pendular nystagmus

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Pendular nystagmus | Article about pendular …

Pendular nystagmus, a rarer, chronic form of nystagmus, can be especially disabling, because the person experiences a constantly moving environment. Living with Low Vision. Examination of both eyes showed full extraocular movement with pendular nystagmus in all gazes.

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Pendular nystagmus

Define pendular nystagmus. pendular nystagmus synonyms, pendular nystagmus pronunciation, pendular nystagmus translation, English dictionary definition of pendular nystagmus. n. A rapid, involuntary, oscillatory motion of the eyeball. nys·tag′mic adj. American Heritage® Dictionary of the English Language, Fifth Edition.

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Moran CORE | Monocular Pendular Nystagmus

Title: Monocular Pendular Nystagmus Author: Kathleen B. Digre, M.D., Professor of Ophthalmology and Neurology, Director of Neuro-Ophthalmology, Moran Eye Center, University of Utah School of Medicine Date: 03/03/2015 Keywords/Main Subjects: Pendular nystagmus; Monocular pendular nystagmus; Acquired nystagmus; Multiple sclerosis

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Nystagmus

Nystagmus is defined by rhythmic, abnormal eye movements with a "slow" eye movement driving the eye off the target followed by a second movement that brings the eye back to the target.The movement can be horizontal, vertical, torsional or a combination of these movements. Nystagmus can be jerk (named for fast phase) or pendular, variable amplitude and frequency, and can be worsened or improved ...

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Pendular Nystagmus in Patients With Peroxisomal …

In adults, acquired pendular nystagmus may be reduced or abolished by the use of gabapentin. 16 The mechanism of action of gabapentin in pendular nystagmus remains uncertain, although γ-aminobutyric acid is known to be important in brainstem and …

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Vertical or asymmetric nystagmus need not imply ...

2021-7-2 · Vertical nystagmus may be pendular, downbeat, or upbeat, or all waveforms may occur in the same subject depending on gaze direction. Vertical pendular nystagmus has characteristics similar to other acquired pendular nystagmus and is often of high frequency and low amplitude. It is associated with a wide range of brainstem and cerebellar disease.

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Acquired pendular nystagmus

Acquired pendular nystagmus is comprised of quasi-sinusoidal oscillations of the eyes significantly affecting gaze holding and clarity of vision. The most common causes of acquired pendular nystagmus include demyelinating disorders such as multiple sclerosis and the syndrome of ocular palatal tremor …. Acquired pendular nystagmus is comprised of ...

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Treatment of Pendular Nystagmus With Gabapentin …

2012-12-6 · Treatment of Pendular Nystagmus With Gabapentin and Memantine in Patients With Multiple Sclerosis. The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government.

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Treatment of Pendular Nystagmus in OPT

2015-6-9 · Pendular nystagmus corresponds to an enduring to and fro eye oscillation without resetting quick phases. The most common causes of acquired pendular nystagmus (APN) are multiple sclerosis (MS) and focal brainstem lesions (oculopalatal tremor, OPT). Based on pathophysiological hypothesis, pharmacological treatments of acquired nystagmus have ...

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Acquired pendular nystagmus

2017-4-15 · Pendular nystagmus due to an acquired etiology, the focus of the current review, is described by its frequency, given in Hertz, and its amplitude, given in degrees. Other properties include the axis of movement, which may be horizontal, vertical or torsional, whether the movement is monocular or binocular, and conjugate (in which both eyes move ...

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UpToDate

What is Pendular Nystagmus? (with pictures)

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Pendular Nystagmus | SpringerLink

Nystagmus with a quasi-sinusoidal waveform (as opposed to "saw tooth" or "jerk" nystagmus in which there is alternation of slow and fast phases of nystagmus. Central Vestibular Disorders Nystagmus

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Unilateral vertical pendular nystagmus in multiple ...

Nystagmus is to-and-fro biphasic ocular oscillations. It can be jerk nystagmus where there is a slow drift of eyes and a quick corrective component, or pendular nystagmus, where eyes move with the same speed in both directions.

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Pendular nystagmus | physiology | Britannica

One type of nystagmus, called pendular nystagmus, is characterized by even, smooth eye movements, whereas in the type referred to as jerk nystagmus the movements are sharper and quicker in one direction than in the other. Jerk nystagmus can occur normally, …

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Pendular nystagmus | physiology | Britannica

Other articles where Pendular nystagmus is discussed: nystagmus: One type of nystagmus, called pendular nystagmus, is characterized by even, smooth eye movements, whereas in the type referred to as jerk nystagmus the movements are sharper and quicker in one direction than in the other. Jerk nystagmus can occur normally, such as when one is dizzy (e.g., from spinning…

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Acquired pendular nystagmus: its characteristics ...

It is inferred that the mechanism responsible for the pendular nystagmus lies at a level which is close to the oculomotor nuclei so that it can have monocular effects but is not part of the primary motor pathways. It is possible that this mechanism normally subserves …

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Pendular Nystagmus; Horizontal Gaze Palsy | Eccles …

Ocular motility examination: Conjugate horizontal pendular nystagmus Absent horizontal gaze (saccadic and pursuit eye movements) Absent horizontal vestibular ocular reflex Absent optokinetic nystagmus (OKN) Normal vertical gaze Preservation of convergence Neurological examination: Normal. Congenital horizontal gaze palsy (HGP) is one of several ...

