PSYCH261 Chapter Notes - Chapter 3: Superior Colliculus, Globus Pallidus, Cranial Nerve Nucleus

• School: University of Waterloo
• Department: Psychology
• Course: PSYCH261
• Professor: Daniel Smilek

Document Summary

Central nervous system (cns): brain and the spinal cord. The spinal cord communicates with all the sense organs and muscles except those of the head. It is a segmented structure, and each segment has on each side a sensory nerve and a motor nerve. Each segment of the spinal cord sends sensory information to the brain and receives motor commands from the brain (sensory nerves enter dorsal side of the spinal cord). Peripheral nervous system (pns): connects the brain and spinal cord to the rest of the body. Somatic nervous system consists of the axons conveying messages from the sense organs to the cns and from the cns to the muscles. Autonomic nervous system controls the heart, intestines, and other organs: 1. Dorsal: towards the back (in a four-legged animal, the top of the brain is dorsal) Ventral: towards the stomach (the bottom of the brain is ventral)