Abstract: What is described here is a process and a device for deep-selective detection of spontaneous activities and general muscle activities in biological tissue. In this process, photons of a coherent and monochromatic electromagnetic radiation of the wavelength ?1 penetrate the tissue in the range between 600 and 1,200 nm and re-emerge from the tissue at differently distanced areas, then being detected with regard to frequency and number or intensity. By means of an evaluation program or algorithm, this information in connection with the respective area as point of emergence of the photons allows conclusions to be drawn about the muscle activity and/or number of active muscles and/or the physical position of the active muscles in the tissue.

Abstract: The invention relates to a detection probe for spectroscopy and/or spectrometry in tissue (4) with the aid of optical fibers (1,2). At least one fiber (2) transmits light into the tissue (4) and other fibers (2) receive backscattered light. According to the invention, deflection devices (mirrors 6, fibers 7, prisms 9,10,11) are provided for the light, whereby the inventive probe is substantially flatter and easier to handle.

Abstract: A device and an evaluation procedure for the depth-selective, non-invasive detection of the blood flow and/or intra- and/or extracorporeally flowing liquids in biological tissue are described whereby photons of a coherent, monochromatic source of light are entered into the tissue through a first area, photons reemerging from the tissue at different distances from this first area are detected with respect to their frequency and number, or intensity, and, from this information, i.e. frequency and/or number, or intensity, and/or reemerging location, conclusions about the relative modification of the flow amount and/or speed and/or location of the blood flow and/or the intra- and/or extracorporeally flowing liquids in the tissue are drawn with the help of an evaluation program or algorithm.