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Measurement of Peripheral Vision Reaction Time Identifies White Matter Disruption in Patients with Mild Traumatic Brain Injury.
- Source :
-
Journal of neurotrauma [J Neurotrauma] 2017 Apr 15; Vol. 34 (8), pp. 1539-1545. Date of Electronic Publication: 2017 Jan 13. - Publication Year :
- 2017
-
Abstract
- This study examined whether peripheral vision reaction time (PVRT) in patients with mild traumatic brain injury (mTBI) correlated with white matter abnormalities in centroaxial structures and impairments in neuropsychological testing. Within 24 h after mTBI, crossed reaction times (CRT), uncrossed reaction times (URT), and crossed-uncrossed difference (CUD) were measured in 23 patients using a laptop computer that displayed visual stimuli predominantly to either the left or the right visual field of the retina. The CUD is a surrogate marker of the interhemispheric transfer time (ITT). Within 7 days after the injury, patients received a diffusion tensor-MRI (DTI) scan and a battery of neuropsychological tests. Nine uninjured control subjects received similar testing. Patients 18-50 years of age were included if they had a post-resuscitation Glasgow Coma Scale >13 and an injury mechanism compatible with mTBI. Healthy controls were either age- and gender-matched family members of the TBI patients or healthy volunteers. CUD deficits >2 standard deviations (SD) were seen in 40.9% of patients. The CUD of injured patients correlated with mean diffusivity (MD) (p < 0.001, ρ = -0.811) in the posterior corpus callosum. Patients could be stratified on the basis of CUD on the Stroop 1, Controlled Oral Word Association Test (COWAT), and the obsessive-compulsive component of the Basic Symptom Inventory tests. These studies suggest that the PVRT indirectly measures white matter integrity in the posterior corpus callosum, a brain region frequently damaged by mTBI.
- Subjects :
- Adolescent
Adult
Brain Concussion complications
Cognitive Dysfunction etiology
Diffusion Tensor Imaging
Female
Glasgow Coma Scale
Humans
Male
Middle Aged
Reaction Time physiology
Vision Disorders etiology
Visual Field Tests
Young Adult
Brain Concussion diagnostic imaging
Brain Concussion physiopathology
Cognitive Dysfunction physiopathology
Corpus Callosum diagnostic imaging
Psychomotor Performance physiology
Vision Disorders physiopathology
Visual Perception physiology
White Matter diagnostic imaging
Subjects
Details
- Language :
- English
- ISSN :
- 1557-9042
- Volume :
- 34
- Issue :
- 8
- Database :
- MEDLINE
- Journal :
- Journal of neurotrauma
- Publication Type :
- Academic Journal
- Accession number :
- 27927083
- Full Text :
- https://doi.org/10.1089/neu.2016.4670