain these features. (neurology.org)
Even when we attempt to fix our gaze, small involuntary eye movements are performed in order to overcome loss of vision due to uniform stimulation of the retinal photoreceptors [1-4]. (heraldopenaccess.us)
Neurons1
For visually guided saccades, neurons in the superior colliculus (SC) emit a burst of spikes to register the appearance of stimulus, and many of the same neurons discharge another burst to initiate the eye movement. (bvsalud.org)
Oculomotor3
To further investigate whether the basal ganglia actually influence error-based learning, we reversibly inactivated the oculomotor portion of the substantia nigra pars reticulata (SNr) in two monkeys and tested saccade adaptation. (eneuro.org)
Thus, our data suggest that the oculomotor SNr assists saccade adaptation by strengthening the error signal. (eneuro.org)
Here, we address this question by showing that inactivation of the oculomotor basal ganglia influences the saccade motor learning, a well-established error-based motor learning model. (eneuro.org)
Movements3
To produce goal-directed eye movements known as saccades, we must channel sensory input from our environment through a process known as sensorimotor transformation. (bvsalud.org)
Therefore, the saccade-compensating methodology enables researchers and healthcare professionals to rule out eye movements as a source of inaccuracies in pre-, post-, and follow-up assessments. (bmj.com)
Saccades are quick, simultaneous movements of both eyes in the same direction. (absoluteastronomy.com)
Stimulus2
Spiking activity along the dorsoventral axis was recorded with a laminar probe as Rhesus monkeys generated saccades to the same stimulus location in tasks that require either executive control to delay saccade onset until permission is granted or the production of an immediate response to a target whose onset is predictable. (bvsalud.org)
Stimuli vary in stimulation mode (flash vs. pattern), appearance of the stimulus (reversal vs. onset), color (black-white vs. colored), size (different check sizes), intensity and duration of flash. (wspos.org)
Vestibular1
VN, another typical variant of acute vestibular syndrome, shows mainly vestibular impairment in the horizontal and anterior SCC (as in superior VN). (frontiersin.org)
Monkeys1
We therefore compared amplitude levels and onset times of both spike bursts and LFP modulations recorded simultaneously with a laminar probe along the dorsoventral axis of SC in 3 male monkeys performing the visually guided delayed saccade task. (bvsalud.org)
Experiment3
It is based on a median nerve stimulation experiment recorded at the Montreal Neurological Institute in 2011 with a CTF MEG 275 system. (usc.edu)
Two experiments were conducted with different stimulation conditions: the first experiment ( n = 12) had only one stimulation condition (bilateral stimulation), and the second experiment ( n = 45) had three stimulation conditions (bilateral, anodal unilateral, and cathodal unilateral stimulations). (mit.edu)
The second experiment was designed to confirm the results of the first experiment and to further investigate the effects of anodal and cathodal stimulations alone in the observed effects. (mit.edu)
Recordings1
The sample dataset contains 6 minutes of recordings at 1200Hz for one subject and includes 100 stimulations of each arm. (usc.edu)
Parkinson's1
Additionally, patients with Parkinson's disease, a basal ganglia deficit, show slower saccade adaptation than age matched controls. (eneuro.org)
Posterior2
Pathological vHIT findings (low vestibulo-ocular reflex gain and re-fixation saccade), which mainly affected the posterior SCC, were more common in the s-BPPV group than in the i-BPPV group (41.9 and 0%, respectively). (frontiersin.org)
Furthermore, patients with s-BPPV showed lower vHIT gains of the posterior and horizontal SCCs in affected ears than in unaffected ears. (frontiersin.org)
Responses2
Our results showed that anodal stimulation of the PMC biases participants' responses toward using the contralateral hand whereas cathodal stimulation biases responses toward the ipsilateral hand. (mit.edu)
Brain stimulation also modulated the RT of the left hand in all stimulation conditions: Responses were faster when the response bias was in favor of the left hand and slower when the response bias was against it. (mit.edu)
Findings1
We propose two possible explanations for these findings: the perceptual bias account (bottom-up effects of stimulation on perception) and the motor-choice bias account (top-down modulation of the decision-making system by facilitation of response in one hand over the other). (mit.edu)
Brain1
The majority of these problems do improve if the Parkinsons is treated with medication or even brain stimulation. (parkinsonsinfoclub.com)
Spatial3
The present study now aims to compare vertical and horizontal spatial associations in mental arithmetic. (researchgate.net)
The analysis of the problem solving performances revealed a motion-arithmetic compatibility effect for spatial actions along both the horizontal and vertical axes. (researchgate.net)
Here, we tracked FEF spatial codes through time using a novel analytic method applied to the classic memory-delay saccade task. (eneuro.org)
Visual3
The electric response evoked in the cerebral cortex by visual stimulation or stimulation of the visual pathways. (lookformedical.com)
and second, there is an established behavioral paradigm that causes an adaptation of saccade size by providing an apparent visual error ( McLaughlin, 1967 ). (eneuro.org)
Visual electrophysiology consists of a range of investigations that record bioelectrical activity elicited by visual stimulation. (wspos.org)
Contrast1
In contrast, substantial intracollicular processing likely results in a saccade-related spike burst that leads LFP modulation. (bvsalud.org)
Participants1
Participants were asked to classify rectangles with different height-to-width ratios into horizontal and vertical rectangles using their right and left index fingers while their PMC was stimulated either bilaterally or unilaterally. (mit.edu)
Frequency1
Sixteen stimulation wave forms are available, including various sinewave forms, multi-frequency, speed step and sudden stop tests. (inventis.it)
Response1
Upturning of the big toe (and sometimes fanning of the other toes) in response to stimulation of the sole of the foot. (nih.gov)
Make2
Error-based motor learning, such as learning to use a robotic arm or make accurate saccades, has been regarded as a cerebellar function. (eneuro.org)
Since the dark trough and light rise occurs around 8 minutes after a change in light adaption a subject is required to make reproducible saccades for 10-15 minutes in the dark followed by 10-15 minutes in the light. (wspos.org)
Includes1
It includes electric stimulation of nerves or muscles, passage of current into the body, or use of interrupted current of low intensity to raise the threshold of the skin to pain. (lookformedical.com)
Hand2
On the other hand, the kinematics of corrective saccades, which represent error processing, were changed after the inactivation. (eneuro.org)
We aimed to investigate whether the transcranial direct current stimulation (tDCS) of this area can modulate hand choice. (mit.edu)
Tests1
however, it only tests one of the three semicircular canals: the horizontal canal. (wikipedia.org)
Function1
However, learning to use a robotic arm and saccade adaptation, which use error-based learning, are facilitated by motivation, which is a function of the basal ganglia. (eneuro.org)
Time1
The frontal eye fields (FEFs) participate in both working memory and sensorimotor transformations for saccades, but their role in integrating these functions through time remains unclear. (eneuro.org)