What causes ocular flutter?

What causes ocular flutter?

Ocular flutter is a disorder characterized by intermittent bursts of conjugate horizontal saccades without intersaccadic interval, probably caused by dysfunction of omnipause neurons in the para- median pontine reticular formation.

What are Microsaccades caused by?

They are small, jerk-like, involuntary eye movements, similar to miniature versions of voluntary saccades. They typically occur during prolonged visual fixation (of at least several seconds), not only in humans, but also in animals with foveal vision (primates, cats, dogs etc.).

What is opsoclonus myoclonus?

Opsoclonus-myoclonus-ataxia syndrome (often referred to as OMAS or opsoclonus-myoclonus syndrome) is an autoimmune disorder of the nervous system characterized by new movements of the limbs and eyes, abnormal behaviors, sleep dysregulation, and difficulty talking.

What is the difference between saccades and microsaccades?

While saccades are typically assumed to represent voluntary motor actions, microsaccades are considered as involuntary events (Yarbus, 1967).

What role do microsaccades play in illusions?

Microsaccades are small-magnitude involuntary saccades that occur during fixation (27–29). These small eye movements generate strong neural transients in the early visual system (27, 30, 31), counteract visual fading during fixation (32) and prevent filling-in of artificial scotomas (33).

Can Opsoclonus be intermittent?

The clinician may miss the diagnosis because opsoclonus in OMAS may be intermittent, subtle, or later appearing. Gait ataxia, tantrums, hypotonia, and varied other signs including reflex abnormalities and head tilt have been described in OMAS.

What is saccadic intrusion?

Saccadic intrusions or oscillations: These saccades occur when patients are fixating in the eye primary position, or they may be superimposed during smooth pursuit. Examples include square wave jerks, macrosaccadic oscillations and ocular flutter/opsoclonus.