Sensation
Sensation
Sensation (/sɛnˈseɪʃən/; from Latin sensatio, "perception, feeling, understanding") is the body's detection of external or internal stimulation (e.g., touch, pain, heat, cold), which is then relayed to the brain for processing and perception.
Etymology
The term "sensation" comes from the Latin sensatio, which means "perception" or "feeling". It is derived from the verb sentire, which means "to feel".
Definition
In medicine and psychology, sensation is the first stage in the biochemical and neurologic events, beginning with the impingement of a stimulus upon the receptor cells of a sensory organ, which then leads to perception, the mental state that is reflected in statements like "I see a uniformly blue wall."
Types of Sensation
There are several types of sensations, including:
- Tactile sensation: This is the sense of touch, which is a complex sensation with many sub-modalities such as pressure, vibration, heat, cold, and pain.
- Thermal sensation: This is the sense of heat and cold, which is detected by the skin.
- Pain sensation: This is the sense of discomfort or distress, which can be caused by injury, illness, or emotional distress.
- Auditory sensation: This is the sense of hearing, which is detected by the ears.
- Visual sensation: This is the sense of sight, which is detected by the eyes.
- Olfactory sensation: This is the sense of smell, which is detected by the nose.
- Gustatory sensation: This is the sense of taste, which is detected by the tongue.
Related Terms
- Perception: The process by which sensations are interpreted and organized in the brain to form an internal representation of the world.
- Stimulus: Any event or situation that evokes a response.
- Receptor: A cell or group of cells that receive stimuli.
- Neurology: The branch of medicine dealing with disorders of the nervous system.
External links
- Medical encyclopedia article on Sensation
- Wikipedia's article - Sensation
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