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. 2018 Jan 22;75(4):495–502. doi: 10.1001/jamaneurol.2017.4373

Video 1. Patient 72.

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The patient was homozygous for the Ala198Val mutation in the APTX gene at 28 years of age. Dysmetria during the finger-nose test and oculocephalic dissociation (dissociation of eyes-head when looking toward a lateral target) with hypometric saccades during the head movement task were noted.