A stimulus is anything that can trigger a physical or behavioral change. The plural of stimulus is stimuli.
Stimuli can be external or internal.
An example of external stimuli:
- Your body responding to a medicine
An example of internal stimuli:
- Your vital signs changing due to a change in the body
- Temperature changes
Taber's Cyclopedic Medical Dictionary, 23rd ed. F.A. Davis Company; 2017. www.tabers.com/tabersonline/. Accessed January 26, 2017.
Reviewed By: Linda J. Vorvick, MD, Clinical Associate Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.