PSY290H5 Lecture 8: Lecture 8 - Neurological Disorders
Document Summary
Neurological disorders: brain damage, demyelinating diseases, brain infection, migraine. Oxygen storage within cells of the nervous system is poor: brain relies on constant blood supply. Brain supplied by rich network of blood vessels. Hypertension, structural atrial defects, leukemia, toxic chemcials. Atheroscelerosis, age, hypertension, smoking, diabetes, high cholesterol, obesity, drug use increase oxygen. Results in death of neural tissue infarct. Right picture: thrombosis a blockage of the artery. Thrombosis stays at the sight where it originates whereas embolism breaks away and travels to the brain. Penumbra can be treated before it dies. Open head injuries: gunshot wounds, skull fracture, damage dependent on injury site. Damage dependent on site of cop and countercoup. Bleeding under the dura mater of the brain (outer meninges of the brain) Also causes pressure in the brain that can cause further damage. Damage: corpus callsoum, fornix, upper brainstem, base of frontal lobe, medial temporal lobes. Cognitive symptoms: lack of concentration, reduced processing speed, attention/memory deficits.
