The<unk>  is an unnatural position of the arms following a concussion. Immediately after moderate forces have been applied to the brainstem, the forearms are held flexed or extended (typically into the air) for a period lasting up to several seconds after the impact. The<unk>  is often observed during athletic competition involving contact, such as combat sports, American football, hockey, rugby union, rugby league and Australian rules football. It is used as an overt indicator of injury force magnitude and midbrain localization to aid in injury identification and classification for events including on-field and/or bystander observations of sports-related head injuries.
Fencing response
Burst suppression
Premonitory urge
Withdrawal reflex
Prepulse inhibition
Mood congruence
Reflex
Disinhibition