Chapter 15.2, Problem 6LO

Summary Introduction

To compare: The anatomic differences in the lower motor neurons and associated ganglia of the parasympathetic and sympathetic divisions.

Concept introduction: The autonomic nervous system is a functional division of the peripheral nervous system. It involves two autonomic neurons in the efferent pathway, namely preganglionic neurons and postganglionic neurons. The cell body of the preganglionic neurons is in the central nervous system (CNS), whereas the postganglionic neurons lie entirely outside the CNS. The autonomic nervous system is (structurally and functionally) divided into two parts, namely the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).