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Acetylcholine is the primary neurotransmitter of the parasympathetic nervous system. [2] [3] In the brain, acetylcholine functions as a neurotransmitter and as a neuromodulator. The brain contains a number of cholinergic areas, each with distinct functions; such as playing an important role in arousal, attention, memory and motivation. [4]
A cholinergic neuron is a nerve cell which mainly uses the neurotransmitter acetylcholine (ACh) to send its messages. Many neurological systems are cholinergic.Cholinergic neurons provide the primary source of acetylcholine to the cerebral cortex, and promote cortical activation during both wakefulness and rapid eye movement sleep. [1]
Acetylcholine also operates in many regions of the brain as a neuromodulatory, but using different types of receptors, including nicotinic and muscarinic receptors. [26] Dopamine has a number of important functions in the brain. This includes critical role in the reward system, motivation and emotional arousal.
The parasympathetic nervous system, which uses acetylcholine almost exclusively to send its messages, is said to be almost entirely cholinergic. Neuromuscular junctions, preganglionic neurons of the sympathetic nervous system, the basal forebrain, and brain stem complexes are also cholinergic, as are the receptor for the merocrine sweat glands.
Muscarinic acetylcholine receptors are also present and distributed throughout the local nervous system, in post-synaptic and pre-synaptic positions. There is also some evidence for postsynaptic receptors on sympathetic neurons allowing the parasympathetic nervous system to inhibit sympathetic effects.
It’s a building block of acetylcholine, an important neurotransmitter that sends messages throughout the brain and nervous system. Studies have linked higher choline intake to better cognitive ...