PAS2201F08 U-5 L-2 Spinal cord and nerves

PAS2201F08 U-5 L-2 Spinal cord and nerves - Review Lecture...

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Review – Lecture I CNS vs. PNS CNS: Brain, spinal cord; Interprets incoming signals and dictates the motor response PNS: Cranial nerves, spinal nerves, and ganglia; Links the body to the CNS Neurons vs. Glia Neuron: soma, dendrites, axon, myelin sheaths, node of Raniver, synapse; [basic structural unit, send (action potential and neurotransmitters) signals] Glia [support, outnumber, divide]: Schwann cells and satellite cells in PNS; astrocytes, microglia, ependymal cells and oligo in CNS Nerve {[fascicle (myelin covers axon) bundles] + blood vessels} endoneurium, perineurium, epineurium Sensory neuron – Interneuron – motor neuron PNS inputs (sensory/afferent) vs. outputs (motor/efferent) Somatic (skin, skeletal muscle, bone) Visceral (heart, lung, digestive organs, etc.) Receptors: free endings; Merkel discs; Pacinian and Meissner’s corpuscles; proprioceptors (muscle spindles and Golgi tendon organs); hair follicle
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Which sensory receptor functions for discriminative touch as well as light pressure and low frequency vibration?
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