Autonomic nervous system BMS 231: 2015/2016 DR SOBIA IKRAM DR AQEELA BANO DR SADIA FARHAN

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.

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.

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)

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.)

Autonomic nervous system The ANS is Part of the peripheral nervous system, which controls Smooth muscles, Cardiac muscles Glands

Autonomic Nervous System Sympathetic “Fight or flight” “E” division Exercise, excitement, emergency, and embarrassment Parasympathetic “Rest and digest” “D” division –Digestion, defecation, and diuresis

SYMPATHATIC

PARASYMPATHETIC

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

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

PARASYMPATHETIC DIVISION Also called CRANIO SACRAL DIVISION Fibers of parasympathetic originates from the craniosacral region of the spinal cord ANATOMY OF PARASYMPATHETIC & SYMPATHETIC DIVISION

SYMPATHETIC DIVISION Also called THORACO LUMBAR DIVISION Fibers of Sympathetic originates from the thoracolumbar region of the spinal cord

Sympathetic Parasympathetic Work antagonistically

Some Exercise now....