nystagmus

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nys·tag·mus

 (nĭ-stăg′məs)
n.
A rapid, involuntary, oscillatory motion of the eyeball.

[New Latin, from Greek nustagmos, drowsiness.]

nys·tag′mic (-mĭk) adj.

nystagmus

(nɪˈstæɡməs)
n
(Medicine) involuntary movement of the eye comprising a smooth drift followed by a flick back, occurring in several situations, for example after the body has been rotated or in disorders of the cerebellum
[C19: New Latin, from Greek nustagmos]

nys•tag•mus

(nɪˈstæg məs)

n.
a persistent, rapid, involuntary side-to-side eye movement.
[1815–25; < New Latin < Greek nystagmós nodding, derivative of nystázein to nod]
nys•tag′mic, adj.

nystagmus

uncontrollable and rapid movement of the eyeball in any direction. — nystagmic, adj.
See also: Eyes
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.nystagmus - involuntary movements of the eyeballs; its presence or absence is used to diagnose a variety of neurological and visual disorders
eye movement - the movement of the eyes
physiological nystagmus - small involuntary tremors of the eyeballs; when it is eliminated by stabilizing the image on the retina, visual perception fades rapidly from fatigue of the retinal receptors
rotational nystagmus - nystagmus caused by the body rotating rapidly; large slow movements of the eyeballs are in the direction of rotation
post-rotational nystagmus - nystagmus caused by suddenly stopping the rapid rotation of the body; large slow movements of the eyeballs are in the direction opposite to the direction of rotation
Translations
nystagmus

nys·tag·mus

n. nistagmo, espasmo involuntario del globo ocular;
palatal ______ palatal.

nystagmus

n nistagmo
References in periodicals archive ?
She had no spontaneous nystagmus. Romberg and Fukuda stepping tests were all abnormal.
Firstly, regular calibration and absence of spontaneous and semi spontaneous nystagmus with open and closed eyes were observed, to exclude the presence of primary vestibular pathology.
To determine the localising value of spontaneous nystagmus, gaze nystagmus and positional nystagmus.
On infrared videonistagmoscopy (ICS Chartr 200; Otometrics, Taastrup, Denmark), a low-amplitude horizontal, left-beating spontaneous nystagmus was noted with positional geotropic increase.
Videonystagmography was normal and revealed no spontaneous nystagmus. The Dix-Hallpike test and roll test were negative as was head-shaking test.
Magnavita, "Primary downbeat spontaneous nystagmus and severe Hypomagnesemia," Monitoring and Follow-Up, vol.
Another two cases suffered from evoked positional nystagmus, of whom one had rightward horizontal spontaneous nystagmus, with normal electronystagmograms though.
There are several different types of pathological, acquired nystagmus, of which the most common are spontaneous nystagmus (with or without fixation), positional or positioning nystagmus (occurring with or after head or body movement), gaze-evoked nystagmus (only present in specific eccentric eye gaze positions), optokinetic nystagmus (only abnormal with lowered velocity of eye movements), pendular nystagmus (independent eyeball motion with vertical, horizontal and torsional nystagmus), seesaw nystagmus (alternating elevation and intorsion of one eye and simultaneous depression and extorsion of the other), and periodic alternating nystagmus, which is a strictly horizontal nystagmus that predictably oscillates in direction, amplitude and frequency.
A repeated VNG exam showed spontaneous nystagmus towards the left, with a slow phase velocity (SPV) of 7[degrees]/sec.
The test battery including spontaneous nystagmus, head-shaking nystagmus, and the Head Impulse Test could predict a results on caloric testing with sensitivity of 63.6% and specificity of 85.4%.
Spontaneous nystagmus was present bilaterally in horizontal direction.

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