Tactile Sensation


Also found in: Dictionary, Thesaurus, Medical.

Tactile Sensation

 

the sensation produced through the action of mechanical stimuli on the surface of the skin. Tactile sensation, a form of the sense of touch, varies according to the type of stimulus: touch, pressure, or vibration.

Tactile stimuli are perceived by free nerve endings and by nerve plexuses around the hair follicles, as well as by Pacini’s, Meissner’s, and Merkel’s corpuscles. Several Merkel’s or Meissner’s corpuscles may be innervated by the same nerve fiber, constituting a unique tactile formation. Such encapsulated receptors as Pacini’s and Meissner’s corpuscles determine the threshold of tactile sensation; these receptors become stimulated by touch and vibration, and adapt rapidly. The sensation of pressure is produced by the stimulation of such slowly adapting receptors as free nerve endings.

In comparison with other skin sensations, tactile sensation decreases rapidly with prolonged stimulation, since, on the whole, the processes of adaptation in the tactile receptors are very rapid. The most highly differentiated tactile sensations are produced by stimulating the lips, the tip of the tongue, and the tips of the fingers, areas richly supplied with a variety of mechanical receptors. The cortical part of the tactile analyzer is represented in the postcentral and precentral gyri.

REFERENCES

Il’inskii, O. B. “Fiziologiia kozhnoi chuvstvitel’nosti.” In Fiziologiia sensornykh sistem, part 2. (Rukovodstvopo fiziologii.) Leningrad, 1972.
Esakov, A. I., and T. M. Dmitrieva. Neirofiziologicheskie osnovy taktil’nogo vospriiatiia. Moscow, 1971.

O. B. IL’INSKII

References in periodicals archive ?
In the present study, normal tactile sensation in the skin lesions (defined by the perception of a 0.05 g monofilament (7,8)) was recorded for 18.3% of leprosy skin lesions and for 96.2% of skin lesions of diverse aetiologies.
A clear tactile sensation, rather pleasant, yet one I could not recall having experienced before.
The goatskin leather palms offer tear and abrasion strength, and the patented cut-ring combines with an ergonomic fit to provide the tactile sensation needed to perform with surgical precision.
"That's why we have sheets of up to 250 thread count, to provide a special tactile sensation," says Francisco Azpiri, business director of Zemartex, the textile maker specialized in bedding.
"I just like the tactile sensation of cutting rubber stamps and then having an instant image," she said.
As the magnitude of expected pain increased, brain regions associated with learning, memory, emotion, and tactile sensation became more active.
They also plan to recreate tactile sensation. In other words, viewers will be able to reach out and touch what they are seeing.
Technology that enables surgeons to feel tactile sensation while operating a telerobotic system has already been created and is awaiting approval by the Food & Drug Administration.
Tactile sensation. Postoperatively, tactile sensation was evaluated 1 week postoperatively and again at a follow-up of at least 1 year.
This study systematically investigated the effects of various tissue physical properties contributing to human tactile sensation of facial tissue.
They alter the individual's physical perceptions and emotional responses, causing outbreaks of temper, alterations in sight and tactile sensation, nostalgia, despair, even ecstasy.