Describe the Process of Muscle Contraction
A signal sent by the central nervous system via motor neuron initiates muscle contraction. Skeletal muscle contraction begins first at the neuromuscular junction which is the synapse between a motoneuron and a muscle fiber. 6 4 Muscle Contraction Medicine Libretexts The neuromuscular junction is a junction between a neuron and the sarcolemma of the muscle fibre. . Brain sends an impulse. Muscle contraction is initiated by signals that travel along the axon and reach the neuromuscular junction or motor end plate. Sliding Filament Theory of Muscle Contraction. Current biochemical studies suggest that the myosin cross-bridge exists in two main conformations. Steps to Muscle Contraction. This process is known as the sliding filament model of muscle contraction Figure 6. The process of muscle contraction. To initiate muscle contraction tropomyosin has to expose the myosin-binding site on an actin filament to al...