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Cholinergic Neurons: Neurotransmission

Cholinergic Neurons: Neurotransmission

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...

Neurotransmitters

Neurotransmitters

Neurotransmitters are essential chemical messengers within the nervous system, facilitating the communication between neurons. These chemical messengers, varying in function and effect, are critical for sustaining various aspects of neurological health and emotional well-being.

Neurotransmitters

Neurotransmitters

Neurotransmitters play a crucial role in the communication between neurons in the autonomic nervous system. Neurons in the autonomic nervous system can be cholinergic or adrenergic depending on the neurotransmitters synthesized. Cholinergic neurons use acetylcholine as their primary neurotransmitter. This includes all the preganglionic fibers of the sympathetic and pre- and postganglionic fibers of the parasympathetic nervous systems. In addition, neurons of the somatic nervous system also use...

Role of Neurotransmitters in Memory

Role of Neurotransmitters in Memory

Neurotransmitters are integral to the brain's communication system, enabling neurons to transmit signals across synapses. This chemical exchange underpins various cognitive functions, including memory processes. The role of neurotransmitters in memory is multifaceted, influencing the encoding, consolidation, and retrieval of memories through their action on different neural circuits.
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Chemical Synapses

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Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...

Chemical Synapses

Chemical Synapses

Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...

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Related Experiment Video

Updated: Jun 13, 2026

Probing Nicotinic Acetylcholine Receptor Function in Mouse Brain Slices via Laser Flash Photolysis of Photoactivatable Nicotine

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Published on: January 25, 2019

Acetylcholine in Brain-Body Communication: Biological Mechanisms and Physiological Roles.

Yuan Gao¹, Tian Zhou¹, Xinsheng Lai^2,3

¹HuanKui Academy, Jiangxi Medical College, Nanchang University, Nanchang 330031, China.

International Journal of Molecular Sciences

|June 12, 2026

Summary

Acetylcholine (ACh) is a vital neurotransmitter regulating cognition, motor control, and immune responses. This review details ACh

Keywords:

CNS PNS acetylcholine brain–body axis cholinergic signaling

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A Computerized Test Battery to Study Pharmacodynamic Effects on the Central Nervous System of Cholinergic Drugs in Early Phase Drug Development

A Computerized Test Battery to Study Pharmacodynamic Effects on the Central Nervous System of Cholinergic Drugs in Early Phase Drug Development

Published on: February 11, 2019

Area of Science:

Neuroscience
Molecular Biology
Physiology

Background:

Acetylcholine (ACh) is a crucial neurotransmitter with widespread distribution in both central and peripheral nervous systems.
ACh mediates essential physiological processes, impacting cognition, motor control, autonomic regulation, and immune responses.
Dysregulation of ACh signaling is implicated in various neurological, psychiatric, cardiovascular, and inflammatory diseases.

Purpose of the Study:

To provide a comprehensive review of the biological cycle of acetylcholine (ACh), encompassing synthesis, storage, release, degradation, and reuptake.
To elucidate the regulatory mechanisms governing ACh functions in the nervous system and peripheral organs.
To highlight the pivotal role of ACh in mediating brain-body communication and its implications for health and disease.

Main Methods:

Literature review synthesizing existing research on acetylcholine biology and function.
Analysis of the roles of nicotinic acetylcholine receptors (nAChRs) and muscarinic acetylcholine receptors (mAChRs).
Examination of ACh's involvement in central nervous system functions and peripheral processes.

Main Results:

ACh synthesis, storage, release, degradation, and reuptake form a complete biological cycle.
ACh modulates cognitive functions (learning, memory, attention), motor control, autonomic regulation, and immune responses via nAChRs and mAChRs.
ACh acts as a key mediator in the brain-body axis, facilitating bidirectional communication between the central nervous system and peripheral organs.

Conclusions:

Acetylcholine is a fundamental neurotransmitter essential for numerous physiological processes and intricate brain-body communication.
Understanding cholinergic signaling offers potential therapeutic targets for neurological, psychiatric, cardiovascular, and inflammatory conditions.
Further research into ACh signaling can yield novel insights into physiological regulation and disease pathogenesis.