Concussion is caused by

Concussion is caused by

• A. a direct blow to the skull with immediate permanent impairment.
• B. a brain tumor.
• C. a blow to the head or very fast acceleration or deceleration, transferring force through the skull to the brain; symptoms include dizziness, headache, temporary loss of consciousness, and temporary amnesia; most people fully recover.
• D. a spinal cord injury from a fall.

Answer: (C)

Concussions come from a mild traumatic brain injury caused by either a direct blow to the head or a rapid head movement (fast acceleration or deceleration) that makes the brain move inside the skull. This transfer of force disrupts brain function, leading to symptoms such as dizziness, headache, temporary loss of consciousness, and temporary amnesia. Most people recover fully with proper rest and a gradual return to activity. The other possibilities don’t fit because a direct blow with immediate permanent impairment suggests lasting, irreversible damage right away, which isn’t how concussions typically present. A brain tumor is not caused by a concussion. A spinal cord injury from a fall involves the spine, not the brain, so it’s a different injury mechanism.

Concussions come from a mild traumatic brain injury caused by either a direct blow to the head or a rapid head movement (fast acceleration or deceleration) that makes the brain move inside the skull. This transfer of force disrupts brain function, leading to symptoms such as dizziness, headache, temporary loss of consciousness, and temporary amnesia. Most people recover fully with proper rest and a gradual return to activity.

The other possibilities don’t fit because a direct blow with immediate permanent impairment suggests lasting, irreversible damage right away, which isn’t how concussions typically present. A brain tumor is not caused by a concussion. A spinal cord injury from a fall involves the spine, not the brain, so it’s a different injury mechanism.