- Published on
Medical Physiology - Propagation of the Action Potential
Usually activates nearby areas of the mem-brane, an action potential generated at any one site causes propagation of the action potential. The depolarization process thus follows the whole length of the fiber. A nerve or muscle impulse is the depolarization process transmitted along a nerve or muscle fiber. • Propagation direction of interest. An excitable membrane lacks a single direction of propagation; instead, the action potential moves both away from the stimulus in both directions. • All-or-nothing concept. Once an action potential has been generated at any place on the membrane of a normal fiber, the depolarization process travels over the whole membrane if conditions are correct, or it might not travel at all if conditions are not right.
Usually activates nearby areas of the mem-brane, an action potential generated at any one site causes propagation of the action potential. The depolarization process thus follows the whole length of the fiber. A nerve or muscle impulse is the depolarization process transmitted along a nerve or muscle fiber. • Propagation direction of interest. An excitable membrane lacks a single direction of propagation; instead, the action potential moves both away from the stimulus in both directions. • All-or-nothing concept. Once an action potential has been generated at any place on the membrane of a normal fiber, the depolarization process travels over the whole membrane if conditions are correct, or it might not travel at all if conditions are not right.
0 Comments
