No great shakes

 作者:暨禳     |      日期:2019-03-07 03:12:04
By Ian Sample A STEADY hand is vital for surgeons performing intricate operations on fragile tissues. To minimise tremors, many microsurgeons steer clear of alcohol the night before and avoid coffee on the day of surgery. Some even use beta-blockers to steady themselves. But scientists in Pittsburgh think they have a better solution. Hand tremors are normal and most of us don’t notice them. But they can hamper surgeons operating on tiny, delicate tissues, such as blood vessels on the retina. “Just sometimes you find yourself with a bit of a tremor and if you start focusing on it,