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Lecture 8_autonomic_motor (1).pdf - 3/10/21 Autonomic and...

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3/10/211Autonomic and Motor SystemsBio 288Spring 2021Dr. Gerson1Organization of the Nervous system1) central nervous system2) CNS needs sensory input (last two lectures)3) CNS then sends information out to the restof the body (Efferent branch of the NS)Autonomic NS (involuntary NS)Somatic NS (voluntary NS)2The Autonomic Nervous SystemOverviewDual innervation in the autonomic nervoussystemAnatomy of the autonomic nervous systemAutonomic neurotransmitters and receptorsAutonomic neuroeffector junctionsRegulation of autonomic function3
3/10/212Figure 11.1Dual innervation in the autonomic nervous system.PonsMedullaCervicalC1T1L1S1Co1CoccygealSacralLumbarThoracicCollateralganglionSympathetic chainGenitaliaBladderRectumSmallintestineLargeintestineKidneyLiverPancreasSpleenStomachHeartLungsParasympatheticganglionCranial nerve VIICranial nerve IXCranial nerve XVagus nerve(cranial nerve X)Cranialnerve IIILacrimaland salivaryglandsEyeSympatheticParasympatheticC2C3C4C5C6C7C8T2T3T4T5T6T7T8T9T10T11T12L2L3L4L5S2S3S4S5CollateralganglionS2S3S44Dual Innervation of the AutonomicNervous SystemBoth divisions of the autonomic nervous systeminnervate most effector organsPrimary function: regulate organs to maintainhomeostasisParasympathetic and sympathetic activities tend to beantagonisticParasympathetic nervous system: restSympathetic nervous system: fight-or-flight response5Figure 11.2Anatomy of autonomic pathways.CNSPNSPreganglionicneuronAutonomicganglionPostganglionicneuronEffector organs:Cardiac muscleSmooth muscleGlandsAdipose tissue6
3/10/213Anatomy of the Autonomic NervousSystemTwo types of neurons from CNS to effectororgans:Preganglionic neuronsPostganglionic neuronsAutonomic gangliaCommunication from preganglionic topostganglionic neuronIntrinsic neurons7Figure 11.3Anatomical pathways of preganglionic and postganglionic neurons in the sympathetic nervous system.LateralhornPreganglionicneuronSympathetic chainPostganglionic neuronEffector organChromaffin cellAdrenal medullaCollateral ganglionThoracic andlumbarspinal cordEffector organEffector organEffector organ8Anatomy of theSympatheticNervousSystemPreganglionic neurons originate in thethoracolumbar spinal cordLateral hornGeneral anatomyShort preganglionic neurons to sympathetic chainLong postganglionic neurons from sympathetic chain toeffector organsGanglia linked together in sympathetic chain9
3/10/214Figure 11.1Dual innervation in the autonomic nervous system.PonsMedullaCervicalC1T1L1S1Co1CoccygealSacralLumbarThoracicCollateralganglionSympathetic chainGenitaliaBladderRectumSmallintestineLargeintestineKidneyLiverPancreasSpleenStomachHeartLungsParasympatheticganglionCranial nerve VIICranial nerve IXCranial nerve XVagus nerve(cranial nerve X)Cranialnerve IIILacrimaland salivaryglandsEyeSympatheticParasympatheticC2C3C4C5C6C7C8T2T3T4T5T6T7T8T9T10T11T12L2L3L4L5S2S3S4S5CollateralganglionS2S3S4

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