An apparatus for locating a function-bearing area of tissue in a tissue region

The invention relates to a device for locating a function-bearing area of ​​tissue in a tissue region, comprising: - a measurement illumination device which is capable of delivering to the tissue area a measuring illumination, - a camera with which can be detect reflected light from the tissue region, wherein the camera comprises a green channel and / or a blue channel, which takes place at a least partly made stimulation of the tissue region, a change in at least one optical property of the light reflected from the tissue region light . - an evaluation unit which detects the change in the at least one optical property by a signal of the green channel and / or blue channel of the camera, - and a display unit to which an output signal of the evaluation unit can display the bearing function for the area of ​​tissue in the tissue region.