Over in a flash

日期:2019-03-07 05:12:10 作者:东乡绺俚 阅读:

Researchers studying brain activity should focus on the immediate increase in oxygen consumption, say scientists at the Weizmann Institute in Israel. Most MRI scans don’t capture this initial burst. In Science (vol 286, p 1555), the researchers report using a phosphorescent marker called Oxyphor R2, which glows when oxygen is consumed, to see where in a cat’s brain an image was perceived. The technique showed that the brain’s initial response to a stimulus is a highly localised increase in oxygen use. MRI scans tend to capture much less localised events that happen many milliseconds later. This could lead to serious errors in mapping brain function,