تحسس

Also known as sensitisation

Sensitization is a nonspecific phenomenon whereby repeated exposure to a stimulus results in the progressive enhancement of a response. The concept has been studied using the reflexes of animals such as Aplysia to better understand the underlying neural mechanisms. Research on sensitization includes a range of phenomena including drug sensitization and cross-sensitization, where a response is enhanced for a whole class of stimuli in addition to the original repeated stimulus. It has also been implicated in the pathologies of various health disorders.