Vestibulometry

Vestibulometry - research methods vestibular apparatus that allows to judge about its functions. The results of vestibulometry evaluated by the nature of nystagmus (see) and vegetative reactions.
1. Caloric test is slow infusion in the ear canal warm (temperature 40 degrees or more often cold (temperature 18 degrees) of water. In the first case, the nystagmus is directed towards the studied ear, the second - in reverse. No nystagmus said the loss of excitability of the maze. When perforation of the eardrum to produce a caloric test is not recommended.
2. Rotational test is made on a rotating chair (see Barany chair). The head of the investigated keep straight, eyes closed. Spend 10 uniform rotations first right, then left. Speed of rotation - 1 turnover within 2 seconds. After stopping the rotation monitor the occurrence of nystagmus studied during this sitting right with open eyes and, without turning his head, looking away on his finger exploring, located 25 cm at eye level in the side opposite to the former rotation. OK nystagmus lasts about 30 seconds. Lengthening the time nystagmus indicates the increase, shortening - at the partial or total suppression of excitability of the maze.
3. Pressor test (pistolry symptom) is thickening (or vacuum) air into the ear canal by a cylinder of Politzer or pressing trestle. The resulting nystagmus indicates the presence of a fistula (fistula) in semicircular canal: thickening of the air in the ear canal nystagmus facing investigated ear, when the depression goes in the opposite direction.
4. Otolith reaction Wojciecha (PR) is made on a rotating chair. Studied tilts his head down 90 degrees, and closes his eyes. Produce 5 spins for 10 sec. Then 5-second pause, then studied offer to raise my head and open my eyes. Pronounced deviation of the body and autonomic symptoms (nausea, cold sweat , and so on) speak about the increase of the vestibular-vegetative sensitivity. Otolith reaction is made by professional selection at work where it is necessary to keep balance in difficult conditions.
5. Finger-nasal sample is analyzed with closed eyes must touch with the index finger to the tip of the nose.
6. Index sample - both hands sitting of the patient lie on his knees, fingers, except the index, bent. Raising her hands alternately, sick with closed eyes must touch your index finger exploring. Hand movement can be made in the horizontal and vertical directions. OK both tests are performed accurately. The irritation of the maze observed bilateral pomahivaya, more expressed in the direction of the affected labyrinth. In addition to these samples, now is the study of vestibular apparatus method measured accelerations on the special equipment (the so-called coulometry) and the method of incremental, or Coriolis, accelerations.