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Old-age survival has increased substantially since 1950. Death rates decelerate with age for insects, worms, and yeast, as well as humans. This evidence of extended postreproductive survival is puzzling. Three biodemographic insights--concerning the correlation of death rates across age, individual differences in survival chances, and induced alterations in(More)
Hand movement recovery and cortical reorganization were studied in 10 subjects with chronic stroke using functional MRI (fMRI) before and after training with an intensive finger movement tracking programme. Subjects were assigned randomly to a treatment or control group. The treatment group received 18-20 sessions of finger tracking training using target(More)
It is generally assumed for most species that mortality rates increase monotonically at advanced ages. Mortality rates were found to level off and decrease at older ages in a population of 1.2 million medflies maintained in cages of 7,200 and in a group of approximately 48,000 adults maintained in solitary confinement. Thus, life expectancy in older(More)
Although variation in mortality is considered by virtually all vector-borne disease specialists to be one of the most important determinants of an arthropod's capacity to transmit pathogens, the operational assumption often is that insect vector mortality is independent of age. Acceptance of the non-senescence assumption leads to the erroneous conclusion(More)
To determine reliabilities within and between persons measuring cervical active range of motion (AROM) three methods were examined: use of a cervical-range-of-motion (CROM) instrument, use of a universal goniometer (UG), and visual estimation (VE). Measurements were made on 60 patients with orthopedic disorders of the cervical spine who were divided into(More)
REVIEWS T he attempt to remove or reduce the density of a species , even an exotic one, is a challenging undertaking. Eradi-cation is the removal of every potentially reproducing individual of a species or the reduction of their population density below sustainable levels. Many eradication programs are carried out over thousands of hectares, although others(More)
BACKGROUND AND PURPOSE Residual motor deficits frequently linger after stroke. Search for newer effective strategies to promote functional recovery is ongoing. Brain stimulation, as a means of directing adaptive plasticity, is appealing. Animal studies and Phase I and II trials in humans have indicated safety, feasibility, and efficacy of combining(More)
Many compounds hold promise for pharmacologic manipulation of aging. However, such claims are difficult to investigate due to time and budget constraints. Here, we took a comparative approach, using short-lived invertebrate species, to directly test the effects of two tocopherols (Vitamin E) on longevity. gamma-Tocopherol represents the most abundant(More)
  • J R Carey
  • 1990
This study evaluated the effects of manual stretch of extrinsic finger flexor muscles on finger extension movement control and force control in 16 spastic hemiparetic subjects. These subjects were randomly divided into a control group and an experimental group. A group of able-bodied subjects also participated. A joint-movement tracking test (JMTT)(More)
Reproduction exacts a price in terms of decreased survival. Our analysis of the interplay between age patterns of fecundity and mortality for individual female medflies (Ceratitis capitata) revealed that individual mortality is associated with the time-dynamics of the egg-laying trajectory. In a sample of 531 medflies, we found that each individual has a(More)