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CNS Pharmacology

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Question:

Inhibitory pathway

Author: Suzuki



Answer:

1) Stimulation of inhibitory neurons releases neurotransmitter molecules, such as γ-aminobutyric acid (GABA) or glycine, which bind to receptors on the postsynaptic cell membrane. This causes a transient increase in the permeability of specific ions, such as potassium (K+) and chloride (Cl–) ions. 2) The influx of Cl– and efflux of K+ cause a weak hyperpolarization, or IPSP, that moves the postsynaptic potential away from its firing threshold. This diminishes the generation of action potentials.


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Suzuki
Suzuki