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Central actions of benzodiazepines: general introduction
The British Journal of Psychiatry : the Journal of Mental Science
|September 1, 1978
Summary
Benzodiazepines facilitate inhibitory neurotransmission by enhancing GABA ergic synapses in the central nervous system. This action impacts various brain regions, influencing both presynaptic and postsynaptic inhibition.
Area of Science:
- Neuroscience
- Pharmacology
Background:
- Benzodiazepines are known for their somatic and psychotropic effects.
- Their precise mechanism of action on inhibitory neurotransmission requires further elucidation.
Purpose of the Study:
- To present evidence for the specific facilitatory action of benzodiazepines on GABA ergic synapses.
- To explore the implications for understanding benzodiazepine binding sites and their mode of action.
Main Methods:
- Review of characteristic somatic and psychotropic effects.
- Presentation of evidence supporting facilitatory action on GABA ergic synapses.
- Discussion of implications from benzodiazepine binding site studies.
Main Results:
- Benzodiazepines enhance presynaptic and postsynaptic inhibition in various central nervous system regions.
- These effects are mediated by GABA ergic intrinsic and projection neurons.
- Inhibition is enhanced in the spinal cord, dorsal column nuclei, hippocampus, hypothalamus, cerebral cortex, cerebellar cortex, substantia nigra, and lateral vestibular nucleus.
Conclusions:
- Benzodiazepines exert a specific facilitatory action on GABA ergic synapses.
- Further research is needed to pinpoint the exact site of action and identify potential endogenous ligands.
- Understanding benzodiazepine binding sites is crucial for a deeper comprehension of their mechanism of action.