Study of the sensitivity

Study of the sensitivity produce with closed eyes studied (to eliminate the visual controls and increased attention). Tactile sensitivity typically explore a light touch to the skin of the patient with a brush, cotton wool, etc.,; pain sensitivity - pin stick (or the special device - dolorimeter); thermal sensitivity - touch to the skin test tubes containing the cold (IDN cool) and hot (or warm) water. Studied should immediately by applying the relevant irritation inform about your feeling. In the study of the localization of surface sensitivity cause light irritation to the skin, and the patient with closed eyes pointing place irritation.
The clinic also used several other studies. 1. Study of the threshold characteristics of pain and sensitivity, with a graduated set of bristles and hair Frey (their thickness and strength produce skin irritation is gradually increasing from the first to the tenth number of the set). The method gives a possibility to get an idea about the hidden reduced sensitivity by reducing the number of correct answers or you feel only if irritation larger hairs or bristles - raising the threshold.
2. The study of sensitive adaptation when prolonged and constant irritation (such as skin prick of a pin or a bristle) over a period of time resulting in pain fades, despite the ongoing irritation. This is the phenomenon of adaptation, and the period of time over which comes fading feeling, called the adaptation time. In pathology can be observed shortening of time of adaptation, a lengthening, instability, and so on
3. The study of surface sensitivity instead of the usual alternate irritation individual incentives, simultaneous dual stimulation, irritation shot, touch, etc.) symmetrical skin on both sides or two areas of the skin on one side. Appears after a short period of time, despite the ongoing irritation, fading feeling in one of the two irritated areas, a phenomenon touch fading - it is noted in the zone of hidden gipestesia.
4. The study muscular-articular sensitivity produce a participant with closed eyes by passive movement of body parts (distal, proximal) in various joints (for example, phalanges, Golino-ankle joint and others), in different directions (up, down, sideways), with different traffic volume. Close to this kind of sensitivity is proprioception skin - recognition direction offset skin, collected in the fold. Violation of muscle and joints sensitivity usually leads to disturbances of motor skills, especially the subtle movements, as well as standing and walking.
5. The sense of pressure detected by the pressure on the investigated area is best using banestasjoner (see Estationery). Feeling the weight explore using a set of weights of different weights, placed on elongated limbs. Vibration sensitivity - paresthesia - a kind of feeling vibration sounding tuning fork (usually enjoy And-256), the leg of which is put on the joints or the tabs bones. This kind of sensitivity requires complex of participation of proprio - and exteroreceptors. For research feelings of discrimination, i.e. the ability separately to feel two irritation (tactile, pain), use so-called compass Weber, the legs of which is shifted by a certain distance. Simultaneous touch or shot two legs of a compass is perceived in Norm separately, with the necessary minimum distance between the two stimuli in different parts of the body is different.
6. Even more difficult is the sensitivity with which recognized the items in two or three dimensions; here the dominant element of knowledge and gnosis. Two-dimensional spatial sensitivity examined by the mark on the skin figures, numbers, which investigated must recognize with your eyes closed. Recognition of objects in three dimensions is the most complicated kind of sensitivity. Detected object, its shape, size, length, texture, the contours of the surface (smooth, rough), and so on, the Combination of all these sensations of certain qualities of the object defines a comprehensive vision, recognition - stereognosis. For his research patient with closed eyes put into the hand of the various objects (coins, key points and so on) and serves to identify them. Some are even so-called common sense, common visceral sensations of his body - kinesthesia.