Brain Damage and Lower IQ ( loss of intelligence) 
Definition~Intelligence is a stable trait which includes many aspects of cognitive functioning. Following a concussion, thebrain is unable to function as well as it did prior to injury.


With up to 3.8 million concussions occurring annually, questions about how a concussion may impact a person’s memory are common. Concussions can occur as a result of an accident or trauma to the brain while playing a contact sport, among other scenarios. A concussion rattles the brain inside the skull and recovery times vary depending upon the individual and severity of the blow to the head. In How Concussions Affect Academics, concussion expert Jonathan French, PsyD, discussed how a concussion may impact a student’s ability to learn while injured.