Intro to NS 2010

Intro to NS 2010 - PGY 451/551 Fall 2010 Dr. Baizer for my...

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PGY 451/551 Fall 2010 Dr. Baizer for my section: exam questions are lecture-based use the book if it helps you understand the material not responsible for anything in the book we do not cover in class you ARE responsible for all material covered in lectures office hours by appointment- call or email for a time please do not ask content questions by email
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Click to edit Master subtitle style INTRODUCTION TO CENTRAL NERVOUS SYSTEM ORGANIZATION
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STRUCTURE OF THE NERVOUS SYSTEM building blocks of the nervous system are neurons many different sizes and shapes, but most share some basic elements: soma (cell body), nucleus and “processes” (fibers emerging from the cell body) 2 types of processes dendrites axons (often covered by myelin) diameter of cell body 10-60 microns, µm (1000 µm /mm)
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examples of different sizes and shapes of neurons neurons in many, many different species have these same basic characteristics
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SIGNALLING IN NEURONS neurons communicate by electrical and chemical signalling within a cell: electrical from one cell to another: chemical SYNAPSE is the functional junction between two neurons direction of information transfer is from presynaptic cell to postsynaptic cell
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SYNAPSES axons travel to the next cell, branch and the axon terminals form synapses on the postsynaptic cell (dendrites, soma or axon) {*exceptions: retina, inner ear*} postsynaptic cell presynaptic terminal PRESYNAPTIC CELL 3 POSTSYNAPTIC CELLS 10,000 angstroms/micron
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This note was uploaded on 02/22/2011 for the course PGY 451 taught by Professor Baizer during the Spring '09 term at SUNY Buffalo.

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Intro to NS 2010 - PGY 451/551 Fall 2010 Dr. Baizer for my...

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