A medical sensor system which includes at least one sensor lead which can be implanted in the body of a human/animal, comprising two end sections, wherein the end sections are designed to be routed through two artificial openings in the surface of the body. The sensor lead includes, between the two end sections, at least one sensor for detecting a biological measured quantity. The sensor system furthermore includes at least one fastening element disposed on the surface of the body, which can be connected to the end sections guided through the body openings for affixing the implanted sensor lead, wherein the at least one fastening element comprises a device for processing sensor signals, and an energy source for supplying the sensor system with electrical energy.
