Pendular nystagmus is a sinusoidal oscillation. The waveform of pendular nystagmus may occur in any direction; it can be torsional, horizontal, vertical, or a combination of these, resulting in circular, oblique, or elliptical trajectories.

2022年8月1日 · 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 is composed entirely of slow eye movements.

Seesaw nystagmus, a subtype of torsional nystagmus, is descriptively named for the pendular, disconjugate movement of eyes in which one elevates/intorts while the fellow eye depresses/extorts. Hemi-seesaw nystagmus is similar but …

2023年10月4日 · Drift back and forth in a steady, pendulum-like motion (pendular nystagmus). These eye movements can cause problems with vision, depth perception, balance and coordination. Nystagmus affects both children and adults.

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.

What causes Nystagmus? Jerk nystagmus is usually caused by diseases affecting the inner ear balance mechanisms or the brain’s movement regions (brainstem or cerebellum). Pendular nystagmus can be caused by brain diseases such as multiple sclerosis, but it can be a congenital problem as well.

2023年2月27日 · Optokinetic or pendular nystagmus: multi-direction (eg vertical, torsional, or horizontal) nystagmus in response to moving or rotating visual fields or objects, the slow phase is ipsilateral to the visual stimuli, and it does not have a fast phase.

The periodicity of the nystagmus is likely to arise from instability in a certain type(s) of neurone, for the associated somatic tremors have similar characteristics and yet involve very different neuronal muscular circuitry. Prognosis for cessation of the nystagmus is poor.

2022年7月3日 · Acquired pendular nystagmus (APN) is a back and forth, oscillatory eye movement in which the 2 oppositely directed slow phases have similar waveforms. APN occurs commonly in multiple sclerosis and causes a disabling oscillopsia that impairs vision.

Optokinetic nystagmus may be altered in CNS syndromes and in vestibular dysfunction 1. The aim of this study was to define whether fixed and randomized saccadic movement, pendular tracking and optokinetic nystagmus parameters were altered on digital vectonystagmography in patients with a diagnostic hypothesis of peripheral vestibular dysfunction.