A device for examination of motor system of human or animal body, through examination and determination of the ability of muscular system to function and perform, include a unit to insert, rest and secure body parts to be examined, and to repeat examinations of the same body parts in a same fixed position, a power source to put weight on muscle and a unit to stimulate or contract the muscles or nerves, a rest and securing element with a splint rest or with an arm rest table, a thumb mould with thumb bridge and a thumb lever, in which the thumb lever is firmly connected to a vertically arranged main unit axle, which connects to the power source; means for determining the type of contraction, to automatically limit the power via stopping mechanism, as well as stimulants for stimulation of muscles, nerves or the central nervous system, mechanical and electrical/electronic measuring devices including dynamometers, acceleration meters, muscle-length meters, sensors for the recording of electrical potential fluctuations, the skin temperature and acoustic signals and vibrations.