PSYB65H3 Chapter Notes - Chapter 14: Closed Head Injury, Middle Cerebral Artery, Cerebrovascular Disease
Document Summary
When a brain suffers significant damage, no amount of effort can restore the brain back to its original healthy state. A cns lesion (meaning to hurt ) is an area of damaged neural tissue, including the loss of cells or discontinuity of previously present connections. Tumor (aka neoplasms & space occupying lesions ) A mass of new and abnormal tissue that is not beneficial to surrounding structures and the body. They can cause damage to the cns by causing pressure and taking up space of the cns and are space occupying lesions. These differ depending on the type of cell it grows from, how fast it grows (infiltrate), if it invades neurons, destroys neural tissue(encapsulated), if it has clear borders, and its likelihood of recurrence. The location and size of a tumor also influence neurological effects, for example a tumor of the pituitary may affect vision, as it would cause pressure on the adjacent optic chiasm.
