Concussion is a trauma-induced change in mental status, with confusion and amnesia, and with or without a brief loss of consciousness. A concussion occurs when the head hits or is hit by an object, or when the brain is jarred against the skull, with...

Concussion is a change in mental status caused by trauma (shock). It is accompanied by confusion, loss of memory, and, sometimes, loss of consciousness. A concussion occurs when the head hits or is hit by an object. A concussion can also occur when...

(from Latin, concussus, derived from con: together, quatere: to shake) Concussion is a term indicating disturbance or shaking. It has various meanings depending on the context in which it is used, but in neurological terms it refers to a disturbance in...

Period of nervous-function impairment that results from relatively mild brain injury, often with no bleeding in the cerebral cortex. It causes brief unconsciousness, followed by mental confusion and physical difficulties. These effects usually clear up...

Sudden shock to or jarring of the brain, which may or may not cause a loss of...