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Download MBBS Physiology Presentations 17 Synapse Lecture Notes

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This post was last modified on 08 April 2022

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Synaptic transmission

Otto Loewi 1926


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Synapse Types

? Anatomical
Axodendritic, axosomatic, axoaxonic
? Physiological

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Electrical, chemical
? Functional
Excitatory, inhibitory, modulatory

Electrical vs Chemical Synapse

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Vesicle recycling


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Synaptic

vesicle

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Mechanism of NT release



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Endocytosis (vesicle formation)

Post Synaptic Potential
? EPSP

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? IPSP


Fate of Neurotransmitter

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? Enzymatic

degradation

? Glial cell uptake

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? Diffussion
? Presynaptic

uptake

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Properties

? Delay

? One way conduction

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? Summation- temporal / spatial

? Facilitation

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? Occulusion

? Synaptic inhibition ?

presynaptic,

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postynaptic

feedback (renshaw cel )

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feedforward
Synaptic

plasticity

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Potentiatio

n

Depression

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Short term

Long Term

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Short Term

Long Term

augmentati

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Post Tetanic

Habituatio

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on

Potentiation

LTP

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n

LTD

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