Final answer:
A concussion is an injury to the soft brain tissue caused by a blow or shaking, leading to altered mental function. While a concussion normally heals on its own, serious brain injuries can result in permanent damage. All brain injuries necessitate medical attention to optimize recovery. The correct option is D.
Step-by-step explanation:
An injury to the soft tissue of the brain resulting from a blow or violent shaking that results in altered mental function is called a concussion. Concussions are the mildest and most common type of brain injury and often occur during contact sports such as football, soccer, and hockey, among others. These injuries can cause symptoms like headache, drowsiness, and confusion, but they normally heal on their own within a few days.
More serious brain injuries can lead to permanent damage and dysfunction, with symptoms such as loss of consciousness, profound confusion, trouble with speech or motor control, as well as potential long-term consequences like personality changes and memory problems. The severity of these symptoms generally correlates with the part of the brain that was injured.
It's crucial to note that any brain injury, regardless of severity, requires medical attention, as outcomes can be improved with prompt and appropriate care. Brain injuries can arise from various causes including falls, car accidents, violence, and even infectious diseases that affect the central nervous system (CNS).