ApplySci – Deep Tech Health + Neurotech

Brain stimulation and touch sensitivity in prosthetic limbs

http://www.pnas.org/content/early/2013/10/08/1221113110.abstract?sid=35f0c072-fa67-4ec8-9e83-17a292a83982

University of Chicago scientists have completed a study on stimulating a prosthetic limb wearer’s brain with electrical signals to replicate feelings of touch.

The researchers used monkeys with electrodes connected to touch-associated areas of the brain. They completed touch exercises with their normal hand and an unstimulated brain. The same exercises were conducted with a prosthetic hand, which was equipped with pressure sensors to register instances of touch. Pressure registered by the hand was converted into electrical signals, which the electrodes delivered to the monkeys’ brains. The monkeys responded the same in both situations. This includes when the monkeys first touched or released an object, sensing pressure and identifying where on their finger they touched an object.

This has not yet been studied in humans.

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