Near-evoked nystagmus in spasmus nutans.
Near-evoked nystagmus was evident in two children with spasmus nutans by clinical observation and electro-oculographic recording. In one child the nystagmus appeared to be evoked by fusional convergence and in the other by convergence-accommodation. These cases represent an atypical form of spasmus nutans in which the nystagmus is modulated by centers controlling visuomotor changes with near viewing.
D000065:Accommodation, Ocular; D002675:Child, Preschool; D003290:Convergence, Ocular; D005133:Eye Movements; D006257:Head; D006801:Humans; D008297:Male; D009069:Movement Disorders / Q000150:complications*; D009759:Nystagmus, Pathologic / Q000150:complications* / Q000209:etiology; D011187:Posture