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Neuromuscular junctions (motor end plates)

Contraction of skeletal muscle is initiated by depolarization of the sarcolemma at the neuromuscular junction (NMJ) or motor end plate, a specialized synapse between axon terminals and the sarcolemma beneath them. Here, several axons are terminating in neuromuscular junctions on skeletal muscle fibers. The motor neuron plus all the skeletal muscle fibers it innervates is a motor unit. 400x

Neuromuscular junctions <p>Contraction of skeletal muscle is initiated by depolarization of the sarcolemma at the neuromuscular junction (NMJ) or motor end plate, a specialized synapse between axon terminals and the sarcolemma beneath them. Here, several axons are terminating in neuromuscular junctions on skeletal muscle fibers. The motor neuron plus all the skeletal muscle fibers it innervates is a motor unit. 400x</p>

Neuromuscular junctions

Contraction of skeletal muscle is initiated by depolarization of the sarcolemma at the neuromuscular junction (NMJ) or motor end plate, a specialized synapse between axon terminals and the sarcolemma beneath them. Here, several axons are terminating in neuromuscular junctions on skeletal muscle fibers. The motor neuron plus all the skeletal muscle fibers it innervates is a motor unit. 400x

Axons <p>Contraction of skeletal muscle is initiated by depolarization of the sarcolemma at the neuromuscular junction (NMJ) or motor end plate, a specialized synapse between axon terminals and the sarcolemma beneath them. Here, several axons are terminating in neuromuscular junctions on skeletal muscle fibers. The motor neuron plus all the skeletal muscle fibers it innervates is a motor unit. 400x</p>

Axons

Contraction of skeletal muscle is initiated by depolarization of the sarcolemma at the neuromuscular junction (NMJ) or motor end plate, a specialized synapse between axon terminals and the sarcolemma beneath them. Here, several axons are terminating in neuromuscular junctions on skeletal muscle fibers. The motor neuron plus all the skeletal muscle fibers it innervates is a motor unit. 400x

Skeletal muscle fibers <p>Contraction of skeletal muscle is initiated by depolarization of the sarcolemma at the neuromuscular junction (NMJ) or motor end plate, a specialized synapse between axon terminals and the sarcolemma beneath them. Here, several axons are terminating in neuromuscular junctions on skeletal muscle fibers. The motor neuron plus all the skeletal muscle fibers it innervates is a motor unit. 400x</p>

Skeletal muscle fibers

Contraction of skeletal muscle is initiated by depolarization of the sarcolemma at the neuromuscular junction (NMJ) or motor end plate, a specialized synapse between axon terminals and the sarcolemma beneath them. Here, several axons are terminating in neuromuscular junctions on skeletal muscle fibers. The motor neuron plus all the skeletal muscle fibers it innervates is a motor unit. 400x

Main Slide Neuromuscular junctions Axons Skeletal muscle fibers