Various aspects of this disclosure relate to a layered polymer substrate with electrodes and conductive ink embedded in the substrate. In some embodiments, a prosthetic liner may be bonded onto the polymer substrate. The substrate may include an interconnect coupled to the electrodes via the conductive ink. The system may include a controller (e.g., an electrode controller) in communication with the electrodes via the conductive ink. The electrodes may be activated such that they may stimulate nerve fibers in a user's residual limb.

Various aspects of this disclosure relate to a layered polymer substrate with electrodes and conductive ink embedded in the substrate. In some embodiments, a prosthetic liner may be bonded onto the polymer substrate. The substrate may include an interconnect coupled to the electrodes via the conductive ink. The system may include a controller (e.g., an electrode controller) in communication with the electrodes via the conductive ink. The electrodes may be activated such that they may stimulate nerve fibers in a user's residual limb.

Multi-Task Hand Support Device with Biological Signal Acquisition for Operation with or without Bionic Limbs, Prosthetics and Osseointegration Limbs Implants, including Exoskeletons Wearables A hand support device for an input apparatus, such as typing apparatus like keyboard and touch screen panel, any smart electronic device and/or built-in system thereof, is configured for input apparatus like keyboard, headset, laptop or other communication computer input apparatus, or gaming device, including any smart glasses/goggle VR, AR, MR, XR (AI) program display medium headset for the purpose of the user supporting his or her uppers extremities, in particular hands and wrist during repetitive task and or for prolong cervical spine, thoracic spine, and lumbar spine muscular posture tension, in a wrist support typing posture for multitasking, including upper extremities neuroplasticity injuries, through imagined, performed or partially performed EMG, EEG and or EcoG signal acquisition systems.