Autonomic nervous system

BMS 231: 2015/2016

DR SOBIA IKRAMDR AQEELA BANODR SADIA FARHAN

Table of Contents1. Objectives for this lesson2. 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.

ObjectivesWhen 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 embarrassmentParasympathetic

• “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

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....

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http://www.google.com.sa/url?sa=i&rct=j&q=exam+tension+babies&source=images&cd=&cad=rja&docid=RQDbiFphP__6FM&tbnid=nZ7mKJLfbFqEMM:&ved=0CAUQjRw&url=http://blog.myams.org/2013/04/21-animals-to-relieve-your-exam-stress-part-2/&ei=73qDUZIdx7482I-B2Ag&psig=AFQjCNGvZ5WQ3qPgzBdWIafIraiV2NEP1g&ust=1367657557022699

http://www.google.com.sa/url?sa=i&rct=j&q=exam%20tension%20cartoons&source=images&cd=&cad=rja&docid=jRYikr9v6I75ZM&tbnid=Dv6gHYf8YftJ5M:&ved=0CAUQjRw&url=http://www.cartoonstock.com/directory/e/exam_stress_gifts.asp&ei=YHqDUaC2CIG1PJa7gJgI&psig=AFQjCNENsuxbxKhqnZ_D-EVZ_TDnuzYLTg&ust=1367657433509258

http://www.google.com.sa/url?sa=i&rct=j&q=fighting+cartoons&source=images&cd=&cad=rja&docid=M2PdI7QfZMA_nM&tbnid=S09ZRajcH_ikLM:&ved=0CAUQjRw&url=http://www.dreamstime.com/stock-image-cartoon-couple-fighting-image22427991&ei=FnmDUfmdFcnhOr3sgOAC&psig=AFQjCNH_zMQh6OlSwhzq3Ca4U5Er2FjVdw&ust=1367656983364102