Akademik

nerve impulse n the progressive physicochemical change in the membrane of a nerve fiber that follows stimulation and serves to transmit a record of sensation from a receptor or an instruction to act to an effector called also nervous impulse

the electrical activity in the membrane of a neurone that - by its rapid spread from one region to the next - is the means by which information is transmitted within the nervous system along the axons of the neurones. The membrane of a resting nerve is charged (polarized) because of the different concentrations of ions inside and outside the cell. When a nerve impulse is triggered, a wave of depolarization spreads, and ions flow across the membrane (see action potential). Until the nerve has undergone repolarization no further nerve impulses can pass.