In physiology, a stimulus is a detectable change in the internal or external environment.

When a stimulus is applied to a sensory receptor, it elicits or influences a reflex via stimulus transduction.

A stimulus is often the first component of a homeostatic control system.

When a sensory nerve and a motor nerve communicate with each other, it is called a nerve stimulus.

See also

• Stimulation

Neurophysiology

Stimulus | Reiz | Stiimul | Stimulus | Стимул | Stimulus | 刺激