Autonomic Nervous System PDF

o Collection of nerves and ganglia scattered throughout the brain o Consists of 12 pairs of cranial nerves, 31 pairs of spinal nerves and their branches to the entire body. I.. Olfactory - OH -sen...

o Collection of nerves and ganglia scattered throughout the brain o Consists of 12 pairs of cranial nerves, 31 pairs of spinal nerves and their branches to the entire body. I.. Olfactory - OH -sen -sensory nsory II. II I. Optic - OH OH - sensory sensory III. II II. Occulomotor - OH -motor IV. IV V. Trochlear Trochlea ar - To - motor motor V.. V Trigeminal Trigemin nal - Touch -mixed VI. V I. Abducens Abducen ns - And - motor motoor V VII. II. Facial - Feel Feel -mmixed -mixed V VIII. III. Vestibulocochlear Vestibulo ocochlear - Virgin Virgiin --sensory sensory IX. IX X. Glossopharyngeal Glossoppharyngeal - *LUO¶V - mixed mixe ed X.. X Vagus - Vagina - mixed mixed XI. X I. Accessory/Spinal Accessory/SSpinal - Ah! So -motor XII. X II. Hypoglossal - Heavenlyy -motor -mootor 162 1. Enteric 2. Somatic 3. Autonomic 9 Highly organized collection of neurons located in the walls of the GIT 9 Innervated by Myenteric Plexus and the submucous plexus ƒ Largely concerned with consciously controlled functions such as: ƒmovement ƒPosture In short- vOluntary ƒ Largely Autonomous (Independent) ƒ its activities are not under direct conscious control. ƒ concerned primarily with visceral functions ƒ Cardiac Output ƒ Blood flow to various organs ƒ Digestion ƒ In short-INvoluntary Preganglionic Nerve Fiber -terminates and synapses in an autonomic ganglion Postganglionic nerve fiber- originates in a ganglion and terminates in smooth cardiac muscle or a gland.  SYMPATHETIC S YMPATHETIC NS PARASYMP PATHETIC NS PARASYMPATHETIC ORIGIN ƒ thoraco-lumbar ƒ Cranio (III,VII,IX X)-sacral (III,VII,IX,X) X,X (III,IV) Neurotr ransmitter Neurotransmitter Preganglionic Prega anglionic fib fiber ber ƒ Acetylcholine ƒ Acetylcholinee Postganglionic Postg gangliionic fiber ƒ Norepinephrine Norepinephrine ƒ Acetylcholine A cettyllch holiline Preganglionic fiber ƒ Short ƒ Long L ong ƒ Long ƒ Shortt Postg ganglion nic fi Postganglionic iber fiber Receptors Rece eptors ƒ Alpha, Alph ha, beta ƒ Muscarinic, Mu uscarinic, nicotinic nico otinic