Concussion is completely reversible; an hypothesis.
It is hypothesized that there is an entity properly called 'concussion', a transient loss of neuronal function without permanent neuronal damage, as defined years ago by Derek-Denny Brown. This implies that multiple concussions leave no deficit. n +1 times zero is still zero. Arguments are presented indicating that there is a margin of safety between the acceleration inducing 1-10 s loss of function (concussion) and that inducing permanent damage (contusions, lacerations).
Parkinson
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University of Manitoba, Winnipeg, Canada.
D001914:Boxing / Q000293:injuries; D001924:Brain Concussion / Q000209:etiology* / Q000473:pathology / Q000503:physiopathology; D006259:Craniocerebral Trauma / Q000209:etiology; D006801:Humans; D008954:Models, Biological; D009474:Neurons / Q000502:physiology