The robotic 'hands' of NeuroArm are rock-steady, and can move in much smaller increments than a human being's hands.
Earlier this month, NeuroArm was used to remove a brain tumor from the patient Paige Nickason — a first.
The human hand can steady itself and move in increments of one or two millimeters. NeuroArm can move in increments of just fifty microns. A micron is one millionth of a meter. Also, NeuroArm's robotic 'hands' can operate in the brain in a way that is less invasive and more delicate than a surgeon's hands.
NeuroArm is not an autonomous robot; it operates under the direction of physicians using remote controls and an imaging screen for close work.
I think science fiction writer Raymond Z. Gallun called this one in his 1939 story Masson's Secret:
Robert Heinlein came close on this one; he thought about "ultramicrominiature waldoes" that could be used to perform microsurgery just a few years later.
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(This Science Fiction in the News story used with permission of Technovelgy.com)