1.
Acta Neurol Scand
; 70(4): 285-98, 1984 Oct.
Article
in English
| MEDLINE
| ID: mdl-6507038
ABSTRACT
Long-term cognitive sequelae of severe closed head injury were studied in a consecutive series of 39 young head-injury adults without gross intellectual deficits. Testing was carried out 2-5 years post-injury. Patients with a post-traumatic amnesia (PTA) greater than 3 weeks were impaired on a wide range of tests, particularly those requiring long-term retention of complex materials or where time constraints were a salient feature. Patients with a PTA of 1-3 weeks were unimpaired on all tasks. The results suggest that in young adults a threshold of brain damage related to long-term cognitive impairment operates at around a 2-3 week PTA duration.