Estationery (from the Greek. aisthesis - feeling and metreo - measure, determine) - devices for definition of sensitivity.
To study the sense of touch (tactile sensitivity), the most common instrument is astheimer of Sieveking or compasses Weber. Astheimer of Sieveking consists of longitudinal metal plates and two legs (Fig. 1). On the album, there is a scale with a deposited divisions, which define the distance between both legs. A study produced by touching the feet, separated by a certain distance, to this or that area of skin. You need to carefully ensure that both feet touched simultaneously. Avoid heavy pressure on the skin, so as not to cause pain irritation. If the study felt first two touches, by re-applying the legs with a gradually decreasing the distance between them reach such that touch the feet cease to be treated separately and are felt as one. If the touch both of his legs was initially perceived as a single, then go in reverse order, gradually spreading legs until you reach a limit at which a single feeling goes into separate. The smallest distance, thus obtained, celebrated the appropriate number on the scale, and will indicator of tactile sensitivity in the survey area of the skin. Then compare the obtained data compiled by Weber for different locations of the body surface and the mucous membranes of the table, on what basis are judged on the absence or presence of deviations from the norm.
For the study of tactile sensitivity Macedonski proposed the so-called Tanzimat. This instrument is made of solid rubber tetrahedral bar length of 17 cm and thickness of 1,5 sm, split down the middle into two halves by a small groove (Fig. 2). Each of the four surfaces of the bar in each half are numbered; a total of eight rooms. Surface 1 polished perfectly smooth surface at number 2 appears to be rough because it is covered with very fine thread. The rest of the surface of the bar is covered deeper on-
cuts, resulting in surface roughness is becoming deeper, to the surface at number 8, which is covered with large tetrahedral pyramids. At downturn of tactile sensitivity roughness starts to vary with the number 2 as the norm, and with higher numbers, and the higher died that surface, which for the first time starts to vary as rough, the stronger the disorder tactile sensitivity.

Fig. 1. Astheimer Of Sieveking.
Fig. 2. Tanzimat Of Mascotcapsule.