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produced starting a week after birth, only one mouse of 17 was affected. Two weeks out, none of nine mice were. The results suggest that the neural wiring is set early in life. “Whatever happens around birth is what takes, cheap real jordans ,” says Barnea. With the discovery that olfaction wiring can’t be altered after about a week or so of a mouse’s life, smell joins other senses, including vision and hearing, that have critical windows during development. The second study took the reverse approach: Instead of allowing the wiring to develop normally and then trying to disrupt it, cheap jordans free shipping , Ron Yu of the Stowers Institute for Medical Research in Kansas City, cheap jordans for sale , Mo., and colleagues scrambled the wiring first and then determined if it could recover. A mouse, the researchers found, cheap wholesale jordans , could regain normal wiring if a disruption was lifted around the first week of life. But after about a week, http://cheapjordansstock.com , axons from odor-sensing neurons were less able to reroute to the correct destination. This scrambling left the mice with “interesting changes in their sense of smell, cheap air jordans ,” Yu says, an effect the researchers are still working to understand. The results hint that as older neurons are replaced by new growth, molecular bread crumbs left behind guide newborn neurons to their correct destinations. “There is some memory in the system,” says Barnea. And this trail of bread crumbs is modifiable, cheap jordans online , the studies show, but only for a brief window of time early in life. Although no one knows for sure, cheap Authentic jordans , Yu says that this memory might be a signal provided by older cells. “The old cells are somehow providing a track http://mission-bbq.com/search/node/ http://www.midwestartfairs.com/node/add/article http://al-inshad.com/v...k&p=805991#post805991 |