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Related Concept Videos

Cholinergic Neurons: Neurotransmission01:23

Cholinergic Neurons: Neurotransmission

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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...
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Parasympathetic Signaling01:30

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Parasympathetic signaling plays a crucial role in regulating various physiological processes. It involves the release of acetylcholine (ACh) by parasympathetic neurons, which can have localized and short-lived effects. The majority of ACh released is rapidly inactivated at the synapse by the enzyme acetylcholinesterase (AChE), which hydrolyzes Ach into choline and acetate. Additionally, the tissue cholinesterase deactivates any ACh diffusing into the surrounding tissues.
The effects of...
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Cholinergic Receptors: Nicotinic01:15

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Nicotinic receptors are ligand-gated ion channels that are activated by acetylcholine and nicotine. Upon activation, they cause a rapid increase in the permeability of cells to K+, Na+, and Ca2+, followed by depolarization and excitation. They are in the autonomic ganglia, skeletal neuromuscular junction, CNS, and adrenal medulla.
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Cholinergic Receptors: Muscarinic01:25

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The pharmacological actions of acetylcholine are elicited via its binding to two families of cholinergic receptors or cholinoceptors, namely, muscarinic and nicotinic receptors. Muscarinic receptors are G protein-coupled receptors and have five subtypes, M1–M5. All mAChR subtypes are activated by acetylcholine and blocked by the antagonist, atropine. 
The subtypes M1, M3, and M5 couple with the Gq subunit and activate the phospholipase C (PLC) activity, mobilizing intracellular Ca2+....
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Direct-Acting Cholinergic Agonists: Pharmacological Actions00:59

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Direct-acting cholinergic agonists exert their pharmacological actions by mimicking the effects of acetylcholine on postsynaptic muscarinic receptors to generate parasympathetic responses. These agents elicit a range of physiological responses, including cardiovascular effects. For example, activation of muscarinic receptors induces bradycardia, decreased cardiac output, reduced peripheral resistance, and consequent hypotension. In the eye, stimulation of M3 receptors leads to smooth muscle...
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Cholinergic Antagonists: Pharmacological Actions01:28

Cholinergic Antagonists: Pharmacological Actions

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Antimuscarinic drugs block muscarinic receptors in multiple systems, including the gut, eye, smooth muscles, respiratory tract, cardiovascular, and central nervous systems. They produce similar effects with varying selectivity depending on the specific agent and tissue. Here are the key pharmacological actions of antimuscarinics:
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Optical Control of a Neuronal Protein Using a Genetically Encoded Unnatural Amino Acid in Neurons
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Cholinergic Control of Information Coding.

Jochem van Kempen1, Stefano Panzeri2, Alexander Thiele1

  • 1Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK.

Trends in Neurosciences
|July 12, 2017
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Summary
This summary is machine-generated.

Increasing cortical acetylcholine (ACh) levels can improve how neuronal populations code information. This study reveals how ACh alters neural firing correlations to enhance coding efficiency, a key area in neuroscience research.

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Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Systems Neuroscience

Background:

  • Neuronal population activity is crucial for information processing.
  • Specific firing rate correlations can impede efficient neural coding.
  • Understanding mechanisms that optimize neural coding is a significant research challenge.

Purpose of the Study:

  • To investigate the role of cortical acetylcholine (ACh) in modulating neural population coding.
  • To determine how ACh influences the correlation structure of neuronal firing.
  • To assess the impact of ACh-induced correlation changes on information coding efficiency.

Main Methods:

  • Experimental manipulation of cortical acetylcholine levels.
  • Analysis of neuronal firing patterns and population activity.
  • Quantification of correlation structures within neuronal ensembles.
  • Assessment of information coding capacity in neuronal populations.

Main Results:

  • Increased cortical ACh levels were found to alter specific aspects of population correlation structure.
  • These alterations in neural correlations led to improved population-coding abilities.
  • The study identified a direct link between ACh modulation and enhanced neural information processing.

Conclusions:

  • Cortical acetylcholine plays a critical role in optimizing neural information coding.
  • Modulating ACh levels offers a potential strategy to enhance neuronal population function.
  • This research provides new insights into the neural mechanisms underlying efficient information processing.