Saccades in children with spina bifida and Chiari type II malformation.

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

Neurology

journal_title

Neurology

authors

Salman MS,Sharpe JA,Eizenman M,Lillakas L,To T,Westall C,Steinbach MJ,Dennis M

doi

10.1212/01.WNL.0000166034.71337.5E

subject

Has Abstract

pub_date

2005-06-28 00:00:00

pages

2098-101

issue

12

eissn

0028-3878

issn

1526-632X

pii

64/12/2098

journal_volume

64

pub_type

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