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SHORT INTRODUCTION TO THE AUTONOMIC NERVOUS
SYSTEM
COORDINATES THE REGULATION AND INTEGRATION OF BODILY FUNCTIONS.
ACTIVITIES ARE NOT UNDER DIRECT CONSCIOUS CONTROL.
THE HUMAN NERVOUS SYSTEM DIVISIONS
1PERIPHERAL NERVOUS
SYSTEM
NERVOUS SYSTEM
2CENTRAL NERVOUS SYSTEM
THE CENTRAL NERVOUS SYSTEMS
BRAIN
SPINAL CORD
1-THE PERIPHERAL NERVOUS SYSTEM
EFFERENT/MOTOR NEURONS CARRY SIGNALS AWAY FROM THE CNS.
AFFERENT/SENSORY NEURONS CARRY SIGNALS TOWARDS CNS.
PERIPHERAL NERVOUS SYSTEMNEURONS ARE LOCATED
OUTDISE CNS.A-EFFERENT DIVISION
B- AFFERENT DIVISION
A-EFFERENT DIVISION
a- AUTONOMIC NERVOUS SYSTEM
a- AUTONOMIC NERVOUS SYSTEM
b- SOMATIC NERVOUS SYSTEM
ENTERIC BRAIN OF THE GUTPARASYMPATHATIC CRANIOSACRAL DIVISIONSYMPATHATIC THORACOLUMBAR DIVISION
THE NERVOUS SYSTEM SUMMARISED
THE ENTERIC NERVOUS SYSTEM THIRD DIVISION OF ANS. INNERVATE GIT, PANCREAS AND
GALLBLADDER. CONSTITUTES THE BRAIN OF THE
GUT. MODULATED BY BOTH
PARASYMPATHETIC AND SYMPATHATIC NERVOUS SYSTEMS.
PARASYMPATHETIC NERVOUS SYSTEM
PREGANGLIONIC FIBRES ARISE FROM CRANIAL NERVES (III,VII,IX,X) & SACRAL REGION (S2 TO S4) OF THE SPINAL CORD.
KNOW AS CRANIOSACRAL REGION. DOMINANT IN REST AND DIGEST
SITUATIONS. MAINTAIN HOMEOSTASIS. EXAMPLES INCLUDE DIGESTION AND
ELIMINATION OF WASTES.
SYMPATHETIC NERVOUS SYSTEM
PREGANGLIONIC NEURONS ORIGINATE IN THORACIC AND LUMBAR REGION (T1 & L2) OF SPINAL CORD.
KNOWN AS THORACOLUMBAR REGION. RSPONDS TO STRESSFUL SITUTAIONS. PREPARES BODY FOR FIGHT AND FLIGHT
RESPONSE BY INCREASING HEART RATE AND BP , INCREASES BLOOD FLOW TO MUSCLES & HEART, DILATES PUPIL.
SYMPATHEITIC AND PARASYMPATHETIC NERVOUS SYSTEMS , A COMPARISION
PARASYMPATHETIC AND SYMPATHETIC NERVOUS SYSTEM, A COMPARSION
THINGS TO REMEMBERNEURON ALSO CALLED AS A NERVE CELL.IT IS THE
BASIC STRUTUCRAL AND FUNCTIONAL CELL OF THE NERVOUS SYSTEMS.
PROCESSES AND TRANSMITS INFORMATION THROUGH ELECTRICAL AND CHEMICAL SIGNALS.
PREGANGLIONIC NEURON A NEURON WHOSE CELL BODY IS
LOCATED WITHIN THE CENTRAL NERVOUS SYSTEM.
CONTAINS A MYELINATED AXON THAT TRAVELS OUT OF THE CNS.
MAKE A SYNAPTIC CONNECTION IN GANGLION (AGGREGATION OF NERVE CELL BODIES LOCATED IN PERIPHERAL NERVOUS SYSTEM).
PREGANGLIONIC NEURON
POSTGANGLIONIC NEURON NEURON WHOSE CELL BODY IS LOCATED
WITHIN A GANGLION OUTSIDE CNS AND WHOSE FIBRES EXTEND FROM THE GANGLION TO THE EFFECTOR ORGANS.
USUALLY NON-MYELINATED. GANGLIA SERVE AS RELAY STATION
BETWEEN THE PRE AND POST GANGLIONIC FIBRES (SEE PREVIOUS SLIDE).
THAT’S ALL FOLKSTHANK YOU