A. Describe the the nerve conduction/depolarization process from the nerve receiving the stimulatory impulse (somatic motor neuron) to the activity in the synapse (motor cortex in cerebrum to sternocleidomastoid muscle), assume myelinated nerve. B. Describe the process occurring in the synapse. C. Once the neurotransmitter has crossed the NMJ above, describe the depolarization process in the skeletal muscle..