anatomy Ch18h - Human Anatomy McKinley & O'Loughlin...

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Human Anatomy Chapter 18: The Autonomic Nervous System Autonomic Nervous System Comparison of the Somatic and Autonomic Nervous Systems o SNS and ANS are both part of the peripheral nervous system (PNS). o SNS o ANS Comparison of SNS and ANS o SNS o ANS o Motor neurons SNS ANS preganglionic and postganglionic fibers (neurons)
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Divisions of the ANS o ANS is subdivided into parasympathetic and sympathetic divisions. o Autonomic ganglia The Parasympathetic Division o Primarily concerned with conserving energy and replenishing nutrient stores. nicknamed the “rest-and-digest” division o Parasympathetic division is also termed the craniosacral division because its preganglionic neurons are housed within nuclei in the brainstem and within the lateral gray regions of the S2–S4 spinal cord segments. o PS ganglionic neurons Cranial Nerves o Associated with the parasympathetic division are the oculomotor (CN III), facial (CN VII), glossopharyngeal (CN IX), and vagus
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anatomy Ch18h - Human Anatomy McKinley & O'Loughlin...

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