nerve impulse

A nerve impulse is an electrical signal that travels along nerve fibers to communicate information throughout the body. It begins when a nerve cell (neuron) detects a stimulus, causing a rapid change in electrical charge across its membrane. This change propagates along the neuron as a wave, allowing signals like pain, touch, or commands from the brain to reach their target. The process involves the movement of ions (charged particles) in and out of the neuron, creating the electrical signal. Once the impulse reaches its destination, it triggers a response, such as muscle contraction or a reflex action.