Autonomic Nervous System

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Autonomic Nervous System

• Introduction by
• Dr. Sobia Ikram

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Table of Contents

1. Objectives for this lesson
2. Definition of Autonomic Nervous System and
   muscles and organs involved.
3. Flow Chart of the Nervous system including
   Divisions of ANS.
4. Sympathetic and Parasympathetic pathways and
   their Effects on the organs.

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Objectives

• When you finish this lesson, you should be able
  to
• Define Autonomic nervous system , know the main
  systems involved involved
• Explain the Functions of the ANS and the Flow
  chart of the Autonomic nervous system.
• Identify and differentiate between the
  sympathetic and Parasympathetic divisions
• Understand the sympathetic and parasympathetic
  pathways , and their effect on the body systems.

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Autonomic nervous system

• The autonomic nervous system (ANS) or visceral
  nervous system is the part of the peripheral
  nervous system that controls homeostasis.(internal
  functions)

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Autonomic nervous system

• The main systems that are controlled by the ANS
  are
• cardiovascular,
• GIT
• respiratory.
• Many of the activities of the ANS are
  involuntary. (However, breathing, for example,
  can be in part consciously controlled.)

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Autonomic nervous system

• The ANS is Part of the peripheral nervous system,
  which controls
• smooth muscles,
• Cardiac muscles
• glands

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Autonomic Nervous System

• Sympathetic
• Fight or flight
• E division Exercise, excitement, emergency, and
  embarrassment
• Parasympathetic
• Rest and digest
• D division
• Digestion, defecation, and diuresis

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SYMPATHATIC
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PARASYMPATHETIC
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Sympathetic

• Fight or flight response
• Release adrenaline and noradrenaline
• Increases heart rate and blood pressure
• Increases blood flow to skeletal muscles
• Inhibits digestive functions

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Parasympathetic

• Rest and digest system
• Calms body to conserve and maintain energy
• Lowers heartbeat, breathing rate, blood pressure

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• ORIGIN OF THE PARASYMPATHETIC
• CRANIO SACRAL
• ORIGIN OF THE SYMPATHETIC
• THORACO LUMBAR

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• Sympathetic
• Parasympathetic

Work antagonistically
Myelinated motor neuron
Unmyelinated motor neuron
CNS
ganglion
effector
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Some Exercise now....
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