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Synaptic Transmission. Electrical & Chemical Synapses Electrical & Chemical Synapses.

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Presentation on theme: "Synaptic Transmission. Electrical & Chemical Synapses Electrical & Chemical Synapses."— Presentation transcript:

1 Synaptic Transmission

2 Electrical & Chemical Synapses Electrical & Chemical Synapses

3 Events Involved in Transmission at a Chemical Synapse

4 Local Recycling of Synaptic Vesicles in Presynaptic Terminals

5 Presynaptic Proteins Implicated in Neurotransmitter Release

6 Molecular Mechanisms of Neurotransmitter Release

7

8 Diseases that Affect the Presynaptic Terminal Lambert-Eaton myasthenic syndrome = Ab mediated Several congenital forms result in fewer or smaller vesicles = less transmitter

9 Toxins That Affect Transmitter Release Toxins cleave SNAREs Tetanus affects inhibitory interneurons = hyperexcitation of muscles Botulism paralyzes peripheral muscles = do not contract

10 Toxins That Affect Transmitter Release Black widow venom = exocytosis w/o calcium Binds to CL1 and neurexin, neurexin binds to synaptotagmin

11 Diseases Caused by Altered Ion Channels FHM = familial hemiplegic migraine EA2 = episodic ataxia CSNB = congenital stationary night blindness


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