What do you call a loss of function either partial or complete due to a blow or fall?

The term that refers to a loss of function, whether partial or complete, resulting from a blow or fall is a concussion. A concussion is a type of traumatic brain injury that occurs when the head experiences a sudden jolt or impact. This impact can affect the brain's normal functioning, sometimes leading to temporary loss of consciousness or other cognitive impairments. Symptoms of a concussion can include confusion, headache, dizziness, and difficulty with balance or coordination, which underscores the loss of function aspect.

While the other choices relate to injuries that can occur from physical trauma, they do not specifically describe the overall neurological impact and functional loss associated with concussions. For instance, a contusion typically refers to a bruise on the skin or underlying tissue, a fracture denotes a break in a bone, and a dislocation involves the displacement of a bone from its joint. Each of these conditions can result from a blow or fall but does not encapsulate the broader implications of cognitive and functional impairment seen in concussions.