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Pendular Nystagmus Medical Definition | Merriam …

Medical Definition of pendular nystagmus : nystagmus marked by rhythmic side-to-side or up-and-down movements of constant speed Learn More About pendular nystagmus

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The pharmacological treatment of acquired …

The antituberculous drug, isoniazid, can also help acquired pendular nystagmus, 14 probably through inhibiting pyridoxal kinase, important in the GABA synthesis pathway. The increasing use of gabapentin to treat many neurological illnesses encouraged the formal study of GABAergic drugs in treating acquired nystagmus.

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pendular-nystagmus、_

2021-3-30 · pendular-nystagmus,pendular-nystagmus : ;; Acquired pendular nystagmus occurs mainly in multiple sclerosis (MS) and focal brainstem lesions.

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Acquired pendular nystagmus

2017-4-15 · Pendular nystagmus is characterized by quasi-sinusoidal oscillations of the eyes disrupting visual acuity and causing oscillopsia. This review will provide a comprehensive resource for the pathophysiology, differential diagnosis and pharmacotherapy of pendular nystagmus …

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UpToDate

2018-12-6 · Acquired pendular nystagmus: its characteristics, localising value and pathophysiology. J Neurol Neurosurg Psychiatry 1982; 45:431. Tilikete C, Jasse L, Pelisson D, et al. Acquired pendular nystagmus in multiple sclerosis and oculopalatal tremor. Neurology ...

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Pendular nystagmus associated with venlafaxine …

2021-6-30 · Pendular nystagmus is an involuntary oscillation of the eyes that occurs with a sinusoidal waveform, unlike jerk nystagmus which displays a fast and slow phase. Numerous causes have been described,3 and an association of binocular horizontal pendular nystagmus with serotonin toxicity is well recognised2, 4; although in much of the literature ...

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Nystagmus

pendular nystagmus. The direction of torsional nystagmus is conventionally that of the shoulder towards which the fast phases beat. Figure 1 The various waveforms of nystagmus and saccadic disorders. The clinician should be able to distinguish jerk ny stagmus from pendular and complex varieties, but

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Pendular nystagmus and vision loss | Eccles Health ...

Three patients are presented here, each with poor vision (counting fingers or worse) related to retinitis pigmentosa in one patient (Usher''s syndrome) and optic neuropathy in two patients, each of whom developed pendular nystagmus after vision loss developed. Visually mediated movements normally prevent the eyes from drifting away from a target, and afferent inputs are needed to calibrate eye ...

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Convergent-Divergent Pendular Nystagmus | Neurology

1995-3-1 · Article abstract-We used the magnetic search coil technique to measure horizontal, vertical, and torsional components of convergent-divergent pendular nystagmus in three patients. All showed phase shifts of approximately 180 degrees between the two eyes in the horizontal and torsional planes, but the vertical components were conjugate. Viewing a near target increased the oscillations threefold ...

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Pendular nystagmus | definition of pendular …

pendular nystagmus nystagmus in which the oscillations of the eyes have an equal rate, amplitude, direction, and type of movement. positional nystagmus that which occurs, or is altered in form or intensity, on assumption of certain positions of the head.

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Pendular Nystagmus Medical Definition | Merriam …

Medical definition of pendular nystagmus: nystagmus marked by rhythmic side-to-side or up-and-down movements of constant speed.

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[PDF] Acquired pendular nystagmus: its characteristics ...

Investigations were made of 16 patients with acquired pendular nystagmus and a further 32 cases reported in the literature were reviewed. Amongst our own patients two thirds had multiple sclerosis, almost one third a cerebrovascular accident or angioma and two had optic atrophy with squint. The nystagmus took forms which could be monocular or binocular, conjugate or disconjugate and could ...

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PULSE-SYNCHRONOUS TORSIONAL PENDULAR …

2008-4-1 · A physically active 62-year-old man experienced the gradual onset of intermittent positional dizziness, occurring primarily on inclining his head upwards or downwards. Dizziness also appeared less commonly with abrupt turns of the head or while bearing down during a bowel movement. He denied tinnitus. He had no significant family history, he had never sustained head or neck trauma, and he was ...

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Pendular nystagmus (Concept Id: C0271388)

Leber congenital amaurosis comprises a group of early-onset childhood retinal dystrophies characterized by vision loss, nystagmus, and severe retinal dysfunction. Patients usually present at birth with profound vision loss and pendular nystagmus. Electroretinogram (ERG) responses are usually nonrecordable.

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Pendular Nystagmus

2021-3-7 · Pendular nystagmus refers to the waveform of an involuntary eye movement. In pendular nystagmus the eye moves in sinusoidal trajectory, similar to that of a pendulum. Pendular nystagmus generally does not have a "fast phase" including a saccade, but …

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