Human Anatomy Mike Aaron Ch 16

Autonomic Nervous System

involuntary ; regulated by Hypothalamus

General Visceral Sensory Neurons

input portion of ANS ; carry impulses from internal organs and joints to the CNS

General Visceral Motor Neurons

carry impulses to cardiac muscle, smooth muscle, and some glands

2 Divisions of the Motor Portion of ANS

Sympathetic Division & Parasympathetic Division

Dual Innervation

organs receiving impulses from both the sympathetic and parasympathetic division ; opposing effects

Anatomy of the Motor Pathway in ANS

2 neurons ; first neuron has cell body in the CNS & second neuron extends to effectors in the body

Autonomic Ganglion

separates the 2 neurons

Preganglionic Cell

in the CNS before ganglion

Postganglionic Cell

extends to the effectors of the body after ganglion

Parasympathetic Division

energy conservation restoration system ; dominates in digestive glands and GI Tract

SLUD Responses

associated with parasympathetic division ; salivation, lacrimation, urination, deflation

4 Cranial Nerves that carry parasympathetic impulses from the brain to the body

Oculomotor, Facial, Glossopharyngeal, and Vagus

Sympathetic Division

E Situations: excitement, emergency, exercise, embarrassment

Raynaud Disease

contractions of arteries on fingers or toes leading to coldness, numbness, and discoloration

Horner Syndrome

lesions on neurons of the brainstem leading to dropping of the eyelid, flushing of thespian, and lack of facial perspiration