Overview of the Nervous System

This study guide covers the nervous system, focusing on its divisions: the Central Nervous System (CNS) (brain and spinal cord) and the Peripheral Nervous System (PNS). The PNS is further divided into the autonomic (involuntary actions) and somatic (voluntary actions) nervous systems. The autonomic nervous system includes the sympathetic ("fight or flight") and parasympathetic ("rest and digest") divisions. Key concepts include the functions of each division and their roles in various scenarios.