Involvement of the Rostromedial Prefrontal Cortex in Human-Robot Interaction: fNIRS Evidence From a Robot-Assisted...

Area of Science:

• Neuroscience
• Robotics
• Rehabilitation Medicine

Background:

• Assistive exoskeleton robots are crucial for neurorehabilitation, enhancing motor and sensory functions.
• The brain prioritizes external information processing (IP) during robot-assisted tasks, but underlying neural mechanisms are unclear.
• The rostromedial prefrontal cortex (rmPFC) is hypothesized to manage executive resource allocation for external IP.

Purpose of the Study:

• To investigate cortical activation related to executive resource allocation during robot-assisted motor tasks.
• To explore the role of the rmPFC in prioritizing external information processing during human-robot interaction.

Main Methods:

• Functional near-infrared spectroscopy (fNIRS) was used to measure cortical activity.
• Participants performed an elbow flexion-extension task under three conditions: robotic assistive loading (ROB), resistive loading (RES), and non-loading (NON).
• Statistical analyses included repeated measures ANOVA and general linear model-based methods.

Main Results:

• Hemodynamic responses in the ventral and dorsal rmPFC were significantly higher during ROB compared to NON.
• The ventral rmPFC showed greater hemodynamic responses during ROB compared to RES.
• Increased activation in rmPFC subregions suggests a role in executive resource allocation.

Conclusions:

• The study provides novel insights into the neural basis of executive control during robot-assisted motor tasks.
• Increased rmPFC activation indicates its involvement in prioritizing external information processing during human-robot interactions.