PSYB65H3 Lecture : PSYB65 chapter 14.docx
Document Summary
Tumor: mass of new and abnormal tissue that is not beneficial: also called neoplasms new tissue , space occupying lesions, foreign objects that cause damage to cns. Tumors differ in growth rate, whether they infiltrate or stay encapsulated, or how likely to recur if removed. 3 major types of brain tumours: originate from glial cells, the meninges, nervous tissue, or other parts of the body already infected with a tumor: from glial cells gliomas. Hard to surgically remove chemotherapy is often treatment instead. Highly malignant, forms around cerebellum and brainstem early in life so it affects vegetative functions. Surgery best treatment: metastatic tumors: secondary tumors from migrated tumor. More common for original tumor to be located outside of cns. Multiple metastatic tumors: more spread from lungs to cns. Neuropsychological effects: small slow infiltrating astrocytoma in primary visual cortex can slowly cause nlndness in part of visual field. Same with tuomrs of pituitary gland because its close to optic chiasm.
