BIOL 031 Lecture Notes - Lecture 13: Autonomic Ganglion, Sympathetic Ganglion, Autonomic Nervous System
18 Sep 2020
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Document Summary
Describe the differences and similarities between the somatic and autonomic nervous systems. The efferent division of the pns is divided into: Somatic ns: controls skeletal muscles and is generally said to be voluntary. Autonomic ns: controls cardiac and smooth muscle, many glands and some adipose tissue. Example in the eye of the efferent ns: the skeletal muscle controls the eye lid movement and eye ball movement. The smooth muscle controls the diameter of the pupil and the shape of the lends. The somatic pathway consists of one neuron from the cns to the target. The autonomic pathway consists of two neurons. Cns and synapses in the autonomic ganglion to another neuron that projects to the target tissue. The autonomic ganglion: is the integrating centre for autonomic reflexes. It receives the sensory input and modulates the messages. The first neuron is called the presynaptic neuron and the second neuron in the pathway is the post synaptic neuron.
