Dictionary » S » Stimulus

Stimulus

Definition

noun, plural: stimuli

(1) (physiology) A detectable change in the internal or external environment.

(2) (physiology) That which influences or causes a temporary increase of physiological activity or response in the whole organism or in any of its parts.

(3) That which can evoke a response or has an influence on a system to act.


Supplement

Any of the five senses will respond to a particular stimulus. Based on the stimuli applied to the sensory organs, there are two kinds of stimuli:


Word origin: From Latin stimulus (“‘goad, prick’”)

Related terms:


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Results from our forum


Re: Instinctive Behavior and Innate Ideas

I just had a thought that maybe instinctive behavior could be simply a series of stimulus and responses where the response of one is the stimulus for the next and so on until the last response is reached. Could this be a viable model for instinctive (innate) behavior?

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by Gannet
Mon Mar 03, 2014 12:47 pm
 
Forum: General Discussion
Topic: Instinctive Behavior and Innate Ideas
Replies: 1
Views: 1270

Does other animals have faster nerve speeds?

i was thinking, though animals do not have a long chain of thought (ie, stimulus -> brain ->memory -> action); would they have faster nerves speeds or brain speeds, if they had faster brains with low capacity; and if fast enough (relativity) then would ...

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by 1832vin
Wed Feb 05, 2014 9:39 pm
 
Forum: General Discussion
Topic: Does other animals have faster nerve speeds?
Replies: 1
Views: 1360

Effects of variation in Flicker Fusion Thresholds (vision)

... and so on. Of particular interest to me is vision and in particular the flicker fusion threshold (FFR); the frequency at which an intermittent stimulus appears continuous. According to the following article this threshold differs from species to species and seems to relate to both size and ...

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by NMLevesque
Sat Nov 23, 2013 6:47 pm
 
Forum: General Discussion
Topic: Effects of variation in Flicker Fusion Thresholds (vision)
Replies: 0
Views: 1405

Re: what causes us to breathe

Healthy persons breathe because of the increase of CO2 levels-which is the stimulus. A person with COPD for example breathes when the O2 level gets too low, so it is important to monitor how much oxygen (if any) the person is on closely. Too much O2 can cause ...

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by gardengirl7787
Sun Oct 06, 2013 9:58 pm
 
Forum: Human Biology
Topic: what causes us to breathe
Replies: 23
Views: 13287

Re: Re:

Now, I may have not fully understood your example, as to me it still seems that you take the one exit you take based on the stimulus obtained from your environment. . . Determinism is a global thesis; a world is determined if the following three conditions obtain: 1) at all times the ...

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by ughaibu
Sun Apr 07, 2013 9:14 am
 
Forum: Cell Biology
Topic: Do We Have The Freedom Of Choice?
Replies: 27
Views: 27820
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