Wearable, Wireless, Stretchable, High‐Density Surface Electromyography Interface

Surface electromyography (sEMG) provides rich neural information as the human‐machine interfaces. However, it is still challenging to achieve wearable sEMG‐based human‐machine interfaces, owing to the non‐conformal electrode arrays and bulky monitoring systems. Herein, a wearable, wireless, and high‐density sEMG interface incorporating soft multi‐channel electrode arrays and a minimized signal monitoring circuit is presented. The stretchable (≈150%) electrode array fabricated by 3D printing silver paste onto adhesive (0.37 N cm −1 ) silicone‐based substrates demonstrates the capability of eliminating signal artifacts in dynamic hand motions. The electrode array with a customize wireless circuit is further integrated for real‐time recording of eight‐channel sEMG signals on deforming skin. Using this conformal system, various wrist‐hand gesture recognition is achieved through single flexor digitorum superficialis (FDS) muscle detection. The wireless sEMG‐based interface also enables high‐precision signal monitoring under dynamic exercises of the upper and lower limbs, exploring the diverse applications for human‐machine interaction and daily healthcare.