| 释义 |
DictionarySeestimulusliminal stimulus
thresh·old stim·u·lusa stimulus of threshold strength, that is, one just strong enough to excite.
See also: adequate stimulus. Synonym(s): liminal stimulusstimulusS19-899880 (stim'u-lus) plural.stimuli [L., a goad] 1. A change of environment of sufficient intensity to evoke a response in an organism.2. An excitant or irritant.adequate stimulus1. Any stimulus capable of evoking a response, i.e., an environmental change possessing a certain intensity, acting for a certain length of time, and occurring at a certain rate.2. A stimulus capable of initiating a nerve impulse in a specific type of receptor.chemical stimulusA chemical (liquid, gaseous, or solid) that is capable of evoking a response.conditioned stimulusA stimulus that gives rise to a conditioned response. See: reflex, conditionedelectric stimulusA stimulus resulting from initiation of or cessation of a flow of electrons as from a battery, induction coil, or generator.homologous stimulusA stimulus that acts only on specific sensory end organs.iatrotropic stimulusAny stimulus or event that makes a person seek or receive medical attention, such as a symptom, a physical finding, or the need for a routine or required health screening examination.liminal stimulusThreshold stimulus.mechanical stimulusA stimulus produced by a physical change such as contact with objects or changes in pressure.minimal stimulusThreshold stimulus.nociceptive stimulusA painful and usually injurious stimulus.subliminal stimulusA stimulus that is weaker than a threshold stimulus.thermal stimulusA stimulus produced by a change in skin temperature, a rise giving sensations of warmth, a fall giving sensations of coldness.threshold stimulusThe least or weakest stimulus that is capable of initiating a response or giving rise to a sensation. Synonym: liminal stimulus; minimal stimulusunconditioned stimulusAny stimulus that elicits an unconditioned response (i.e., a response that occurs by reflex rather than by learning). |