New Blood Test Can Predict Alzheimer’s Disease
For years doctors have been able to detect the early symptoms of Alzheimer’s disease through scans, lumbar punctures, and genetic testing. While these methods can be painful or expensive, a new blood test has recently been discovered that can easily and accurately predict the onset of Alzheimer’s disease.
Doctor Howard J. Federoff of Georgetown University Medical Center conducted a research study in which he took blood samples from hundreds of healthy, elderly men and women over the age of 70. Over the next five years, some of these healthy individuals developed Mild Cognitive Impairment or Alzheimer’s Disease. Federoff then compared their blood samples to the samples of the healthy individuals. He found a group of ten lipids, or fats, that were present in lower amounts in the blood samples of the participants who had developed Alzheimer’s Disease.
A Different Way to Exercise
Does the gym seem too far away? Do you feel like you don’t have time to exercise? There may be some good news for couch potatoes like ourselves. Studies are showing that watching a sport causes some of the same physiological effects as actually working out . While watching others exercise, heart rate, respiration, skin blood flow, and sweat release all increase as if you were exercising.
Researchers at the University of Western Sydney inserted fine needles into an outer nerve of volunteers who were shown a static image followed by a video of a jogger for 22 minutes. With these needles, the scientists were able to record electrical signals within nerve fibers that innervate blood vessels. These recordings provided measures of the body’s physiological stress response, particularly muscle sympathetic nerve activity.
The study showed that sympathetic nerve activity increased when volunteers watched the jogger. In comparison, observing the static image caused change in activity. The sympathetic nervous system innervates the heart, sweat glands, and blood vessels, and its activity increases during exercise. This study indicates that its activity also increases while watching another person exercise, indicating that there may be some benefit.