Social Sciences
When it comes to estimating the intelligence of various animal species, it may be as simple measuring overall brain size. In fact, making corrections for a species' body size may be a mistake. The findings were reported by researchers at Grand Valley State University and the Anthropological Institute and Museum at the University of Zürich, Switzerland.
"It's long been known that species with larger body sizes generally have larger brains," said Robert Deaner, assistant professor of psychology at Grand Valley and the first author on the study. "Scientists have generally assumed that this…
Yes, there are gender differences in cognitive function, but they're more limited than previously thought. And yes, income does affect cognitive performance – but less than expected when only healthy children are considered. And while basic cognitive skills steadily improve in middle childhood, they then seem to level off – questioning the idea of a burst of brain development in adolescence.
These findings, published online on May 18 in the Journal of the International Neuropsychological Society, are the first data to emerge from the National Institutes of Health (NIH) MRI Study of Normal…
Most animals appear symmetrical at first glance, but we're full of internal lop-sidedness. From the hand used to pick up a pencil or throw a baseball, to where language is generated in the brain, to the orientation of our internal organs, humans are a glut of asymmetries. Worms aren't so different: The roundworm Caenorhabditis elegans has nerves on its left and right sides that perform different functions. Like handedness, the determination of which nerves develop on which side seems random from worm to worm.
But now, Rockefeller University and Howard Hughes Medical Institute scientists…
Children who are hyperactive tend to do worse academically than their peers who are not hyperactive. Although the relationship between such behaviors as overactivity, impulsivity, and inattentiveness in children and poor achievement in math, reading, language, and other areas has been well documented, little is known about the reasons for this link. New research shows that the tie may be due to genetic influences.
The study, conducted by researchers at Boston University and at the Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry in London, appears in the May/June…
Implanting dopamine generators (dopaminergics) in brain cells has produced improvement in the symptoms in Parkinson's, according to the results of tests carried out with monkeys by the Navarra University Hospital, led by Dr María Rosario Luquin Piudo, neurologist at the Hospital and at the other Navarra University-based medical centre, CIMA (the Research Centre for Applied Medicine).
The results have been published in the latest issue of the British scientific journal specialising in Neurology, Brain, and have corroborated the conclusions of a previous study, published in 1999 by the same…
Free will and true spontaneity exist … in fruit flies. This is what scientists report in a groundbreaking study in the May 16, 2007 issue of the open-access journal PLoS ONE.
"Animals and especially insects are usually seen as complex robots which only respond to external stimuli," says senior author Björn Brembs from the Free University Berlin. They are assumed to be input-output devices. "When scientists observe animals responding differently even to the same external stimuli, they attribute this variability to random errors in a complex brain."
Using a combination of automated behavior…
Swedish researchers have found a way to increase the weight of people with Alzheimer's, by improving communication and patient involvement, altering meal routines and providing a more homely eating environment. Patients who gained weight also displayed improved intellectual abilities.
During the three-month study, published in the May issue of Journal of Clinical Nursing, 13 of the 18 patients in the intervention group put on weight, compared with just two of the 15 patients in the control group.
"Weight loss is a common issue among people with dementia and in particular Alzheimer's"…
Antipsychotic drugs do most of their work in the brain, but they also leave behind in the bloodstream a trail of hundreds of chemicals that may be used in the future to direct better treatment for schizophrenia and other psychiatric conditions, say Duke University Medical Center researchers.
The study is among the first to use metabolomics -- the measurement of thousands of chemical byproducts of the body's cellular processes -- to look at a psychiatric disease and its response to therapy, according to the researchers.
"Doctors draw blood every day to look at metabolites such glucose and…
Research conducted by Wayne Hochwarter, a professor of management in FSU’s College of Business, documents that Americans’ work attitudes have been affected as the cost to fill a tank of gas has nearly doubled over the past few years. In his research, approximately 1,000 full-time employees were asked to note how gas prices have affected their disposable spending patterns. They also were asked how these changes affected their stress levels and willingness to participate at work. (Respondents, who worked in both blue- and white-collar occupations, reported paying an average of $2.83 a gallon…
Parkinson's disease is well-known for its progression of motor disorders: stiffness, slowness, tremors, difficulties walking and talking. Less well known is that Parkinson's shares other symptoms with narcolepsy, a sleep disorder characterized by sudden and uncontrollable episodes of deep sleep, severe fatigue and general sleep disorder.
Now a team of UCLA and Veterans Affairs researchers think they know why — the two disorders share something in common: Parkinson's disease patients have severe damage to the same small group of neurons whose loss causes narcolepsy. The findings suggest a…