Prior coordination solutions shape motor learning and transfer in redundant tasks.

Area of Science:

• Motor control
• Motor learning
• Human movement science

Background:

• Motor learning is influenced by pre-existing coordination strategies, not a blank slate.
• The impact of these prior solutions on learning redundant tasks, which have multiple solutions, is not well understood.

Purpose of the Study:

• To investigate how prior coordination solutions affect motor learning in a redundant task.
• To examine the influence of practiced symmetric versus asymmetric solutions on subsequent learning.

Main Methods:

• Human participants learned a bimanual redundant virtual shuffleboard task.
• Participants practiced either symmetric or asymmetric solutions on day one.
• On day two, all participants transferred to a common asymmetric criterion task.

Main Results:

• Practiced solution symmetry influenced motor variability and null space exploration during learning.
• Participants who initially practiced symmetric solutions showed greater null space exploration when transferring to an asymmetric task.
• Participants tended to revert to symmetric solutions when task constraints were removed, irrespective of initial practice.

Conclusions:

• The stability of previously learned coordination solutions plays a crucial role in shaping motor learning in redundant tasks.
• Prior motor strategies can bias subsequent learning and adaptation.
• Understanding these influences is key for optimizing motor skill acquisition.