Measurement and analysis of motor adaptation to dynamic environments

The present paper first introduces the recent activities of IMEKO Technical Committee "TC-18 Measurement of Human Functions". Then we discuss the motor adaptation under dynamical environments during reaching movements. Subjects first learned reaching movements in a position-dependent divergent force field (DF) and velocity-dependent force field (VF), and then in switched force fields SF1 (DFrarrVF) and SF2 (VFrarrDF). It is shown that the adaptation to the switched force fields has been achieved by combining the internal model control and impedance control in a feedforward manner.