Hot Spot Hound: a novel robot-assisted platform for enhancing TMS performance

Area of Science:

• Neuroscience
• Robotics
• Biomedical Engineering

Background:

• Transcranial Magnetic Stimulation (TMS) requires precise coil positioning for effective cerebral cortex stimulation.
• Subject head-coil movement introduces significant error, compromising stimulation accuracy.
• Manual coil placement is prone to inaccuracies and inconsistencies.

Purpose of the Study:

• To introduce the novel Hot Spot Hound robot-assisted experimental platform.
• To enhance TMS stimulation performance through automated coil positioning and movement compensation.
• To improve the accuracy and safety of TMS procedures.

Main Methods:

• Integration of an optoelectronic neuronavigation system for real-time pose data.
• Utilizing a KUKA LWR robotic arm for precise coil manipulation.
• Implementing a control strategy to maintain constant spatial relationship between the coil and the subject's head.
• Adjusting position stiffness for optimal error reduction and subject safety.

Main Results:

• The Hot Spot Hound platform demonstrated superior coil positioning accuracy compared to manual methods.
• The system effectively compensated for involuntary subject movements, maintaining stimulation point stability.
• Errors in coil position and orientation were significantly reduced.
• Safe physical interaction with the subject was assured.

Conclusions:

• Hot Spot Hound offers a robust solution for precise and stable TMS coil placement.
• The robot-assisted platform enhances the reliability and efficacy of TMS treatments.
• This technology has the potential to advance neuroscientific research and clinical applications of TMS.