Apparatus for finding a functional tissue area in a tissue region

A method of finding a functional tissue area in a tissue region, the method comprising the steps of:

• providing a camera exclusively having a green channel and/or a blue channel;
• illuminating the tissue region with a measurement illuminating device;
• at least intermittently stimulating the tissue region to cause a change of at least one optical property of the light reflected by the tissue region;
• capturing the change of the at least one optical property by an evaluation unit only via a signal of the green channel and/or blue channel of the camera;
• and,
• displaying an output signal of the evaluation unit on a display unit.

A surgical microscope comprising:

• an apparatus for finding a functional tissue area in a tissue region, the apparatus including:
• a measurement illuminating device configured to emit a measurement illumination on to the tissue region;
• a camera for capturing light reflected from the tissue region;
• said camera being configured to have at least one of a green channel and a blue channel wherein there is a change in at least one optical property of the light reflected by the tissue region during stimulation of the tissue region undertaken at least intermittently;
• said camera being further configured to emit a camera signal exclusively of at least one of said green channel and said blue channel;
• an evaluation unit for detecting the change in the at least one optical property only via said camera signal and supplying an output signal;
• and,
• a display unit for displaying said output signal of said evaluation unit for the functional tissue area of the tissue region.