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tactile sensation received by the skin, enabling the organism to detect objects or substances in contact with the body. End organs (nerve endings) in the skin convey the impression to the brain. Touch sensitivity varies in different parts of the body, depending on the number of end organs present in any one area. The tip of the tongue, lips, and fingertips are three of the most sensitive areas, the back and parts of the limbs the least so. The sense of touch is very closely related to the other four sensations received by the skin: pain, pressure, heat, and cold. There is a specific kind of sensory receptor for each of the five so-called cutaneous senses. For example, light-touch receptors convey only the sensation that an object is in contact with the body, while pressure receptors convey the force, or degree, of contact. The blind learn to read by the Braille system by making use of the sensitivity to touch of the fingertips.



the ability of animals and man to sense environmental factors by means of receptors in the skin; in the locomotor system, which includes the muscles, tendons, and joints; and in some mucous membranes, such as those on the lips and tongue.

The tactile process is based on stimulation of various types of receptors: mechanoreceptors that perceive contact, pressure, and tension; thermoreceptors that perceive heat and cold; and pain receptors. This information then reaches and is transformed by the central nervous system, including the cerebral cortex. The sensation of touch can be quite varied because it results from a complex perception of different properties of a stimulus acting on the skin and subcutaneous tissues. The perception of environmental objects by touch permits evaluations to be made concerning their shape, size, surface properties, consistency, temperature, dryness or wetness, and position and movement in space. At the cellular level, touch breaks down into several different receptor processes: there is no single morphological type of tactile cell.

The sense of touch greatly broadens the organism’s impressions of its surroundings and plays an important role in its vital activity. In many lower animals the sense of touch, together with chemical sensitivity, is the principal means of perceiving the environment. To some extent, touch substitutes for the sensory organs of sight and hearing when they are injured. Touch permits blind persons to read, perform a variety of delicate manual operations, and orient themselves in space. In persons who are both blind and deaf, touch is the main source of information about the outside world and can be developed to an exceptionally high degree. The term “touch” is becoming less common because of increasing knowledge of the receptor processes’ cellular mechanisms; the mechanisms of mechanoreception, thermoreception, and pain are usually considered independently.


Granit, R. Elektrofiziologicheskoe issledovanie retseptsii. Moscow, 1957. (Translated from English.)
Esakov, A. I., and T. M. Dmitrieva. Neirofiziologicheskie osnovy taktil’nogo vospriiatiia. Moscow, 1971.
Fiziologiia sensornykh sistem, part 2. (Ruko-vodstvopo fiziologii.) Leningrad, 1972.
Milner, P. Fiziologicheskaia psikhologiia. Moscow, 1973. Chapters 8, 10. (Translated from English.)




a performer’s particular manner of producing sound on the piano through various ways of pressing and striking the keys. Each pianist has his own individual touch, which depends on his physiology and artistic intent. J. Field and S. Thalberg produced a soft, “velvety” tone; S. V. Rachmaninoff and A. G. Rubinstein played with a deep, rich tone; and K. N. Igumnov elicited a tender, lyric sound.


The array of sensations arising from pressure sensitivity of the skin.


1. Rugby Soccer the area outside the touchlines, beyond which the ball is out of play (esp in the phrase in touch)
2. Archaic
a. an official stamp on metal indicating standard purity
b. the die stamp used to apply this mark
3. a scoring hit in competitive fencing
4. an estimate of the amount of gold in an alloy as obtained by use of a touchstone
5. the technique of fingering a keyboard instrument
6. the quality of the action of a keyboard instrument with regard to the relative ease with which the keys may be depressed
7. Bell-ringing any series of changes where the permutations are fewer in number than for a peal


(1) A generic reference to touchscreen interfaces, which means using the finger to tap icons and move objects on a touch-sensitive screen. See touchscreen.

(2) See iPod touch.
References in periodicals archive ?
There is little mention in Touchable Sound of any such history, or any broader context within which to frame these records.
The exhibition's dramatic displays--towering walk-through dioramas, interactive technology, touchable displays, and live animals--enable visitors to understand, viscerally, the exhibition's threefold message: that water is essential to all life; that water plays a key role in shaping the landscape and governing weather; and that all water on Earth is linked, finite, and unevenly distributed around the globe.
Pamela Ricci Justino, marketing director of the Brazil-based Galleria Abaporu and organiser of the exhibition which ended Thursday, told Gulf News: "We are keen to introduce a touchable artistic piece of Brazil to the UAE community, and strengthen the cultural ties between Brazil and the UAE.
On 7 October the personal care giant will boldly unveil what it described as its "first touchable billboard" at London's perennially classy Westfield Shopping Centre.
Touchable objects are very important for them because they have huge difficulties to visualize the third spatial dimension.
HAMADI Shea Hair Mask is an indulgent weekly treatment for producing sensuous and touchable hair.
They didn't take an existing mobile OS and [rework it to] make it touchable," he says.
The Presidential suite at the Shangri-la Qaryat Al Beri, Abu Dhabi was described as, "An up to the moment spin on traditional Arab design elements complete with touchable fabrics in deep, saturated color creates a sense of welcoming formality".
A AS well as the wet and windy weather our central heating systems can also wreak havoc on your hair so it's important to keep hair soft, sexy and touchable.
We have a really touchable subject in the movie, reinvention of oneself, and other elements that are almost like Greek tragedy.
It absorbs well leaving your skin soft, smooth and wonderfully touchable.
When shut down, it safely and instantly returns to touchable ambient temperature.