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02.07 Thursday

02.07 Thursday - Thursday February 7th 2008 Recall Somatic...

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Thursday, February 7 th , 2008 Recall: Somatic Neuron - skeletal muscle - voluntary control - from ventral horn to body – all one neuron Autonomic Neuron - organs and smooth muscle - involuntary control - from lateral horn, synapses, to body Nervous System Peripheral Nervous System Central Nervous System Motor Sensory Brain Spinal Cord Somatic Autonomic Sympathetic Parasympathetic Autonomic Neurons: - affects: heart rate, vessels dialate, 2 others- look up! - o Oppose one another in their actions o SNS- heart rate ↑, PSNS- heart rate ↓ Thoraco-Lumbar Division T 1 -L 2 preganglionic sympathetic fibers enter spinal cord Pregangloinic Autonomic Neurons- myelinated look white, aka “White Rami” Postganglionic Autonomic Neurons- NOT myelinated look grey, aka “Grey Rami” Majority of synapses in paravertebral column, but some go out and synapse → collateral ganglion 3 Places Autonomic Sympathetic Neurons can Synapse: 1. para-vertebral column → same level
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02.07 Thursday - Thursday February 7th 2008 Recall Somatic...

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