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spasmus nutans spasmus [spaz´mus] (L.) spasm.spasmus nu´tans nodding spasm.spas·mus nu·'tans1. Synonym(s): nodding spasm2. a fine nystagmus, sometimes rotary, sometimes monocular, associated with head-nodding movements; appears in patients aged between 6 months and 3 years. spasmus nutans Neurology A self-limiting acquired nystagmus characterized by a triad: horizontal or pendular nystagmus, head nodding, head tilting; SN may last months to yrs and be associated with optic gliomas and other brain tumorsspas·mus nu·tans (spaz'mŭs nū'tanz) Head nodding and head turn with vertical, horizontal, or torsional nystagmus; appears in patients aged between 6 months and 3 years. spasmus nutans A pendular, rapid nystagmus of small amplitude which presents in infancy. It is generally bilateral, although asymmetrical and horizontal in most cases. Rotary and vertical types have been reported. The condition is associated with head nodding and less frequently with torticollis. The cause is unknown and the condition subsides spontaneously in early childhood. It must be differentiated from other disorders, such as congenital nystagmus and intracranial tumours, which also result in head nodding, and nystagmus.spas·mus nu·tans (spaz'mŭs nū'tanz) Fine nystagmus, sometimes rotary, sometimes monocular, associated with head-nodding movements; appears in patients aged between 6 months and 3 years. |