Abstract: The present disclosure describes a measurement unit including measurement electronics, a wireless transceiver unit, and a processing. The measurement electronics are configured to measure an EMG signal and a motion signal from a limb of a person. The processing unit is configured to determine a principal component representation of the EMG signal and the motion signal in real time, wherein the principal component representation represents a projection of at least one feature of the EMG signal and at least one feature of the motion signal into at least one uncorrelated feature in a feature space formed by orthogonal basis vectors, and transmit the principal component representation to an external system with the wireless transceiver unit.

Abstract: The present disclosure describes an electrode patch, and a method, a measurement arrangement, and a detection system utilizing the electrode patch for detecting an indicator of Parkinson's disease in a person from a muscle in a limb of the person. The electrode patch comprises two measurement electrodes, wherein a distance between centres of the measurement electrodes is above 2 cm and less than 4 cm, and a reference electrode positioned such that a lateral distance of from a centre of the reference electrode from to an axis passing through the centres of the measurement electrodes is at least he distance between the measurement electrodes.