Xem 1-20 trên 25 kết quả Brain aging
  • Thinking Skills are some of the most valuable skills you can learn today. The reason is simple. While in the past, people went to work for their manual skills, today they go to work for their mental skills. We live in an Information Age, no longer an Industrial Age. That’s why brain has replaced brawn, and strength in thinking has replaced strength in muscles. No matter what kind of business you work for, nor what kind of job you do, today you are expected to apply a range of thinking skills to the work you carry out. This includes using...

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  • As the population of over 76 million Baby Boomers approaches middle age and beyond, the issue of preserving mental powers throughout greatly increased life spans has reached an almost fever pitch. There is a growing interest in—and optimism about—preserving and enhancing the brain's capabilities into senior years. With the help of powerful new tools of molecular biology and brain imaging, neuroscientists around the world have literally been looking into the mind as it thinks.

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  • By adopting the brain healthy strategies detailed in Use Your Brain to Change Your Age, you can outsmart your genes, put the brakes on aging, and even reverse the aging process. If you change your brain,…

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  • This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1989-01-01 edition. Excerpt: ... subject with proper alignment of the planes of section. This will be both expensive and time-consuming; however, at least in selected cases (e.g., cases of aging and dementia with brain atrophy), such an interaction will be essential. More speculative will be the use of MRI to further constrain PET data by defining gray-white matter differences.

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  • The production of free radicals (ROS) is an unavoidable consequence of life in an aerobic environment. Free radicals produced from the metabolic activities of oxygen attack biological membranes and lipoproteins via oxidation in a process called lipid perioxidation. This attack damages cells and lipids often in a chain reaction with carbon-based molecules such as polyunsaturated fatty acids (PUFA) in a reaction with molecular oxygen. This creates oxidative stress and damage to tissues. Free radicals also damage chromosomal DNA.

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  • The pelvic examination begins with a visual inspection of the external geni- talia using the assistance of a good light source. Although skin cancer is rare in this region, it is often diagnosed late. Vulvar cancer can be hyperpig- mented, erythematous, or hypopigmented, and any such lesions require care- ful evaluation and often biopsy (see Chapter 17). Lichen sclerosus is a relatively common condition in which the vulvar skin may appear like parch- ment. It is more common in postmenopausal women, but occurs in all ages, and can be associated with cancer. ...

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  • To better understand the international perspective of public policies for the elderly, in line with the parameters that serve as tendencies for national policies, one must contextualize international health conferences that had health promotion as their central topic. Since the Declaration of Alma-Ata, in 1978(5), it has been noted that measures and characteristics of health promotion imply a search for healthier life styles and active aging. Health promotion is seen as a process of community qualification, aiming to improve life and health conditions.

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  • As the rupture most commonly occurs in “mid-aged” persons (in the most creative and productive part of life), the highest effort should be put in enabling patients to return to previous activities as soon as possible. There is universal agreement that functional treatment is the most effective way in this regardless of the used conservative or operative (open or percutaneous) method.

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  • Deprivation and exclusion are one of the common phenomena in almost all-ageing societies. The elderly in the developing countries also suffer from chronic deprivation and poverty as socio-economic relations change. Studies on the livelihood pattern of the aged in Africa show that poverty among the elderly is one of the challenges in the new millennium (Williams, 2003).

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  • Objective: Previous research suggests that engaging in mentally stimulating tasks may improve brain health and cognitive abilities. Using computer search engines to find information on the Internet has become a frequent daily activity of people at any age, including middleaged and older adults.

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  • Cellular manifestations of aging are most pronounced in postmitotic cells, such as neurons and cardiac myocytes. Alterations of these cells, which are responsible for essential functions of brain and heart, are particularly important contributors to the overall aging process. Mitochondria and lysosomes of postmitotic cells suffer the most remarkable age-related alterations of all cellular organelles.

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  • The kynurenine pathway of tryptophan catabolism plays an important role in several biological systems affected by aging. We quantified tryptophan and its metabolites kynurenine (KYN), kynurenine acid (KYNA), picolinic acid (PIC) and quinolinic acid (QUIN), and activity of the kynurenine pathway enzymes indoleamine 2,3-dioxygenase

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  • It was 2538 years After the Year of the Son of Man. For six centuries mankind had been developing machines. The Ear-apparatus was discovered as early as seven hundred years before. The Eye came later, the Brain came much later. But by 2500, the machines had been developed to think, and act and work with perfect independence. Man lived on the products of the machine, and the machines lived to themselves very happily, and contentedly. Machines are designed to help and cooperate. It was easy to do the simple duties they needed to do that men might live well. And men had created them.

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  • Eisenmenger’s syndrome occurs before the age of 1 year in children with very high pulmonary blood flow, such as unrepaired AVSD, but may occur at the age of 40-50 years in adults with unrepaired ASD who have had moderately increased pulmonary blood flow over many years. Corrective cardiac surgery to avoid Eisenmenger’s must be undertaken before the onset of pulmonary vascular disease, the ideal age dependent on the severity of the underlying lesion.

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  • Alzheimer’s disease (AD) is an age-related, progressive degenerative dis-order that is characterized by synapse and neuron loss in the brain and the accumulation of protein-containing deposits (referred to as ‘senile plaques’) and neurofibrillary tangles. Insoluble amyloid b-peptide (Ab) fibrillar aggregates found in extracellular plaques have long been thought to cause the neurodegenerative cascades of AD.

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  • International migrants include rural and urban women and men with different socio-economic profiles and ages. Some are highly educated and specialized people (whose migration is referred to as ‘brain drain’). Some are poor people for whom migration is a subsistence strategy. The United Nations Population Fund (UNFPA) estimates that the typical profile of migrants comprises young women and men from 15 to 35 years of age, 8 generally belonging to medium and low socio- economic groups, but not to the poorest segments of society (Hatton and Williamson 2004, 1-30).

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  • Multiple sclerosis (MS) is not a new disease. Its effects on the brain were described in the 1830s, and it was identified as a distinct clinical entity in the 1860s. In fact, writings from the Middle Ages appear to describe individuals with this condition. MS is the most common neurological disorder of young adults; there are approximately 350,000 people with MS in the United States and an estimated 2 million patients worldwide. Research on the disorder has been energetic over recent decades. In 1996, the U.S. National Institutes of Health (NIH) spent almost $83 million on MS research.

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  • There are two main types of brain cancer. Primary brain cancer starts in the brain. Metastatic brain cancer starts somewhere else in the body and moves to the brain. According to the American Brain Tumor Association, brain tumors are the most common of the solid tumors in children, and the second most frequent malignancy of childhood. Brain tumors are the second leading cause of cancer-related deaths in males under 40 and the second leading cause of cancer-related deaths in females under age 20.

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  • "Jenny, my dear maid, thou wilt never fetch white meal out of a sack of sea-coal." Jenny tossed her head. It would have been a nice little brown head, if it had not been quite so fond of tossing itself. But Jenny was just sixteen, and laboured under a delusion which besets young folks of that age--namely, that half the brains in the world had got into her head, and very few had been left in her grandmother's. "I don't know what you mean, Grandmother," said Jenny, as an accompaniment to that toss....

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  • Television has attracted young viewers since broadcasting be- gan in the 1940s. Concerns about its effects on the cognitive devel- opment of young children emerged almost immediately and have been fueled by academic research showing a negative association between early-childhood television viewing and later academic achievement. 1 These findings have contributed to a belief among the vast majority of pediatricians that television has “negative effects on brain development” of children below age five (Gentile et al. 2004).

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