CELL BIOLOGY: Not So Identical Twins
نویسندگان
چکیده
منابع مشابه
"Not-so-identical" twins with trisomy 21 and perimembranous ventricular septal defects.
While trisomy 21 is a common genetic disorder in singletons, the incidence among identical twins is very rare, occurring in approximately 1-2 per 1000 twin gestations. Trisomy 21 is associated with high incidence of congenital heart defects, and commonly occurs with ventricular septal defects (VSDs). Physiologic burden of VSDs depends on prevalence of anatomic and other circulatory factors. A c...
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Human cognition and action are intentional and goal-directed, and explaining how they are controlled is one of the most important tasks of the cognitive sciences. After half a century of benign neglect this task is enjoying increased attention. Unfortunately, however, current theorizing about control in general, and the role of consciousness for/in control in particular, suffers from major conc...
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Narcolepsy has been observed in chronic encephalitis, cerebral arteriosclerosis, brain tumour, and following trauma, but when these cases are excluded there remains a group without demonstrable brain pathology. The existence of this idiopathic group has been a controversial subject. Among the more impressive evidence is that suggesting a hereditary factor in idiopathic narcolepsy. To date this ...
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In 1997, a 55-year-old man underwent percutaneous coronary angioplasty (PTCA) of a lesion in the middle segment of the left anterior descending coronary artery (LAD) (Figure, A). He subsequently informed his cardiologist that his twin brother had also been treated successfully with PTCA at another hospital for stenosis of the LAD. The cineangiographic film of the twin brother was retrieved (Jac...
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ژورنال
عنوان ژورنال: Science
سال: 2008
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.320.5884.1697a