Nystagmus
41lateral nystagmus — nystagmus in which the eye movements are from side to side …
42positional nystagmus — nystagmus that occurs, or changes its form or intensity, when a person puts the head into specific positions …
43retraction nystagmus — nystagmus retractorius 1. a spasmodic retraction of the eyeball backward into the orbit, occurring on attempted movement of the eye; it is a sign of disease of the midbrain. 2. sylvian syndrome; see under syndrome …
44rotatory nystagmus — nystagmus in which the movement is about the visual axis …
45secondary nystagmus — nystagmus seen after abrupt cessation of rotation of the head, caused by the labyrinthine fluid continuing to move …
46see-saw nystagmus — nystagmus in which one eye moves up as the other moves down …
47spontaneous nystagmus — nystagmus that does not have specific stimulation of the vestibular system …
48unilateral nystagmus — nystagmus in only one eye …
49vestibular nystagmus — nystagmus due to disturbance of the vestibular system; eye movements are rhythmic, with a slow and a fast component. Called also aural n. and labyrinthine n. Cf. vestibular vertigo …
50nystagmus test — caloric t …