PAS2201F08 U-5 L-1 Nervous system fundamentals

PAS2201F08 U-5 L-1 Nervous system fundamentals - Nervous...

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Nervous system: Fundamentals Zezong Gu, MD, PhD Department of Pathology & Anatomical Sciences GFP-Purkinje neuron
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Nervous system: What is it good for? Monitors outside world Processes information Dictates the body’s response to that information
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Basic divisions Central nervous system (CNS) Brain, spinal cord Interprets incoming signals and dictates the motor response Peripheral nervous system (PNS) Cranial nerves, spinal nerves, and ganglia Links the body to the CNS
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What is a neuron ? (Scan EM, 6000x) Cajal’s drawing 1904 Basic structural unit of the nervous system ( the foundation of modern neuroanatomy ) Sends both electrical (action potential) and chemical (neurotransmitters) signals Neurons do not divide
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Structure of a Neuron Dendrite Cell body (soma) Myelin sheaths Axon Node of Ranvier Motor Neuron
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Site where information is passed from one neuron to others or other cells. One neuron passes information by
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PAS2201F08 U-5 L-1 Nervous system fundamentals - Nervous...

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