seesaw nystagmus

WordNet

move up and down as if on a seesaw
a plaything consisting of a board balanced on a fulcrum; the board is ridden up and down by children at either end (同)teeter, teeter-totter, teetertotter, teeterboard, tilting board, dandle board
involuntary movements of the eyeballs; its presence or absence is used to diagnose a variety of neurological and visual disorders

(また『teeter-totter』)〈C〉シーソー;〈U〉シーソー遊び / 〈U〉変動;(戦闘・ゲームなどの)一進一退 / シーソー遊びをする;上下(前後)に動く;(両者の間で)変動する

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Autopsy confirmed multiple system atrophy cases: Mayo experience and role of autonomic function tests.

Iodice V, Lipp A, Ahlskog JE, Sandroni P, Fealey RD, Parisi JE, Matsumoto JY, Benarroch EE, Kimpinski K, Singer W, Gehrking TL, Gehrking JA, Sletten DM, Schmeichel AM, Bower JH, Gilman S, Figueroa J, Low PA.SourceNeurovascular and Autonomic Medicine Unit, Imperial College London, UK.
Journal of neurology, neurosurgery, and psychiatry.J Neurol Neurosurg Psychiatry.2012 Apr;83(4):453-9. Epub 2012 Jan 6.
BACKGROUND: Multiple system atrophy (MSA) is a sporadic progressive neurodegenerative disorder characterised by autonomic failure, manifested as orthostatic hypotension or urogenital dysfunction, with combinations of parkinsonism that is poorly responsive to levodopa, cerebellar ataxia and corticosp
PMID 22228725

Extraocular muscles in patients with infantile nystagmus: adaptations at the effector level.

Berg KT, Hunter DG, Bothun ED, Antunes-Foschini R, McLoon LK.SourceDepartment of Ophthalmology, University of Minnesota, Minneapolis, MN 55455, USA.
Archives of ophthalmology.Arch Ophthalmol.2012 Mar;130(3):343-9.
OBJECTIVE: To test the hypothesis that the extraocular muscles (EOMs) of patients with infantile nystagmus have muscular and innervational adaptations that may have a role in the involuntary oscillations of the eyes.METHODS: Specimens of EOMs from 10 patients with infantile nystagmus and postmortem
PMID 22411664