In comparing the patients in initial and follow - up study, the young patients had significantly reduced post-concussion symptom score at follow - up than at the time of the initial exam, but no significant change of the post-concussion symptom score was observed in the older patients, who also
showed persistent
hypoactivation.
Studies of neural processing
show that risk - taking may be associated with reward - related brain activation, with risk - taking behaviors and the opposite of what normally should happen (ie,
hypoactivation with disappointment losses).