This results first in depolarization, the loss, and b. Nerve impulse conduction in which the impulse jumps from neurofibral node to node is called saltatory conduction. The propagation speed of a nerve impulse is not related to stimulus strength. Larger-diameter fibers conduct impulses faster than those with smaller diameters. Myelinated fibers conduct impulses faster than unmyelinated fibers.
Nerve fibers conduct impulses faster when warmed and slower when cooled.
Comparison of Nerve and Muscle Action Potentials a. The mechanism is the same, but the entire muscle cell membrane conducts the action potential whereas only the axon of the neuron performs this function. In the neuron the AP is initated at the hillock, however in the muscle cell it starts at the neuromuscular junction. Amplitude of the AP is usually the same, but that of the GP is proportional to the stimulus intensity. The location of these potentials depends on the position of the respective channels.