Word: nucleus
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Many brain parts became active in our love-struck subjects when they focused on their beloved. However, two regions appear to be central to the experience of being in love. Perhaps our most important finding concerned activity in the caudate nucleus. This is a large, C-shaped region that sits deep near the center of your brain. It is very primitive--part of what is called the reptilian brain because it evolved long before mammals proliferated, some 65 million years ago. Our brain scans showed that parts of the body and the tail of the caudate became particularly active...
...deteriorating security situation is only half the Administration's problem. Long before last week's policy change, it had become evident that the Governing Council has not gelled into a body that can be presented--to Iraqis or a skeptical world--as the nucleus of Iraqi self-rule. The council's performance has been lackluster. At times in the past four months, half its members have been outside the country. Some continue to have primary homes where they lived in exile, and few have bothered to travel around Iraq to build support for the body's authority. On the Iraqi...
...solid rotation may be the second goal, but the season’s primary objective is rebuilding the nucleus of a program that used to be constructed on the backs of Prasse-Freeman, Harvey and Merchant...
...using a technique developed by Dr. James Grifo at New York University, Dr. Zhuang Guanglun of Sun Yat-sen University in Guangzhou took the patient's fertilized egg, scooped out the chromosome-bearing nuclear material and put it in a donated egg whose nucleus had been removed. In this more benign environment, development proceeded normally, and the woman became pregnant with triplets who carried a mix of her DNA and her husband's--pretty much like any normal baby...
What has some doctors and ethicists upset is that this so-called nuclear-transfer technique has also been used to produce clones, starting with Dolly the sheep. The only significant difference is that with cloning, the inserted nucleus comes from a single, usually adult, cell, and the resulting offspring is genetically identical to the parent. Doing that with humans is ethically repugnant to many. Besides, for reasons that aren't yet well understood, cloned animals often abort spontaneously or are born with defects; Dolly died very young, though she had seemed healthy. And because the Chinese woman's twins were...