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Autonomic Nervous system Efferent system divided into Somatic and Autonomic divisions. Autonomic into sympathetic and parasympathetic division Functions: control of glands and smooth muscles - involuntary ANS Compare ANS with Somatic Compare Parasympathetic and Sympathetic Note: neurotransmitters ganglia and locations of the ganglia fibers and their length location from where communication with body – regions emerge from effects Peripheral Nervous System • Somatic N.S. Skeletal Muscle • Autonomic N.S. Parasympathetic Sympathetic Division Division Somatic Nervous System (SNS) Effector Tissue is Skeletal Muscle Control is Voluntary (except reflexes) Autonomic Nervous System (ANS) Effector Tissue is Cardiac & Smooth Muscle and Glands Control is Involuntary (except biofeedback) Parasympathetic: Craniosacral outflow, “rest/digest” Sympathetic: Thoracolumbar outflow, “fight/flight” Functional components, and anatomical subdivisions. Somatic Nervous System (SNS) Central Nervous System One motor neurons to a single effector tissue: skeletal muscle Autonomic Nervous System (ANS) Two motor neurons to many effector tissues: cardiac smooth glands Organization of Sympathetic Division Organization of Parasympathetic Division • Preganglionic fibers leave the spinal cord in the ventral roots of the spinal nerves. Splanchnic nerves and collateral ganglia Sympathetic paths Autonomic Sympathetic and Parasympathetic Comparison
