NURS 202 Lecture Notes - Lecture 6: Paroxysmal Attack, Sensory Cortex, Papilledema
Document Summary
Cns (brain spinal cord) + pns (12 cranial nerves, 31 spinal nerves and branches). Pns carries sensory afferent message to cns from sensory receptors; motor efferent from cns out to muscle and glands & autonomic messages govern internal organs and vessels. Meninges: layers of membranes envelop cns: with csf= protect cns. Cns: cortex cerebrum"s outer layer of nerve cell bodies: grey matter- lack myelin- white insulation on axon. -- broca"s area in frontal lobe= motor speech. Centre for functions, thought, memory, reason, sensation, voluntary movement. Hemisphere: l= dom in right handed and some who are left-handed. *specific functions: frontal: personality, behavior, emotion, intellectual function. -- precentral gyrus of frontal lobe initiates voluntary movement. but produce garbled sound: parietal: postcentral gyrus, primary centre for sensation, occipital lobe: primary visual receptor centre, temporal lobe: primary auditory reception centre. Damage= receptive aphasia: hears sound but no meaning.
