書誌： Psychophysiology , 2014
Xu, L., Sommer, W., & Masaki, H. (2014). The structure of motor programming: Evidence from reaction times and lateralized readiness potentials. Psychophysiology, doi:10.1111/psyp.12296 (in press)
Abstract There is a widely accepted notion that movement elements are assembled prior to movement execution in a central motor programming stage. However, it is not clear how this stage is structured—whether it is a unitary stage allowing different motor parameters to cross talk or whether there are several independent processes dealing with each motor parameter.We addressed this question by orthogonally manipulating two movement-related factors: response sequence complexity and movement duration. Both factors yielded main effects on reaction time but no interaction. Additive effects of both factors on the onsets of response- but not stimulus-synchronized lateralized readiness potentials suggest separable motoric loci of sequence complexity and duration. These findings are at variance with the notion of a unitary movement programming stage.
Descriptors: Movement preparation, Mental chronometry, Lateralized readiness potential, Finger tapping, Kinematic parameter