The purpose of this study was to examine the relation between the
subjective report of feeling foggy at one-week post concussion and
acute neuropsychological outcome. The outcome variables were derived
from a computerized neuropsychological screening battery, Immediate
Post-Concussion Assessment and Cognitive Testing (ImPACT). Participants
were 110 high school students who sustained a sports-related concussion
and were evaluated 5–10 days post injury (M = 6.8 days).
Athletes were divided into two groups on the basis of self-reported
fogginess. The first group reported no fogginess (n = 91),
whereas the second group reported experiencing some degree of fogginess
(n = 19) on a 6-point scale. The athletes with persistent
fogginess experienced a large number of other post-concussion symptoms,
compared to the athletes with no reported fogginess. In addition, the
athletes with persistent fogginess had significantly slower reaction
times, reduced memory performance, and slower processing speed. Thus,
athletes with any degree of self-reported fogginess at one-week post
injury are likely to have adverse effects from their concussions in
multiple domains. (JINS, 2004, 10, 904–906.)