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Updated: Jul 17, 2026

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Investigations on Alterations of Hippocampal Circuit Function Following Mild Traumatic Brain Injury
Published on: November 19, 2012
Length of retrograde amnesia after head injury: a revised formula
1Veterans Administration Medical Center, Durham, N.C.
Abstract:
Our earlier retrospective study presented a formula relating lengths of retrograde amnesia to length of post-traumatic amnesia (PTA) and length of time since injury (Crovitz, Horn and Daniel, 1983). The earlier study derived the formula from 27 cases with retrograde amnesia. The present study adds another 75 cases, and we discuss similarities and differences between the two samples.
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