Neurotransmission Blockade
Neurotransmission Blockade - Related Videos
01:29
Neuromuscular Junction And Blockade
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2025
The site of chemical communication between a motor neuron and a muscle fiber is called the neuromuscular junction (NMJ). The end of the motor neuron at the NMJ divides into a cluster of synaptic end bulbs. The cytoplasm of these bulbs consists of synaptic vesicles enclosing acetylcholine molecules, the principal neurotransmitter released at the NMJ. The region opposite the synaptic bulb that ends in the muscle fiber is called the motor end plate, which has acetylcholine receptors. Within the...
08:50
Deep Neuromuscular Blockade Leads to a Larger Intraabdominal Volume During Laparoscopy
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Cited by 49 •
2013
This article presents a method for measuring the working abdominal volume during laproscopic myomectomy using the surgical grasper, and applies this technique to obtain pilot data on whether deep neuromuscular blockade (NMB) can enable the use of lower insufflation pressure. Reduced insufflation pressure during laproscopic surgery has been shown to reduce post-operative pain, and thus the use of NMB during surgery may enable improved patient outcomes.
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.
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...
FAQs
Release blockade acts before a neurotransmitter reaches the synaptic space, whereas receptor blockade acts at the receiving cell. The first limits the signal available for detection, while the second prevents an available neurotransmitter from producing its usual receptor-mediated effect. Comparing these sites of action helps researchers distinguish presynaptic from postsynaptic contributions to reduced neural communication.
Ion channels help convert receptor activity into changes in the receiving cell. Altering their activity can therefore weaken the electrical response even when neurotransmitter release and receptor binding still occur. This mechanism gives researchers a way to examine how chemical signaling is coupled to cellular excitability and to determine which stage most strongly influences the resulting postsynaptic response.
Faster removal shortens the time that a neurotransmitter remains in the synaptic space. As a result, receptors have less opportunity to respond, which can reduce the strength or duration of postsynaptic signaling. This mechanism is distinct from directly blocking release or receptor binding, so it helps separate signal clearance from the production and reception of neural messages.
Researchers can use the different blockade mechanisms to associate a reduced postsynaptic response with a particular stage of communication. Effects linked to release, receptor binding, ion-channel activity, or neurotransmitter removal provide different clues about synaptic function. This approach supports analysis of how individual neurotransmitters contribute to signaling rather than treating the entire neural response as a single process.
Reducing communication at selected points can help researchers examine how signals move through interconnected neurons and target cells. Observing the consequences for a circuit provides context beyond an individual synapse, including how local signaling contributes to broader neural activity. This makes blockade useful for investigating circuit organization and the functional roles of specific neurotransmitters in biology.
The approach is relevant when pharmacological agents alter sensation, movement, cognition, or autonomic function. Studying those changes can connect modified synaptic communication with observable nervous-system effects. It also supports investigation of neurological disorders by helping researchers examine how disrupted neurotransmitter signaling or altered responses may relate to changes in neural function.