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What researchers are increasingly discovering is that the human brain may contain much more plasticity than they thought. Understanding how it recovers from injury or compensates for damaged tissue may shed light not only on memory disorders, but also on other conditions, such as Parkinson's or Lou Gehrig's disease, Hyman suggests. "That kind of mental flexibility would be an important component to recovery from any kind of damage...
...Democrats will have to decide in the coming weeks whether they are willing to go it alone on health reform or whether they will continue to negotiate with Republicans for a bill that would likely be less expensive and contain far less of a role for government in the health-care system. The chief tool Democrats have for ramming through a bill on their own is something known, incongruously enough, as "reconciliation." It is a parliamentary procedure that protects budget-related measures from a filibuster. (There's yet another possibility: Reid might put the pressure on his own caucus...
Nayernia's in vitro-derived sperm, or IVD sperm, are not exactly like naturally occurring sperm, though they do bear four important similarities to the cells created in the testes. They contain half the number of chromosomes of other human cells (somatic cells contain 46 chromosomes, but egg and sperm cells have only 23, since they combine their genetic payloads during fertilization); they possess a head and a tail; they contain proteins essential for activating the egg during fertilization; and they swim, or move as sperm do in seeking out eggs to fertilize...
...worth noting that researchers could generate IVD sperm only from male embryos; when they tried using stem cells from a female embryo, they were unable to get sperm to mature past the spermatogonial stage. That suggests that genes located on the Y chromosome, which female cells do not contain, may be essential for triggering the maturation of the primitive sperm cell...
...daily to relieve pain from chronic conditions such as arthritis, or they take Tylenol PM regularly to help them sleep. If taken as directed, doctors say these products are safe. At issue is the maximum daily dosage, which people may inadvertently exceed when taking a combination of medications that contain acetaminophen. Most people do not realize that the ingredient is present in so many different popular over-the-counter remedies...