Abstract: A sensor system is used for measuring, transmitting, processing and displaying a brain parameter. The sensor system has an implantable brain parameter sensor with a wireless transmission unit for measuring the brain parameter. A receiving unit with an antenna is in wireless signal connection with the latter. A data read module is in signal connection with the antenna and a data processing and display device is in turn in signal connection with the data read module. The sensor system also has a head cap or a head hood, on which the receiving unit is fixed to predetermine a relative position relative to the transmitting unit. A sensor system is the result, the use of which remains comfortable for the patient even over a relatively long measuring period. A method for transmission of measurement data measured with the brain parameter sensor to the external data read module is also provided.