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In physiology, a stimulus [1] is a change in a living thing's internal or external environment. This change can be detected by an organism or organ using sensitivity, and leads to a physiological reaction. [ 2 ]
A stimulus is something that causes a physiological response. It may refer to: Stimulation. Stimulus (physiology), something external that influences an activity; Stimulus (psychology), a concept in behaviorism and perception; Stimulus (economics) For government spending as stimulus, see Fiscal policy
Stimulation, in general, refers to how organisms perceive incoming stimuli. As such it is part of the stimulus-response mechanism. Simple organisms broadly react in three ways to stimulation: too little stimulation causes them to stagnate, too much to die from stress or inability to adapt, and a medium amount causes them to adapt and grow as they overcome it.
Physiology (/ ˌ f ɪ z i ˈ ɒ l ə dʒ i /; from Ancient Greek φύσις (phúsis) 'nature, origin' and -λογία () 'study of') [1] is the scientific study of functions and mechanisms in a living system.
The sweep technique is a hybrid frequency domain/time domain technique. [16] A plot of, for example, response amplitude versus the check size of a stimulus checkerboard pattern plot can be obtained in 10 seconds, far faster than when time-domain averaging is used to record an evoked potential for each of several check sizes. [16]
The collective firing pattern of the sensory neurons will inform the nervous system about the stimulus properties. Range fractionation is a term used in biology to describe the way by which a group of sensory neurons are able to encode varying magnitudes of a stimulus.
The stimulus–response model emphasizes the relation between stimulus and behavior rather than an animal's internal processes (i.e., in the nervous system). [2] In experimental psychology, a stimulus is the event or object to which a response is measured. Thus, not everything that is presented to participants qualifies as stimulus.
When stimulus delivery technology is not properly shielded, the electromagnetic acoustic transducer may induce the stimulus directly into the electrodes. This is known as a stimulus artifact, and researchers and clinicians seek to avoid it, as it is a contamination of the true recorded response of the nervous system.