HBS1HBB Lecture Notes - Lecture 5: Arachnoid Mater, Dura Mater, Pia Mater
Document Summary
> in general hemisphere controls the opposite side of the body major fibre tracts decussate (cross the midline) neurons cross. >connective tissue covering the brain & spinal cord. Double layer outer periosteal, inner meningeal. Function: external cover that protects brain & spinal cord extensions into cranial cavity limit movement of the brain. Function: related to subarachnoid space filled with csf. Function: folds to brain surface caries blood vessels. They are white because of the myelin sheath. > grey matter generally located on the outside. > area called cerebral cortex & cerebellar cortex. > some deep parts of the brain have grey matter. A map of the precentral (motor gyrus) and the postcentral (sensory gyrus) Grey and white matter in the spinal cord. > grey mater shaped like a h or a butterfly. Stops well short of end of vertebral column/canal. > about 42 cm long 1. 8 cm thick. > two way pathway between body and brain.
