An injury doesn’t have to be to or near the head to have ramifications on a person’s brain function. For example, a recent study suggests that knee injuries can change certain ways that a person’s brain works.
The study looked at the brain activity of individuals who suffered a particular type of knee injury, an ACL injury, after their knee recovered from the injury. It used brain scans to track this. The study found that these individuals generally showed changes when it came to brain function related to moving their knee. It found that such individual's brains showed changes in their brain’s processing of information from their knee and that such individuals used different brain systems than normal when it came to moving their knee.