Electromyographic and mechanomyographic parameters of a patient are detected accurately with few artifacts in a medical sensor device (11) for a patient. The medical sensor device (11) includes an electrode (12) for detecting an electric voltage on a body surface of the patient, a holding element (10) with preferably at least one transmission means for transmitting or conducting signals or electric currents, at least one mechanical connection means (14) for the detachable mechanical connection of electrode (12) with holding element (10), and at least one electric connection means (15) for the detachable electric connection of electrode (12) with holding element (10). the holding element (10) comprising at least one sensor for detecting at least one medical parameter of the patient.