Abstract:
BACKGROUND:Saccades are essential for optimal visual function. Chiari type II malformation (CII) is a congenital anomaly of the cerebellum and brainstem, associated with spina bifida. OBJECTIVE:To investigate the effects of CII on saccades and correlate saccadic parameters with brain MRI measurements. METHODS:Saccades were recorded in 21 participants with CII, aged 8 to 19, using an infrared eye tracker. Thirty-nine typically developing children served as controls. Participants made saccades to horizontal and vertical target steps. Nineteen participants with CII had MRI. Regression analyses were used to investigate the effects of spinal lesion level, number of shunt revisions, presence of nystagmus, and midsagittal MRI measurements on saccades. RESULTS:Saccadic amplitude gains, asymptotic peak velocities, and latencies did not differ between the control and CII groups (p > 0.01). No significant differences were found between saccadic gains, asymptotic peak velocities or latencies, and spinal lesion level, number of shunt revisions, presence of nystagmus, or MRI measurements. CONCLUSIONS:Saccades were normal in most participants with Chiari II malformation (CII). Neural coding of saccades is robust and is typically not affected by the anatomic deformity of CII.
journal_name
Neurologyjournal_title
Neurologyauthors
Salman MS,Sharpe JA,Eizenman M,Lillakas L,To T,Westall C,Steinbach MJ,Dennis Mdoi
10.1212/01.WNL.0000166034.71337.5Esubject
Has Abstractpub_date
2005-06-28 00:00:00pages
2098-101issue
12eissn
0028-3878issn
1526-632Xpii
64/12/2098journal_volume
64pub_type
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