Neuroscientists from Harvard University have put a whole new spin on the age-old saying “monkey see, monkey do,” after their brain implants allowed one monkey to control the actions of another monkey. Their findings could someday allow paralyzed individuals to control movement of their own limbs.
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To accomplish the feat, scientists placed electrodes in the brain of a puppet-master rhesus monkey, while a sedated avatar monkey had electrodes wired to its spinal chord. A computer decoded the brain activity of the master and sent signals to the avatar’s spinal cord, whose hand was placed on a joystick controlling a cursor on the master’s screen.
The master monkey controlled the movement of the cursor by moving the avatar’s hand, and was rewarded each time he moved the cursor onto a target. In 98 percent of tests, the master could correctly control the avatar’s arm.
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