Definition of nerve impulse
: 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
First Known Use of nerve impulse
NERVE IMPULSE Defined for Kids
Definition of nerve impulse for Students
: an electrical signal carried by nerve cells which relays information from the body's sense organs to the brain and spinal cord or instructions from the brain and spinal cord to a body part (as a muscle or gland)
Medical Definition of nerve impulse
: an electrical signal that travels along a nerve fiber in response to a stimulus and serves to transmit a record of sensation from a receptor or an instruction to act to an effector : the propagation of an action potential along the length of a neuron ◆A nerve impulse occurs when a stimulus exceeds a certain threshold resulting in the movement of positively charged sodium ions across the cell membrane of a neuron so that the electrical charges inside and outside the membrane are temporarily reversed.
Learn More about nerve impulse
Britannica.com: Encyclopedia article about nerve impulse
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