Fig. 5From: First-in-human demonstration of floating EMG sensors and stimulators wirelessly powered and operated by volume conductionUltrasounds image obtained from participant 2 immediately after the needle was inserted in the biceps brachii. The needle was injected from the top right corner (not shown in the image), passed through subcutaneous fat and the muscle fascia, and ended up in the target muscle. The tip of the needle is seen at the left of the image at a depth of approximately 1 cmBack to article page