Scientists recently discovered, a leading to birds differentiation gene mutation, is likely to make the human death time predictions become a reality. This study will contribute to help people more accurately schedule from the work of medical services, but also for very weak patients with additional condition information.
Department of Neurology, University of Toronto assistant professor, Dr. Andrew Lin said in a statement, before the twin and family members of the study has shown that, the human body biological clock delay or advance can be hereditary, and animal experimental results show, some special genes can influence the biological clock delay or advance.
Andrew Lin before at Beth Israel Deaconess Medical Center to do postdoctoral, and neurological department of Internal Medicine Director Clifford Sabel's research team. They were study of elderly people with sleep disorders. Andrew Lin also participated in the Chicago Rush university is a 1200 experimenters experiment. This 1200 as healthy. 65 years old, will receive each year in neurology and psychiatry examination.
The study 's primary purpose is to find out Parkinson's disease and Alzheimer's disease onset aura-like. Experimenters received sleep -- wake analysis, and agreed in postmortem brain donated, in order to provide scientists with death before one year within sleep wake mode information. However, when Andrew Lin learned of the experimenter has gene recording information, he and the Blegen women's Hospital (BWH ) researchers compared between the patient's sleep - wake patterns and genotype.
Study found that, in the two group of sleep wake mode different experimenters appeared in the gene differentiation in a "Period 1 " gene, the presence of a nucleotide site differences. 60% of the human genome in this position base for adenine ( A ), while 40% of the people in this location of the base for guanine ( G ). Everyone has two sets of genomic, therefore to one person, this site has a probability of approximately 36% to A-A, about 16% of the probability of G-G type, and heterozygous genotype probability for 48%.
Dr. Sabel said in a statement: " with A-A genotype people than type G-G people wake up early for about 1 hours, while type A-G gene people wake up time was in two between. " Dr Sabel is a Harvard Medical School professor of neurobiology " Pu Nantes ". He added, with type G-G gene, its brain cells and white blood cells " Period 1 " gene expression than type A-A people are low, but only in the daytime to normal expression of the gene.
When the researchers checked again when dying patients, they found, this genotype could predict about 6 hours of the time of death. With type A-A and A-G genotypes of patients mean death time of about 11 in the morning, and the G-G genotype of the patients usually die before 6 in the afternoon.
Andrew Lam said, future research will focus on this gene ( as well as other genes ) affect human body biological clock mechanism . The study will help people to optimize the schedule, and because of the time difference and the shift caused by the biological clock to provide new therapies.
Wrinkles and more female bones
The United States Yale University researchers on 114 early menopause (menopause women less than 3 years ) were examined after contrast pointed out, the elasticity of the skin and bone density are closely related. The researchers evaluated these women face and neck wrinkles the volume and depth, testing their forehead and cheek skin flexibility and bone density. It was found, wrinkles more serious, bone density is lower, and this connection involves bones, including the pelvis, lumbar and ankle.
The face and forehead skin more compact, mean bone density is high. While the formation of the exact reason for the association is unknown, but experts said the bones and skin, have one thing in common, i.e. collagen collagen loss bring skin changes, such as ptosis, wrinkles, while causing the bone in the quality and quantity of degradation, osteoporosis.
If wrinkles middle-aged women than their peers, the best go to the hospital to check on bone mineral density in elderly women by wrinkles. How to roughly evaluate bone mineral density level. More attention to supplement collagen, eat more foods rich in collagen, such as pig, pig, Eleusine indica, with stew is practice.
Maternal flu or increased infantile autism risk
Researchers in the United States a new " Pediatrics " the report said, pregnant women suffering from flu or have a fever for more than a week, may raise their children autism risk.
In an analysis of 1997 to 2003 was born baby and its mother data after Denmark, Danish researchers at Aarhus University found that, if a pregnant woman suffering from influenza, their children before the age of 3, was diagnosed with autism risk doubled; if the pregnant woman have a fever that lasts for more than a week, the children before the age of 3, was diagnosed with autism risk increased by two times . "The researchers said, the results might be explained by the bacteria, virus, will stimulate the parent body of the immune system, which may affect fetal brain development.
" Love makes people crazy " was originally " the dopamine "
Someone says " love is blind ", also someone says " love makes people crazy ." British researchers found by scanning the brain, who fall in love will have some changes in brain tissue, from a scientific point of the interpretation of these claims.
University College London professor Zemia Zaki neural aesthetics design an experiment, to volunteer to watch their lover or " enemies " pictures, and then using magnetic resonance imaging scans of their brain. Results show, watching love photo, the research object of the brain responsible for judgment and reasoning in the prefrontal cortex of reduced activity. This means they on the other side of no doubt or critical of. "Enemy " while watching the picture, the prefrontal cortex became active . In addition, the brain and fear related to the amygdala, and negative mood were related to the middle temporal cortex and the transference effect in relation to the posterior cingulate cortex activity decreased or even " off".
Research shows, people in love is in higher level of dopamine in the brain, whereas serotonin secretion is reduced. Dopamine is your brain " reward " chemicals . In reward, dopamine levels increased rapidly, followed by a rapid decline. Previous studies showed that, the drug also let the brain dopamine release, conveying the excitement and happiness the signals produced by the body. Serotonin is a neurotransmitter, the nerve passed between the channels of information, it will affect people's appetite, driving force and mood.
Another love changes in the hormone adrenaline is. Epinephrine is a hormone secreted by the adrenal medulla, emotion can influence the secretion of adrenaline, such as tension will increase the secretion of adrenaline. Research shows, adrenergic make myocardial contractility, improve enhance excitability, conduction speed, increased cardiac output. That is to say, people in love to see lovers feel similar drug craving for drugs.
Psychologists attention why love can make people more control to enhance the clinical psychologist, writer David Nillas focused on British stalker phenomenon, think this behavior although extreme, but from a certain extent explains why people fall in love will make an unbelievable things.
In " unilateral love" stalker is a notable character is overly emotional and imaginative.
Niasse thinks, if that person to be able to change way of thinking training, then can get rid of obsessive-compulsive disorder, and for his behaviour amazed.