4. Peripheral Nervous System
Not to be forgotten, the peripheral nervous system (PNS) is an extension of the central nervous system. The PNS includes the spinal nerves (Chapter 3), the cranial nerves (Chapter 2), and the autonomic nervous system. This chapter will focus on the anatomy and physiology of the autonomic nervous system as it relates to two conditions commonly seen in the rehabilitation setting. Specifically, this chapter reviews ANS control of the male penile erection and voiding.