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http://www.nytimes.com/2011/05/17/science/17rib.html?_r=1&ref=health
“If you pick up a twig and start bending it, you’ll hear something snap before you ever notice any real damage to the twig itself,” said Dr. Crenshaw. “We’re doing something similar here.”
Dr. Crenshaw and his colleagues programmed the rib spreader’s onboard computer to stop advancing it within a quarter of a second after sensing one of these pops.
“If you pick up a twig and start bending it, you’ll hear something snap before you ever notice any real damage to the twig itself,” said Dr. Crenshaw. “We’re doing something similar here.”
Dr. Crenshaw and his colleagues programmed the rib spreader’s onboard computer to stop advancing it within a quarter of a second after sensing one of these pops.
