Response-repetition effects depend on motor set: evidence for anatomical coding in response selection

Area of Science:

• Cognitive Neuroscience
• Motor Control
• Human Factors

Background:

• Response selection is crucial for successful motor performance.
• Current theories often overlook effector anatomy, focusing on spatial coding.
• The role of neuro-anatomical distinctions in response selection remains underexplored.

Purpose of the Study:

• To investigate the influence of effector anatomy on response selection.
• To test the hypothesis that anatomical hand information plays a role in motor response selection.
• To examine response-repetition effects using different motor sets (one hand vs. two hands).

Main Methods:

• Utilized a response-cuing paradigm to study motor response selection.
• Employed two distinct motor sets: fingers on one hand and fingers on two hands.
• Analyzed reaction time data to assess response-repetition benefits.

Main Results:

• A significant response-repetition benefit was observed.
• This benefit was more pronounced for the one-hand motor set compared to the two-hands set.
• Repetition benefits for the one-hand set were independent of prior trial factors, unlike the two-hands set.

Conclusions:

• The neuro-anatomical distinction between hands is important in response selection.
• Findings support theories proposing multiple coding schemes in motor control.
• Motor response selection involves both spatial and anatomical effector information.