Word: oxygenation
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...activated areas of the brain receive more blood and more oxygen, the optical properties [of the brain tissue] change," says Luu. "This allows us to infer the pattern of activity beneath." As it turned out, they inferred very well. Blood flow was not a perfect predictor, but fully 80% of the time, the pattern on the brain monitor did suggest the preferences the subjects had indicated earlier...
...playing sports with concussion symptoms so risky? During a concussion, arteries constrict, slowing blood flow to the brain. At the same time, calcium floods the energy-producing portions of brain cells. That calcium plays a mean defense, blocking oxygen- and glucose-rich blood from replenishing neurons' energy supply. Brain cells get sluggish, and a concussed athlete who can't focus or suffers from slower reaction times is left more susceptible to a slew of other injuries, including another concussion. A second blow to the head could lead to more arterial constriction and more calcium infusions. "Concussion produces an energy crisis...
...With corporations cut off from the oxygen of lending, they are slowing dying because they cannot improve their balance sheets in what would be the normal course of business...
...just the Americans. On Sunday NATO Secretary-General Jaap de Hoop Scheffer wrote in the Washington Post that "the basic problem in Afghanistan is not too much Taliban; it's too little good governance. Afghans need a government that deserves their loyalty and trust; when they have it, the oxygen will be sucked away from the insurgency...
...their ordeals. Last year, recalls medical student Juan Carlos Saavedra, 24, a group of gunmen held up an ambulance, smacked around the medics and shot their patient dead on his stretcher--finishing off a victim who had survived an earlier hit. "One bullet was shot right next to the oxygen tank. If it had been a bit closer, the whole ambulance would have exploded," he says, miming the shooting with his fingers. Masked gunmen have also stormed into city hospitals to send the wounded on their way. A wall back at the base displays letters from several private clinics ordering...