Non-invasive ANC Opens New Access to Spinal Circuits: A Method for Reconstructing Gait Without Involving the Brain

This podcast episode primarily focuses on a breakthrough development by the Tokyo Metropolitan Institute of Medical Science concerning a non-invasive Artificial Neural Connection (ANC) system designed to restore movement in individuals with spinal cord injuries (SCI). This new non-invasive ANC bypasses the severed connection between the brain and the spinal cord's walking rhythm generator (CPG) by using muscle activity from the hand (EMG) as a "proxy signal" for the intention to walk. By coupling this non-invasive hand signal with Transcranial/Trans-spinal Magnetic Stimulation (TMS), researchers demonstrated that they could activate the CPG to generate stepping movements without complex learning, a significant improvement over previous invasive surgical methods. The source also notes that this non-invasive ANC framework is a foundational technology that could potentially be applied to control other autonomous spinal cord modules, such as those governing bladder control and respiration. A brief secondary report mentions a different development from a Hong Kong team regarding a minimally invasive technique to deploy wide-area electrode sheets onto the brain's surface for brain-computer interfaces.