ecological stimulus

[...]

Control mechanisms

All homeostatic control mechanisms have at least three interdependent components for the variable being regulated: The receptor is the sensing component that monitors and responds to changes in the environment. When the receptor senses a stimulus, it sends information to a control center, the component that sets the range at which a variable is maintained. The control center determines an appropriate response to the stimulus. In most homeostatic mechanisms the control center is the brain. The control center then sends signals to an effector, which can be muscles, organs or other structures that receive signals from the control center. After receiving the signal, a change occurs to correct the deviation by either enhancing it with positive feedback or depressing it with negative feedback ^[7][...]

http://en.wikipedia.org/wiki/Homeostasis

http://en.wikipedia.org/wiki/Stimulus_%28physiology%29

http://en.wikipedia.org/wiki/Subliminal_stimuli

http://en.wikipedia.org/wiki/Absolute_threshold

http://en.wikipedia.org/wiki/Stimulation

http://en.wikipedia.org/wiki/Sensory_overload

http://en.wikipedia.org/wiki/Sensory_deprivation

http://en.wikipedia.org/wiki/Highly_sensitive_person

http://en.wikipedia.org/wiki/Burnout_%28psychology%29