Task-dependent coarticulation of movement sequences.

ABSTRACT: Combining individual actions into sequences is a hallmark of everyday activities. Classical theories propose that the motor system forms a single specification of the sequence as a whole, leading to the coarticulation of the different elements. In contrast, recent neural recordings challenge this idea and suggest independent execution of each element specified separately. Here, we show that separate or coarticulated sequences can result from the same task-dependent controller, without implying different representations in the brain. Simulations show that planning for multiple reaches simultaneously allows separate or coarticulated sequences depending on instructions about intermediate goals. Human experiments in a two-reach sequence task validated this model. Furthermore, in co-articulated

SUBMITTER: Kalidindi HT 

PROVIDER: S-EPMC11434614 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature