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4. Materials for auditory self-work.

4.1.List of study practical tasks necessary to perform at the practical class.

Materials and methods: neurologic hammer, needle, cotton-wool, weight set, subject (big) glass, Weber’s compasses.

Investigation object: human being.

Task 1. To investigate hands and face skin pain sensitivity

There may be painful sensation in face and head region at oral cavity organs diseases. For example, at the diseases of teeth of superior jaw sensation locus is localized for incisival teeth in a region of plica fronto-nasal (it’s maximal in superciliary arc at 1,5 cm from its middle); for canine teeth (fang) and premolars – in naso-labial region of corresponding side; at injury of the 1st and 2nd molars – in cheek region; the 2nd and 3rd molars – mandibular region. At pathology of teeth of mandibular: for teeth incisivi, canine teeth and 1st premolar - chin region; for the 2nd molar – in sublingual region maximal downwards and backwards from the mandibular angle or at region of acoustic external meatus; at the diseases of the 3rd molar maximal pain is localized in front of muscle sternocleidomastoid.

One can irritate the skin of face or hand by neadle. The irritation mustn’t be too strong or frequent. One should first determine whether the investigated person differentiates prick or touching. For this aim it’s necessary in turn but without regular order to touch to skin with blunt and acute subject. While this procedure the investigated person is proposed to find out the character of influencing (blunt or acute one). The injections must be short-termed, they mustn’t cause acute pain. For clerifying of the boundaries of changed sensitivity the investigation must be performed out off healthy locus and on the contrary.

Task 2. Temperature sensitivity investigation on hand

For stimuli you must use 2 test tubes (with hot – of 40-50°C and cold 25°C or lower water). One should determine first whether the investigated person differentiates warm from cold (healthy people feel the temperature difference in 2°C). Then you must compare the temperature stimuli perception intensivity on different skin locuses of hands, face and to determine the boundaries of increased or lost temperature sensitivity.

Task 3. Muscular-articular sensitivity investigation

At muscular-articular sensitivity investigation one should check up the sense of passive movements, localization sense, skin kynaesthesia, pressure and weight sense. The investigator asks the investigated person close his eyes, the first one moves the fingers of investigated person. The last (investigated person) must find out the localization of extremity. The investigated person must reproduce the localization of other extremity with his closed eyes. If he doesn’t differentiate light movements their altitude must be increased. The investigator muct touch to the investigated person’s very easy without extra (spare) influencing onto the skin receptors.

Skin kynaesthesia must be checked up by shift of plica, the investigated person must determine the direction of shift.

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