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P.034 Eye movement assessment and diffusion tensor imaging in patients with post concussion syndrome

Published online by Cambridge University Press:  17 June 2016

F Taghdiri
Affiliation:
(Toronto)
SL Irwin
Affiliation:
(Toronto)
N Multani
Affiliation:
(Toronto)
M Eizenman
Affiliation:
(Toronto)
A Tarazi
Affiliation:
(Toronto)
A Ebraheem
Affiliation:
(Toronto)
J Chung
Affiliation:
(Toronto)
M Khodadadi
Affiliation:
(Toronto)
R Goswami
Affiliation:
(Toronto)
R Wennberg
Affiliation:
(Toronto)
R Green
Affiliation:
(Toronto)
D Mikulis
Affiliation:
(Toronto)
C Tator
Affiliation:
(Toronto)
MC Tartaglia
Affiliation:
(Toronto)
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Abstract

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Background: Post concussion syndrome (PCS) can affect up to 30% of patients with concussion. Biomarkers of this condition would be beneficial for diagnosis and management. We hypothesized that eye tracking parameters would correlate with microstructural changes of white matter integrity, as measured by diffusion tensor imaging (DTI), in patients with PCS. Methods: Sixty patients with PCS and at least 2 concussions participated in our prospective study. Attention and executive function were tested using Visual Attention Scanning Technology (VAST). In a matching task, the normalized number of visits to master image before making the first selection is used as a surrogate of working memory. We related performance on VAST to white matter integrity using Tract-Based Spatial Statistics of diffusion tensor imaging data. Results: 60 participants (mean age 34.3 years, SD 13.8) had a mean of 4 concussions. There were negative correlations between fractional anisotropy (FA) of the genu, body, and splenium of the corpus callosum and normalized number of visits to master image before first selection (r=-0.432, p=0.001; r=-0.504, p<0.001; and r=-0.388, p=0.002; respectively). A negative correlation was also seen between right cingulum FA and the global processing index (r=-0.349, p=0.006). Conclusions: Impaired performance on eye tracking measures of attention and executive function may reflect alterations in white matter tracts.

Type
Poster Presentations
Copyright
Copyright © The Canadian Journal of Neurological Sciences Inc. 2016