NATS 1540 Lecture Notes - Lecture 57: Postcentral Gyrus, Peripheral Nervous System, Receptive Aphasia
31 May 2020
School
Department
Course
Professor
Document Summary
The nervous system is composed of : central nervous system (brains and spinal cord) and peripheral nervous system (12 pairs of cranial nerves and 31 pairs of spinal nerves) The role of the peripheral nervous system is to carry afferent messages (sensory) to the. Cns from receptors and efferent messages (motor) from the cns to the muscles and glands. The cerebral cortex is the outer layer of nerve cell bodies of the brain. Lacks myelin and looks like grey matter. Each half is known as a hemisphere. Hemisphere are divided into 4 sections: frontal, parietal, temporal, occipital. Frontal: personality, emotions, behaviour, intellectual function (pebi) The basal ganglia are bands of grey matter under the hemispheres forming the subcortical associated motor system (the extrapyramidial system), they control automatic associated movements (ex. arm swinging) The thalamus is the relay station for the nervous system. It contains the synapses which relay information between the spinal cord and cerebral cortex.
