Mental Retardation News and Research

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Two regions of the human genome that appear to explain variation in IQ

It may be that IQ tests are not the only way to measure human intelligence. Scientists at The Queensland Institute of Medical Science (QIMR) have identified two regions of the human genome that appear to explain variation in IQ. Their work was published this week in the American Journal of Human Genetics and has drawn world-wide interest.

19 Jul 2005

Researchers find genetically controlled brain mechanism responsible for social behavior in humans

Researchers at the National Institute of Mental Health (NIMH) have discovered a genetically controlled brain mechanism responsible for social behavior in humans--one of the most important but least understood aspects of human nature.

13 Jul 2005

Researchers discover genetically controlled brain mechanism responsible for social behavior in humans

Researchers at the National Institute of Mental Health (NIMH) have discovered a genetically controlled brain mechanism responsible for social behavior in humans - one of the most important but least understood aspects of human nature. The findings are reported in Nature Neuroscience.

11 Jul 2005

New tool to help healthcare professionals treat children with autism

A new classification tool may allow healthcare professionals treating children with autism and autism-related disorders to more systematically sort out the combination of traits in the condition, and to better predict how children may improve over time.

6 Jul 2005

Routine immunization virtually eliminates major killer of young children in the Gambia

The Lancet has today published online new research from a team led by the UK Medical Research Council's Richard Adegbola showing that routinely vaccinating infants against H. influenzae type b (Hib) - a bacterium that causes deadly diseases including pneumonia and meningitis - has virtually eliminated Hib meningitis in The Gambia.

29 Jun 2005

Researchers successfully treat laboratory model of a lysosomal storage disease called GM1

Physicians might one day be able to treat a disease that destroys brain cells in children using genetically modified cells to transport a "drug" to the site of the dying neural cells (cells that transmit impulses).

27 Jun 2005

Foxp2 gene plays an essential role in the development of social communication

The association between Foxp2 and language was first identified in a family in which half the members had severe speech and grammar impairments. Studies showed that all the affected family members had a mutation in the Foxp2 gene.

21 Jun 2005

Research shows self-selected treatment, punishment reduces destructive behavior

Punishment is often a necessary ingredient in any method aimed at making aggressive special-needs children less destructive, according to new research in the Journal of Applied Behavior Analysis.

21 Jun 2005

Fragile-X-syndrome research

The fragile-X-syndrome is the most common hereditary form of mental retardation and occurs much more often in boys than in girls.

20 Jun 2005

'Brown fat cells' hold clues for possible obesity treatments

Joslin Diabetes Center scientists have discovered a group of genes that govern the genesis of calorie-burning fat cells. This discovery may lead to novel ways to treat obesity in humans.

26 May 2005

Global project to combat parasites that cause cancer and infection in millions

Many cancers are associated with infections (for example cervical cancer is linked to the human papilloma virus) but there is no stronger link between a human malignancy and a parasitic infection than that between cancer of the bile ducts and a liver fluke called Opisthorchis viverrini.

18 May 2005

Specific behaviors seen in infants can predict autism, new research shows

Canadian researchers have become the first to pinpoint specific behavioral signs in infants as young as 12 months that can predict, with remarkable accuracy, whether a child will develop autism.

1 May 2005

Fickle enzyme helps protect, but also can promote heart failure

Enzymes that make the gas nitric oxide (NO) not only protect the heart from damage due to high blood pressure or a heart attack, but also promote heart failure through overgrowth and enlargement of the muscle tissue, say animal researchers at Johns Hopkins.

26 Apr 2005

Breakdown in brain cell communication may contribute to the most common biochemical cause of mental retardation

The process is akin to a baseball game gone bad. Imagine if a pitcher were joined by six players simultaneously winding up on the mound. Crouched behind home plate, the single catcher would soon be overwhelmed. Even if the coach sent in teammates to catch the extra balls, confusion would reign on the field.

12 Apr 2005

Dozens of new genes identified in X chromosome

By intensely and systematically comparing the human X chromosome to genetic information from chimpanzees, rats and mice, a team of scientists from the United States and India has uncovered dozens of new genes, many of which are located in regions of the chromosome already tied to disease.

3 Apr 2005

Clinical study of mirror neurons provides insights into autism and other disorders

Seeing is doing – at least it is when mirror neurons are working normally. But in autistic individuals, say researchers from the University of California, San Diego, the brain circuits that enable people to perceive and understand the actions of others do not behave in the usual way.

29 Mar 2005

Protecting children from industrial chemicals in the environment

American children are likely to face serious health consequences from new and existing industrial chemicals in the environment, argue a group of researchers in a report in this month's premier open-access global health journal PLoS Medicine.

29 Mar 2005

Mutations in newly discovered gene, NPHP5 cause Senior-Loken syndrome

Scientists at the University of Michigan Medical School have discovered a gene called NPHP5 and found mutations in this gene that cause a rare genetic disease called Senior-Loken syndrome. Children with this syndrome develop a type of cystic kidney disease called nephronophthisis, as well as a form of blindness called retinitis pigmentosa.

3 Mar 2005

Possible treatment for Fragile X syndrome

The first evidence for a possible treatment for Fragile X syndrome, one of the leading inherited causes of mental retardation, has emerged from experiments with a mutant fruit fly that exhibits characteristics of the disorder.

2 Mar 2005

New findings challenge one of the established views of how nerve cells communicate with one another

Every time we move, feel emotions, think or remember, the nerve cells, or neurons, in our body transmit messages to one another via chemical signals called neurotransmitters. Within neurons are tiny organelles called synaptic vesicles that sequester neurotransmitters and release them when needed into the synapse, or space between nerve cells, where the chemical signal is transmitted to other neurons.

16 Feb 2005