Concurrent response and action effect representations across the somatomotor cortices during novel task preparation

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Motor Control

Background:

• Instructions enable rapid execution of novel and complex tasks.
• This ability is associated with preparatory neural signals anticipating task demands.
• Understanding the neural basis of instruction processing is crucial for cognitive science.

Purpose of the Study:

• To investigate whether instructions pre-activate task-relevant motor and perceptual neural states.
• To determine if these neural representations anticipate overt sensorimotor processing.
• To explore the role of internal simulation in novel task preparation.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to collect brain data.
• Participants encoded and implemented novel stimulus-response associations.
• Canonical template tracking analyzed neural representations of motor responses, perceptual consequences, and stimulus categories.

Main Results:

• Response-related neural templates were pre-activated in action control regions, including primary motor and somatosensory cortices.
• These representations encompassed instructed responses and their somatosensory consequences.
• Representational strength of irrelevant stimulus templates decreased significantly, suggesting focused preparation.

Conclusions:

• Instruction processing engages sensorimotor cortices to anticipate motor and kinesthetic representations of action plans.
• Motor imagery likely plays a role in preparing for novel tasks.
• The somatomotor system collaborates with frontoparietal regions in anticipatory task control.