(kŏn-kŭsh'ŏn )

[L. concussio, a shaking]

1. An injury resulting from impact with an object.
2. Partial or complete loss of function, as that resulting from a blow or fall.

c. of brain An imprecise term for a traumatic brain injury.

cerebral c.Traumatic brain injury.

c. of labyrinth Deafness resulting from a blow to the head or ear.

spinal c.Loss of function in the spinal cord resulting from a blow or severe jarring.