Gaba Neurotransmission
Gaba Neurotransmission - Related Videos
01:27
Adrenergic Neurons: Neurotransmission
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2023
Postganglionic sympathetic fibers (except those supplying the sweat glands) releasing noradrenaline or norepinephrine are called noradrenergic or adrenergic neurons. Noradrenaline, dopamine, adrenaline, or epinephrine are collectively called "catecholamines" as they contain a catechol moiety and an amine side chain. The five stages of neurotransmitter release involve their synthesis, storage, release, reuptake and metabolism. Synthesis: Catecholamine synthesis requires tyrosine, which is taken...
07:41
Modeling Fast-scan Cyclic Voltammetry Data from Electrically Stimulated Dopamine Neurotransmission Data Using QNsim1.0
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Cited by 2 •
2017
Fast-scan cyclic voltammetry can monitor in vivo dopamine neurotransmission in the context of drugs, disease, and other experimental manipulations. This work describes the implementation of QNsim1.0, a software to model electrically stimulated dopamine responses according to the quantitative neurobiological model to quantify estimates of dopamine release and reuptake dynamics.
04:17
Electrophoretic Delivery of GABA into the Epileptic Focus of an Anesthetized Mouse
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2025
Source: Slezia, A. et al. Electrophoretic Delivery of γ-aminobutyric Acid (GABA) into Epileptic Focus Prevents Seizures in Mice. J. Vis. Exp. (2019)This video demonstrates the electrophoretic delivery of gamma-aminobutyric acid (GABA) to inhibit seizure activity in an anesthetized mouse. It outlines the steps involved in probe implantation, neural activity recording, seizure induction, and controlled GABA delivery via a microfluidic ion pump to assess its therapeutic efficacy.
01:23
Cholinergic Neurons: Neurotransmission
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2023
Cholinergic neurotransmission involves the synthesis and the release of acetylcholine (ACh) in order to transmit nerve impulses across the synapse. The process begins with the synthesis of acetyl CoA, a precursor for ACh, from ATP, acetate, and coenzyme A in the mitochondria. Choline, another vital precursor, is transported inside the neuron through choline transporters, including high-affinity choline transporter CHT1, low-affinity choline transporter CTL1, and lower-affinity choline...
03:37
Recording Whole-Cell Currents with GABA Puffing in a Mouse Brain Slice
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2025
This video demonstrates the recording of whole-cell currents induced by gamma-aminobutyric acid, or GABA, in a mouse prefrontal cortical brain slice. Controlled delivery of GABA opens chloride channels in a postsynaptic neuron, generating inhibitory postsynaptic currents, or IPSCs. These IPSCs increase with higher GABA concentrations, reflecting GABA's inhibitory activity on synaptic transmission.
FAQs
GABA-A receptors produce rapid inhibition because they are ligand-gated chloride channels that quickly hyperpolarize neurons. GABA-B receptors act more slowly as G protein-coupled receptors, reducing calcium entry and promoting potassium efflux. This distinction helps pharmacologists separate fast control of neuronal excitability from slower inhibitory signaling when analyzing drug effects on the central nervous system.
GABA-mediated inhibition limits neuronal excitability, so changes in this signaling system can shift the balance between excitation and inhibition. Pharmacological studies examine that shift to understand conditions associated with disrupted neural regulation, including anxiety, epilepsy, sleep disturbances, and muscle spasticity. The receptor pathways provide distinct points for interpreting how interventions alter neural activity.
These ion movements provide the functional basis for inhibitory signaling through different receptor classes. GABA-A receptor activation rapidly hyperpolarizes neurons through chloride channels, whereas GABA-B signaling inhibits calcium entry and promotes potassium efflux. Comparing these mechanisms clarifies why GABA responses can differ in speed and how each pathway contributes to reducing neuronal excitability.
The system links receptor-level actions with changes in neural activity, allowing pharmacologists to examine how benzodiazepines, barbiturates, anesthetics, and baclofen influence inhibition. Because GABA-A and GABA-B receptors use different signaling mechanisms, studies can relate drug effects to rapid chloride-channel responses or slower G protein-coupled pathways, depending on the compound and research question.
Benzodiazepines, barbiturates, anesthetics, and baclofen are studied in relation to GABA signaling because they alter neural activity through a system that regulates neuronal excitability. Examining these agents provides pharmacological context for inhibitory neurotransmission and supports investigation of therapeutic or physiological questions involving anxiety, epilepsy, sleep, and muscle spasticity.
Research can use GABA signaling to investigate how altered inhibition contributes to anxiety, epilepsy, sleep-related problems, and muscle spasticity. It can also compare the consequences of engaging fast GABA-A pathways with those of activating slower GABA-B pathways. These approaches help connect receptor mechanisms with broader changes in central nervous system activity and excitation-inhibition balance.