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 (DF→VF) and SF2 (VF→DF). 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.