Psychology 2221B Chapter Notes - Chapter 3: Dorsal Root Ganglion, Cerebrospinal Fluid, Dura Mater

• School: Western University
• Department: Psychology
• Course: Psychology 2221B
• Professor: Shelley Cross- Mellor

Document Summary

The vertebrate nervous system is composed of two divisions: the central nervous system and the peripheral nervous system. Cns is the division of he nervous system that is located within the skull and spine. Central nervous system is composed of two divisions: the brain and the spinal cord. Pns is the division that is located outside the skull and spine. The peripheral nervous system is also composed of two divisions the. The somatic nervous system sns is the part of the pns that interacts with the external somatic nervous system (sns) and the autonomic nervous system (ans) environment. Composed of afferent nerves that carry sensory signals from the skin skeletal muscles, joints eyes ears and so on to the cns. Efferent nerves that carry motor signals from the central nervous system to the skeletal muscles. The autonomic nervous system ans is the part of the pns that regulates the body"s internal environment.