The document proposes using ultrasound to power implanted devices that can stimulate nerves and transmit data via modulated nerve signals. This would allow sending data from an array of piezoelectric nanowire devices on the vagus nerve in the neck to a drug delivery system implanted in the brain. Ultrasound would convert to electrical pulses to stimulate the vagus nerve and encode data in the nerve signals up to 200 bits per second, allowing targeted drug delivery in the brain through neural communications.