- Sensation is a change in the conscious state that is caused by the abnormal stimulation of nerves reaching the sensory area centers of the brain.
- Sensation means the sensory experience of the stimulus caused by the senses.
(1) External Sensors: Changes in various stimuli in the external environment like light, heat, cold, sound, touch, pressure as well as various chemicals etc. stimulate our various senses so that different sensations are experienced.
(2) Body Sensors: Like the components of the external environment, the composition of the internal organs of the body is responsible for various sensations.
(3) Internal Sensors: Due to the changes in the internal organs of the body, some sensations are experienced such as hunger due to emptying of the stomach, thirst due to absorption in the throat, etc.