Table of Contents
What does a horizontal nystagmus mean?
Nystagmus is defined as an involuntary 'to and fro' movement of the eyes in a horizontal, vertical, rotatory or mixed direction.
What is vertical nystagmus?
Upbeat nystagmus may occur due to the disruption of the pathways involved in the upward vestibulo-ocular reflex (VOR) from the anterior semicircular canals to the ocular motor nuclei, or due to dysfunction of the neural integrator that is involved in vertical gaze holding.
How would you describe nystagmus?
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.