July 1st, 2011 by Berci in News
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Did you know that Natalie Portman (under the name, Natalie Hershlag) published a paper in a scientific journal in 2002 while at Harvard?
Frontal lobe activation during object permanence: data from near-infrared spectroscopy.
The ability to create and hold a mental schema of an object is one of the milestones in cognitive development. Developmental scientists have named the behavioral manifestation of this competence object permanence. Convergent evidence indicates that frontal lobe maturation plays a critical role in the display of object permanence, but methodological and ethical constrains have made it difficult to collect neurophysiological evidence from awake, behaving infants. Near-infrared spectroscopy provides a noninvasive assessment of changes in oxy- and deoxyhemoglobin and total hemoglobin concentration within a prescribed region. The evidence described in this report reveals that the emergence of object permanence is related to an increase in hemoglobin concentration in frontal cortex.
*This blog post was originally published at ScienceRoll*
January 31st, 2011 by Dinah Miller, M.D. in Health Tips, Research
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Meditation sounds like a great idea from the perspective of a psychiatrist: Anything that calms and focuses the mind is a good thing (and without pharmaceuticals, even better).
Personally, I tried transcendental meditation as a kid (more to do with my mother than with me) and found it to be boring. I have trouble keeping my thoughts still. They wander to what I want for dinner, and should I write about this on Shrink Rap, and will Clink and Victor ever eat crabcakes with me again, and did I remember to give my last patient informed consent, and a zillion other things. Holding my thoughts still is work.
The New York Times Well blog has an article on meditation and brain changes. In “How Meditation May Change the Brain,” Sindya N. Bhanoo writes:
The researchers report that those who meditated for about 30 minutes a day for eight weeks had measurable changes in gray-matter density in parts of the brain associated with memory, sense of self, empathy and stress. The findings will appear in the Jan. 30 issue of Psychiatry Research: Neuroimaging.
M.R.I. brain scans taken before and after the participants’ meditation regimen found increased gray matter in the hippocampus, an area important for learning and memory. The images also showed a reduction of gray matter in the amygdala, a region connected to anxiety and stress. A control group that did not practice meditation showed no such changes.
Lower stress, lower blood pressure, higher empathy. I may have to give meditation another try.
*This blog post was originally published at Shrink Rap*
August 17th, 2010 by Medgadget in Better Health Network, News, Research
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A team of researchers at King’s College of the University of London (KCL) has developed a brain scan which can purportedly detect autism in adults. The scan, which uses MRI to obtain images of the brain, can identify autism based on the physical makeup of grey matter in the brain. Results of an initial study involving the scan were published in the Journal of Neuroscience today.
From the article:
The team used an MRI scanner to take pictures of the brain’s grey matter. A separate imaging technique was then used to reconstruct these scans into 3D images that could be assessed for structure, shape and thickness — all intricate measurements that reveal Autism Spectrum Disorder (ASD) at its root.
The research studied 20 healthy adults, 20 adults with ASD, and 19 adults with ADHD. All participants were males aged between 20 and 68 years. After first being diagnosed by traditional methods (an IQ test, psychiatric interview, physical examination and blood test), scientists used the newly-developed brain scanning technique as a comparison. The brain scan was highly effective in identifying individuals with autism and may therefore provide a rapid diagnostic instrument, using biological signposts, to detect autism in the future.
KCL’s press release: Adult autism diagnosis by brain scan…
Abstract in the Journal of Neuroscience: Describing the Brain in Autism in Five Dimensions — Magnetic Resonance Imaging-Assisted Diagnosis of Autism Spectrum Disorder Using a Multiparameter Classification Approach…
*This blog post was originally published at Medgadget*
April 25th, 2010 by Medgadget in Better Health Network, Research
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Scientists at Rutgers University are studying the female orgasm using functional MRI (fMRI).
During the experiment, women masturbate with the help of a dildo inside the fMRI machine so the team can study which areas of the brain are activated by arousal.
First they map the cervix, uterus, and clitoris to regions of the brain to create a sort of sexual homunculus. Then the women get ten minutes to stimulate to an orgasm, which is signaled to the researchers by raising a hand. Read more »
*This blog post was originally published at Medgadget*
