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The Autonomic Nervous System. S. J. Potashner sjp9713@neuron.uchc.edu. Autonomic NS. A division of the nervous system Innervates & regulates effectors of homeostasis Cardiovascular organs Respiratory organs Digestive organs Urinary organs Reproductive organs Glands

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the autonomic nervous system

The Autonomic Nervous System

S. J. Potashner

sjp9713@neuron.uchc.edu

slide2

Autonomic NS

  • A division of the nervous system
  • Innervates & regulates effectors of homeostasis
  • Cardiovascular organs
  • Respiratory organs
  • Digestive organs
  • Urinary organs
  • Reproductive organs
  • Glands
  • Part of a network of structures in the CNS
slide3

Autonomic NS

Three major subdivisions

Sympathetic division:

organized to mobilize the body for activity

Parasympathetic division:

organized for energy conservation

Enteric division:

controls the local functions of the GI tract

slide5

Sympathetic

Pathways

slide6

X-Section

Upper

Abdomen

Ant

L

R

Post

slide8

Autonomic

Pathways

slide9

Functions

Sympathetic Division

Parasympathetic Division

Mobilize body for activity:

Energy expenditure

Decrease energy stores

Catabolic functions

Cardio-pulmonary adjustments

Energy conservation:

Reduce energy expenditure

Increase energy stores

Anabolic functions

Cardio-pulmonary adjustments

slide11

Baroreflex

NTS

Nucleus

ambiguus

Glossopharyngeal n.

Vagus n.

Carotid body

(-)

(-)

Cardiac

plexus

(-)

Heart rate &

contraction

increase

SA node

Excitatory

T1-T5

Inhibitory

(+)

Cardiac n.

slide12

Baroreflex

NTS

Nucleus

ambiguus

Glossopharyngeal n.

Vagus n.

Carotid body

(+)

Cardiac

plexus

(+)

(+)

Heart rate &

contraction

decrease

SA node

Excitatory

T1-T5

Inhibitory

(-)

Cardiac n.

slide13

Bladder Control

Sensory

Sympathetic

Somatic motor

T10-L2

Parasympathetic

Detrusor

muscle

-

Internal

urethral

sphincter

(males)

Bladder

+

+

+

External

urethral

sphincter

S2-S4

Urethra