‘Neural dust’ can listen to body’s electrical signals
Tiny ultrasonic devices show ability to detect nerve activity in rats
![tiny crystal on a fingertip](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/08/080516_ls_neural-dust_free.jpg?fit=860%2C460&ssl=1)
SPECK WORK A crystal that vibrates in response to ultrasound allowed this tiny sensor (shown on a fingertip) to pick up signals from rat nerves and muscles.
Ryan Neely/UC Berkeley