part_of part of part of neurotransmitter secretion regulation of skeletal muscle contraction regulation of skeletal muscle contraction by neural stimulation via neuromuscular junction neurotransmitter secretion involved in regulation of skeletal muscle contraction neurotransmitter secretion involved in control of skeletal muscle contraction biological_process GO:0014860 The regulated release of neurotransmitter into the synaptic cleft involved in skeletal muscle contraction. A neurotransmitter is any of a group of substances that are released on excitation from the axon terminal of a presynaptic neuron of the central or peripheral nervous system and travel across the synaptic cleft to either excite or inhibit the target cell. Among the many substances that have the properties of a neurotransmitter are acetylcholine, noradrenaline, adrenaline, dopamine, glycine, gamma aminobutyrate, glutamic acid, substance P, enkephalins, endorphins and serotonin.