title: Antisaccadic Eye Movements Are Correlated with Corpus Callosum White Matter Mean Diffusivity, Stroop Performance, and Symptom Burden in Mild Traumatic Brain Injury and Concussion.
abstract: Antisaccades are thought to involve higher level inputs from neural centers involved in rapid eye movement inhibition and control. Previous work has demonstrated that performance on the antisaccade task can help in the assessment of injury in acute and/or chronic mild traumatic brain injury (mTBI). In this exploratory study, we performed cross-sectional and longitudinal comparisons of rapid eye movement, followed by correlations of antisaccade performance with assessments of symptom burden, diffusion tensor imaging, and a neuropsychological test of response inhibition. Significant deficits in antisaccade median latency, F(2, 31) = 3.65, p = 0.04 and prosaccade error mean duration, F(2, 31) = 3.63, p = 0.04 were found between patient groups and controls: the former was correlated with loss of white matter integrity in the splenium of the corpus callosum in acute mTBI, rho = 0.90, p = 0.0005. Furthermore, increased antisaccade median latency was also correlated with poor performance on an executive functioning task, r (2) = 0.439, p = 0.03, and greater symptom burden, r (2) = 0.480, p = 0.02 in the acute mTBI patients. Our preliminary research suggests that the antisaccade task could be useful as a neurological marker for mTBI and concussion, but more work is required.
authors.affiliation: Injury Prevention Research Office, Keenan Research Centre for Biomedical Science, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada; Neuroscience Research Program, St. Michael's Hospital, Toronto, ON, Canada.
authors.forename: Windsor Kwan-Chun
authors.initials: WK
authors.lastname: Ting
authors.affiliation: Neuroscience Research Program, St. Michael's Hospital, Toronto, ON, Canada; Department of Surgery, Division of Neurosurgery, St. Michael's Hospital, Toronto, ON, Canada.
authors.forename: Tom A
authors.initials: TA
authors.lastname: Schweizer
authors.affiliation: Neuroscience Research Program, St. Michael's Hospital, Toronto, ON, Canada; Department of Occupational Science and Occupational Therapy, University of Toronto, Toronto, ON, Canada.
authors.forename: Jane
authors.initials: J
authors.lastname: Topolovec-Vranic
authors.affiliation: Injury Prevention Research Office, Keenan Research Centre for Biomedical Science, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada; Neuroscience Research Program, St. Michael's Hospital, Toronto, ON, Canada; Department of Surgery, Division of Neurosurgery, St. Michael's Hospital, Toronto, ON, Canada.
authors.forename: Michael D
authors.initials: MD
authors.lastname: Cusimano
keywords: antisaccade; concussion; corpus callosum; diffusion tensor imaging; executive function; mild traumatic brain injury; symptom burden
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