AP PSYCHOLOGY

Detailed explanation-1: -Definition. By Mayo Clinic Staff. A brain lesion is an abnormality seen on a brain-imaging test, such as magnetic resonance imaging (MRI) or computerized tomography (CT). On CT or MRI scans, brain lesions appear as dark or light spots that don’t look like normal brain tissue.

Detailed explanation-2: -An intracranial lesion or brain lesion is damage to the brain tissue because of illness, injury, disease or infection, or some other cause. The cause of a brain lesion is sometimes unknown. The lesions are often found during an MRI or CT scan being performed to test for or diagnose some other condition.

Detailed explanation-3: -The congenital destructive lesions of the brain include focal lesions (porencephaly) and diffuse lesions (micrencephaly, hydranencephaly).

Detailed explanation-4: -A lesionectomy is an operation to remove a lesion–a damaged or abnormally functioning area–in the brain. Brain lesions include tumors, scars from a head injury or infection, abnormal blood vessels, hematomas (a swollen area filled with blood), and congenital malformations (brain malformations at birth).