Word: age
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...This is higher-order learning, and it takes multiple trials to learn," explains Sheryl Smith, a professor of physiology and pharmacology at Downstate. Prepubescent mice mastered the task quickly. Postpubescent mice also did quite well. But mice in the throes of puberty, which occurs at age 5 weeks, couldn't seem to get it through their furry little heads...
...unusual GABA receptor that helps calm the nervous system, except when under stress. In fact, this oddball receptor does the opposite: it responds to one of the body's stress-reducing hormones, THP, by revving up the nerves and raising anxiety. (See how to prevent illness at any age...
...also points to an intriguing 2002 study by San Diego State psychologist Robert McGivern that showed that certain cognitive processes become temporarily less efficient at puberty. McGivern and his associates timed 300 subjects, ages 10 to 22, as they did a very simple set of matching tasks involving pictures of facial expressions and words describing them (happy, angry, sad). The study found that around the onset of puberty (about age 11 for girls and 12 for boys), people take significantly longer to do this easy task. McGivern and his associates attributed the slow pace to the excess number of synapses...
...take notes on the recommended adjustments to her daughter's medications. "I was a little apprehensive about my daughter not being face to face with the doctor," says Chavez. "But the conversation was just as good as if we were in person." (See how to prevent illness at any age...
...more than 20 years before she was elected to Congress at the age of 47, Nancy Pelosi's full time job was rearing her five children. She calls it invaluable training for her current job as the first woman Speaker of the House, in which managing her 253-member caucus can be a daily challenge. "Having raised that many children and grandchildren she has eyes in the back of her head," says Rep. Chris Van Hollen, a Maryland Democrat and an assistant to the Speaker. As Pelosi, 69, nears the most important vote of her career, she'll need...