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Dates: during 2000-2009
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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...

Author: /time Magazine | Title: Can Language Skills Ward Off Alzheimer's? A Nuns' Study | 7/9/2009 | See Source »

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...

Author: /time Magazine | Title: Scientists Create Human Sperm from Stem Cells | 7/8/2009 | See Source »

...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...

Author: /time Magazine | Title: Scientists Create Human Sperm from Stem Cells | 7/8/2009 | See Source »

Should I switch from Tylenol to aspirin or ibuprofen? Not necessarily. If you are not taking any other prescription pain medications that contain acetaminophen and you take Tylenol as directed, you should not be at risk of damaging your liver. Aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs) are effective pain relievers, but when taken at high doses and for prolonged periods - especially for the treatment of chronic pain in older adults - they carry a risk of stomach ulcers and gastrointestinal bleeding. NSAIDs may also raise blood pressure and affect kidney function. If you are concerned about your acetaminophen...

Author: /time Magazine | Title: The FDA and Painkillers: What's Safe Now? | 7/3/2009 | See Source »

...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...

Author: /time Magazine | Title: The FDA and Painkillers: What's Safe Now? | 7/3/2009 | See Source »

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