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Definition. Horizontal Nystagmus: Horizontal nystagmus is a medical term used to denote involuntary, rapid, and repetitive movements of the eyeball in a horizontal position. Vertical Nystagmus: Vertical nystagmus is a medical term used to denote involuntary, rapid, and repetitive vertical movements of the eyeball.
Oct 4, 2023 · Nystagmus (pronounced “ni-STAG-muhs”) is a condition where your eyes make rapid, repetitive, uncontrolled movements. Your eyes may move in different directions: Side to side (horizontal nystagmus). Up and down (vertical nystagmus). In a circle (rotary or torsional nystagmus). The movements can follow different patterns. Your eyes may:
Apr 5, 2024 · Nystagmus is an involuntary, rapid and repetitive movement of the eyes — either horizontal (side-to-side), vertical (up and down) or rotary (circular).
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.
Feb 27, 2023 · Optokinetic or pendular nystagmus- multi-direction (e.g.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.
Nov 3, 2022 · Nystagmus is a rhythmic regular oscillation of the eyes. It may consist of alternating phases of a slow drift in one direction with a corrective quick "jerk" in the opposite direction, or of slow, sinusoidal, "pendular" oscillations to and fro. Jerk nystagmus is more common than pendular nystagmus.
May 4, 2005 · When present in the straight-ahead position of gaze (i.e. the primary position) it is referred to as ‘upbeat nystagmus’ (UBN) or ‘downbeat nystagmus’ (DBN) ( Leigh and Zee, 1999 ). DBN is usually greater on looking laterally or in downgaze, whereas UBN often increases on upgaze.
