title: A balanced motor primitive framework can simultaneously explain motor learning in unimanual and bimanual movements.
abstract: Certain theoretical frameworks have successfully explained motor learning in either unimanual or bimanual movements. However, no single theoretical framework can comprehensively explain motor learning in both types of movement because the relationship between these two types of movement remains unclear. Although our recent model of a balanced motor primitive framework attempted to simultaneously explain motor learning in unimanual and bimanual movements, this model focused only on a limited subset of bimanual movements and therefore did not elucidate the relationships between unimanual movements and various bimanual movements. Here, we extend the balanced motor primitive framework to simultaneously explain motor learning in unimanual and various bimanual movements as well as the transfer of learning effects between unimanual and various bimanual movements; these phenomena can be simultaneously explained if the mean activity of each primitive for various unimanual movements is balanced with the corresponding mean activity for various bimanual movements. Using this balanced condition, we can reproduce the results of prior behavioral and neurophysiological experiments. Furthermore, we demonstrate that the balanced condition can be implemented in a simple neural network model.
authors.affiliation: Tokyo University of Agriculture and Technology, Department of Engineering, 2-24-16, Nakacho, Koganei, Tokyo 184-8588, Japan. Electronic address: takiyama1106@yahoo.co.jp.
authors.forename: Ken
authors.initials: K
authors.lastname: Takiyama
authors.affiliation: Brain Science Institute, Tamagawa University, 6-1-1, Tamagawa-gakuen, Machida, Tokyo 194-8610, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Sakai
mesh_terms: D000328:Adult; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D007858:Learning / Q000502:physiology*; D008297:Male; D009048:Motor Skills / Q000502:physiology*; D009068:Movement / Q000502:physiology*; D016571:Neural Networks, Computer; D011597:Psychomotor Performance / Q000502:physiology
keywords: Bimanual movement; Motor learning; Motor primitive; Neural network; Unimanual movement