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Updated: Aug 18, 2026

Investigations on Alterations of Hippocampal Circuit Function Following Mild Traumatic Brain Injury
Published on: November 19, 2012
Does brief loss of consciousness affect cognitive functioning after mild head injury?
G L Iverson1, M R Lovell, S S Smith
1University of British Columbia and Riverview Hospital.
Abstract:
Loss of consciousness often is considered an important variable when estimating head injury severity. The purpose of this study was to determine if brief loss of consciousness had any effect on the neuropsychological test performance of patients in acute recovery from an uncomplicated mild head injury (N = 195). Three groups of 65 patients were given a brief battery of neuropsychological tests within one week of sustaining a mild head injury. The groups, sorted on the basis of loss of consciousness (i.e., positive, negative, or equivocal), did not differ in age or education. There were no significant differences among the groups on any of the measures of attention, learning, memory, language, or executive functioning.
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