Counter coup injury seen in when ?
a) Moving head is suddenly decelerated
b) Stationery head is suddenly accelerated
c) Fall of heavy object on head
d) None of the above
Correct Answer - A
Ans. is ‘a’ i.e., Moving head is suddenly decelerated
Countrecoup injury is caused when moving head is suddenly
decelerated by hitting a firm surface.
It can either be a subdural or subarachnoid hemorrhage.
Brain injuries
Coup injury is defined as the injury of skull and/or brain at the site of
impact, e.g. a blow on forehead, resulting in fracture of frontal bone
and injury or haemorrhage in frontal lobe.
Contre coup injury is defined as an injury to the skull or brain, on
opposite (contralateral) side of the area of impact.
Cerebral concussion (stunning) occurs due to head trauma and is
characterized by gross physiological disturbance of brain without
any anatomical damage. There is sudden loss of consciousness with
a tendency to spontaneous recovery. The condition is more severe
when damage is caused to the moving head (decceleration injury)
than when it results from blows to skull. Recovery from concussion
is often followed by retrograde amnesia.