PHGY 209 Lecture Notes - Lecture 39: Parietal Lobe, Fourth Ventricle, Central Sulcus
Document Summary
Central nervous system (cns) -> brain and spinal cord. Afferent (sensory input) -> cell bodies outside of the central nervous system (cns), carry info into the cns. Cranial nerves -> nerves that directly emerge from or lead to the brain and brain stem, related to somatic, visual, olfactory (smell), taste and auditory senses. Spinal nerves -> emerge from the spinal cord, related to somatic sensation (touch, temperature, pain) Visceral -> somatic sensation in the gut, stomach and insides. Autonomic efferent -> involuntary decision, carries info from cns to stimulate for example; smooth & cardiac muscles. Somatic efferent -> voluntary decision, carries info from cns to stimulate the skeletal muscles. Having wrinkles on the brain increases its surface area. Sulcus -> grooves in the brain (valley) Gyrus -> part that sticks out (hill) Cerebellum -> smaller portion of brain below the cerebral cortex. Cerebrum cortex -> the larger portion of the brain. Central sulcus -> separates the frontal and parietal lobe.
