stimulus
in physiology, a detectable change in the internal or external surroundings
intermittent photic stimulation
neuroimaging technique
aversive
unpleasant stimulus that induces changes in behavior through punishment
vernalization
induction of a plant's flowering process
noxious stimulus
actually or potentially tissue damaging event, may be mechanical, chemical or thermal
sensation
notable or extraordinary event
disruption
event which interferes with an ongoing process
bounty
payment or reward
sensory cue
portion of a perceptual field or pattern of stimuli to which a subject has learned to respond