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The cholinergic neuron may also play a role in time memory, and the ability of an individual to form a memory around a certain time of day, which is known as "time stamping". [8] The cholinergic system is characterized by high acetylcholine release during the active phase of an individual’s circadian rhythm. [8]
Cholinergic agents are compounds which mimic the action of acetylcholine and/or butyrylcholine. [1] In general, the word " choline " describes the various quaternary ammonium salts containing the N , N , N -trimethylethanolammonium cation .
A neuromuscular junction (or myoneural junction) is a chemical synapse between a motor neuron and a muscle fiber. [1] It allows the motor neuron to transmit a signal to the muscle fiber, causing muscle contraction. [2] Muscles require innervation to function—and even just to maintain muscle tone, avoiding atrophy.
In the nervous system, a synapse [1] is a structure that allows a neuron (or nerve cell) to pass an electrical or chemical signal to another neuron or a target effector cell. Synapses can be classified as either chemical or electrical, depending on the mechanism of signal transmission between neurons.
Acetylcholine is a choline molecule that has been acetylated at the oxygen atom. Because of the charged ammonium group, acetylcholine does not penetrate lipid membranes. . Because of this, when the molecule is introduced externally, it remains in the extracellular space and at present it is considered that the molecule does not pass through the blood–brain
Choline is a direct precursor of acetylcholine (ACh), a neurotransmitter of the central and peripheral nervous system that regulates a variety of autonomic, cognitive, and motor functions. SLC5A7 is a Na(+)- and Cl(-)- dependent high-affinity transporter that mediates the uptake of choline for acetylcholine synthesis in cholinergic neurons. [5] [6]
The events of the synaptic vesicle cycle can be divided into a few key steps: [10] 1. Trafficking to the synapse. Synaptic vesicle components in the presynaptic neuron are initially trafficked to the synapse using members of the kinesin motor family. In C. elegans the major motor for synaptic vesicles is UNC-104. [11]
In humans, AChE is a cholinergic enzyme involved in the hydrolysis of the neurotransmitter acetylcholine (ACh) into its constituents, choline, and acetate. [20] Overall, in mammals, AChE is primarily involved in the termination of impulse transmission at cholinergic synapses by rapid hydrolysis of the neurotransmitter acetylcholine. [20]