Muscarinic receptor agonist
The acetylcholine muscarinic M1 receptor is the most abundant sub-type of the acetylcholine receptor in the brain. When an agonist, such as acetylcholine, binds to this receptor a series of down-stream signaling mechanisms or secondary messengers are initiated. This results in the opening of potassium channels and the propagation of a nerve impulse.
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References
Cholinergic transmission. In: Pharmacology, 4rd edition. Rang HP, Dale MM and Ritter JM. Edinburgh, UK: Harcourt Publishers Ltd, 2001:110–138