File:Neuromuscular junction cartoon 01.jpg
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Neuromuscular Junction
Neuromuscular Junction or motor end plate is the area of contact between the end of a motor neuron and a skeletal muscle cell.
Small branches of the motor nerve form contacts (boutons) with the muscle cell in a roughly eliptical area.
Acetylcholine - excitatory transmitter released by motor neuron terminal.
Synaptic cleft - space between the boutons and the muscle fibre.
Secondary synaptic clefts - numerous infoldings of the skeletal muscle sarcolemma in the area of the motor end plate.
Motor end plates typically concentrate in a narrow zone close to the middle of the belly of a muscle.
The excitable sarcolemma of skeletal muscle cells will allow the stimulus to spread, from this zone, over the entire muscle cell.
Cite this page: Hill, M.A. (2026, October 4) Embryology Neuromuscular junction cartoon 01.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Neuromuscular_junction_cartoon_01.jpg
- © Dr Mark Hill 2026, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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