Principles of ANS vs. Somatic NS Human Anatomy · CHAPTER 20 The Autonomic Nervous System ......
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CHAPTER 20 The Autonomic Nervous System Copyright © 2007 by John Wiley & Sons, Inc. Principles of Human Anatomy Eleventh Edition Gerard J. Tortora & Mark T. Nielsen ANS vs. Somatic NS ANS vs. Somatic NS Somatic Nervous System Conscious/voluntary branch of the Peripheral Nervous Conscious/voluntary branch of the Peripheral Nervous System System Single motor neuron out to effectors Single motor neuron out to effectors Effectors Effectors – skeletal muscle skeletal muscle Autonomic Nervous System stem Involuntary branch of the Peripheral Nervous System Involuntary branch of the Peripheral Nervous System Two motor neurons Two motor neurons Preganglionic Preganglionic Postganglionic Postganglionic Effectors Effectors – smooth muscle and glands smooth muscle and glands Autonomic Nervous System Autonomic Nervous System Sympathetic Division of the ANS Sympathetic Division of the ANS Fight or Flight Fight or Flight Parasympathetic Division of the ANS Parasympathetic Division of the ANS Rest and Digest Rest and Digest Somatic NS Somatic NS Sympathetic NS Sympathetic NS Sympathetic NS Sympathetic NS (special) (special) Parasympathetic Parasympathetic NS NS 20_06 20_06 Origins of Pre & Post ganglionic Origins of Pre & Post ganglionic fibers fibers Sympathetic NS Preganglionic fiber Preganglionic fiber – Thoracolumbar region of Thoracolumbar region of the spinal cord the spinal cord Postganglionic fiber Postganglionic fiber – Sympathetic Ganglion Sympathetic Ganglion Chain or Collateral Ganglion Chain or Collateral Ganglion Parasympathetic NS Preganglionic fiber Preganglionic fiber – Craniosacral region of Craniosacral region of the CNS the CNS Postganglionic fiber Postganglionic fiber – Terminal ganglia (in or Terminal ganglia (in or near effector organs) near effector organs)
Transcript of Principles of ANS vs. Somatic NS Human Anatomy · CHAPTER 20 The Autonomic Nervous System ......
CHAPTER 20The Autonomic Nervous System
Copyright © 2007 by John Wiley & Sons, Inc.
Principles ofHuman Anatomy
Eleventh EditionGerard J. Tortora
&
Mark T. Nielsen
ANS vs. Somatic NSANS vs. Somatic NS
Somatic Nervous System Conscious/voluntary branch of the Peripheral Nervous Conscious/voluntary branch of the Peripheral Nervous
SystemSystem Single motor neuron out to effectorsSingle motor neuron out to effectors Effectors Effectors –– skeletal muscleskeletal muscle
Autonomic Nervous Systemstem Involuntary branch of the Peripheral Nervous SystemInvoluntary branch of the Peripheral Nervous System Two motor neuronsTwo motor neurons
PreganglionicPreganglionic PostganglionicPostganglionic
Effectors Effectors –– smooth muscle and glandssmooth muscle and glands
Autonomic Nervous SystemAutonomic Nervous System
Sympathetic Division of the ANSSympathetic Division of the ANS Fight or FlightFight or Flight
Parasympathetic Division of the ANSParasympathetic Division of the ANSRest and DigestRest and Digest
Somatic NSSomatic NS
Sympathetic NS Sympathetic NS
Sympathetic NSSympathetic NS(special)(special)
ParasympatheticParasympatheticNSNS
20_0620_06 Origins of Pre & Post ganglionic Origins of Pre & Post ganglionic fibersfibers
Sympathetic NS Preganglionic fiber Preganglionic fiber –– Thoracolumbar region of Thoracolumbar region of
the spinal cordthe spinal cord Postganglionic fiber Postganglionic fiber –– Sympathetic Ganglion Sympathetic Ganglion
Chain or Collateral GanglionChain or Collateral Ganglion Parasympathetic NS
Preganglionic fiber Preganglionic fiber –– Craniosacral region of Craniosacral region of the CNSthe CNS
Postganglionic fiber Postganglionic fiber –– Terminal ganglia (in or Terminal ganglia (in or near effector organs)near effector organs)
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Length of Pre & Post ganglionic Length of Pre & Post ganglionic fibersfibers
Sympathetic NSPreganglionic fiber Preganglionic fiber –– ShortShortPostganglionic fiber Postganglionic fiber –– LongLong
Parasympathetic NSPreganglionic fiber Preganglionic fiber –– LongLongPostganglionic fiber Postganglionic fiber –– ShortShort
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20_0320_03 Type of Pre & Post ganlionic FibersType of Pre & Post ganlionic Fibers
Sympathetic NS Preganglionic fibers: Cholinergic (ACh Preganglionic fibers: Cholinergic (ACh
secreting)secreting) Postganglionic fibers: Adrenergic Postganglionic fibers: Adrenergic
(Norepinephrine secreting)(Norepinephrine secreting)
Parasympathetic NS Preganglionic fibers: Cholinergic (ACh Preganglionic fibers: Cholinergic (ACh
secreting)secreting) Postganglionic fibers: Cholinergic (ACh Postganglionic fibers: Cholinergic (ACh
secreting)secreting)
20_0620_06 Type of Receptors on PostType of Receptors on Post--ganlionic Neuronganlionic Neuron
Sympathetic NS Preganglionic fibers: Cholinergic (ACh Preganglionic fibers: Cholinergic (ACh
secreting)secreting) Postganglionic receptors: NicotinicPostganglionic receptors: Nicotinic
Parasympathetic NS Preganglionic fibers: Cholinergic (ACh Preganglionic fibers: Cholinergic (ACh
secreting)secreting) Postganglionic receptors: NicotinicPostganglionic receptors: Nicotinic
20_0620_06 Type of Receptors on EffectorType of Receptors on EffectorSympathetic NSPostganglionic fibers: Adrenergic Postganglionic fibers: Adrenergic
(Norepinephrine secreting)(Norepinephrine secreting)Effector receptors: AdrenergicEffector receptors: AdrenergicAlpha or Beta (1,2 or 3)Alpha or Beta (1,2 or 3)
Parasympathetic NSPostganglionic fibers: Cholinergic Postganglionic fibers: Cholinergic
(ACh secreting)(ACh secreting)Effector receptors: MuscarinicEffector receptors: Muscarinic
20_0620_06 Dominance & Types of DischargeDominance & Types of Discharge
Sympathetic NSFight or FlightFight or FlightFrequently a mass discharge of Frequently a mass discharge of
entire systementire systemParasympathetic NSRest and DigestRest and DigestUsually discrete organ activationUsually discrete organ activation
