Acetylcholine:

Watch this 2-Minute Neuroscience video to learn more about acetylcholine.

neurotransmitter in the central and peripheral nervous systems. Acetylcholine is essential to the production of movement through acting at neuromuscular junctions in the peripheral nervous system. It also has a number of functions in the central nervous system, and is thought to be involved in attention, memory, and a variety of other processes. The adjective cholinergic is often used to describe structures and/or activity associated with acetylcholine.