09-03-2010 - Synapse Hhe synaptic properties T istory about...

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Synapse History about its discovery Synapse structure The synaptic properties The neurotransmitters
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Synaptic properties 1. One-way conduction 2. Synaptic delay 3. Synaptic summation 4. Convergence and divergence 5. Synaptic fatigue 6. “Quantal” nature of synaptic transmission
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1. One-way conduction Synapses generally permit conduction of impulses in one-way i.e. from pre- synaptic to post-synaptic neuron. Synaptic properties Synaptic properties
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2. Synaptic delay The time for transmission across the synapse. Discharge of transmitter by pre-synaptic terminal Diffusion of transmitter to post-synaptic membrane Action of transmitter on its receptor Action of transmitter to membrane permeability Increased Na+ permeability to post-synaptic potential Synaptic properties Synaptic properties
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3. Synaptic summation a) Spatial summation. When EPSPs are in more than one synaptic terminal at same time. b) Temporal summation. If EPSP in pre-synaptic terminal are successively repeated without significant delay so the effect of the previous stimulus is summated to the next Synaptic properties Synaptic properties
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Synaptic summation Figure 11.21
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4. Convergence and divergence
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This note was uploaded on 09/19/2010 for the course BIOS 286 taught by Professor Murphy during the Fall '06 term at Ill. Chicago.

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09-03-2010 - Synapse Hhe synaptic properties T istory about...

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