Increased oculomotor deficits during target blanking as an indicator of mild traumatic brain injury
| Autor: | Ranjeeta Sarkar, Sambrita Basu, Minah Suh, Bruce D. McCandliss, Rachel Kolster, Jamshid Ghajar |
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| Rok vydání: | 2006 |
| Předmět: |
Adult
Male medicine.medical_specialty Time Factors Adolescent genetic structures Traumatic brain injury Poison control Neuropsychological Tests Audiology Smooth pursuit Ocular Motility Disorders Predictive Value of Tests Reaction Time Saccades medicine Humans Glasgow Coma Scale California Verbal Learning Test Working memory General Neuroscience Cognitive disorder Eye movement Cognition Middle Aged medicine.disease Brain Injuries Case-Control Studies Female Cognition Disorders Psychology Neuroscience Photic Stimulation |
| Zdroj: | Neuroscience Letters. 410:203-207 |
| ISSN: | 0304-3940 |
| DOI: | 10.1016/j.neulet.2006.10.001 |
| Popis: | Given the susceptibility of cerebellar-cortical tracts to shearing injury from traumatic brain injury (TBI), we investigated impairment in the generation of predictive eye movements and its relationship to cognitive deficits in mild TBI patients using a smooth pursuit target-blanking paradigm. Compared to a target-tracking paradigm without blanking, this paradigm more greatly necessitates the generation of predictive eye movements, which are subserved by brain regions involved in cognitive processing. Mild TBI patients showed impaired prediction of target trajectories during target blanking, demonstrated by generation of saccades at earlier and more variable time points, as well as greater and more variable oculomotor error compared to controls. In addition, California Verbal Learning Test (CVLT-II) scores related to working memory, learning, and executive function were more highly correlated with oculomotor variability during target blanking than during target tracking. Our results suggest that a disruption of cerebellar-cortical connections in TBI may account for both oculomotor and cognitive impairment, and that measures of predictive eye movements during target blanking may be a sensitive metric of cognitive deficits after mild TBI. |
| Databáze: | OpenAIRE |
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