Navigation Links
Scientists afflict computers with schizophrenia to better understand the human brain
Date:5/5/2011

AUSTIN, TexasComputer networks that can't forget fast enough can show symptoms of a kind of virtual schizophrenia, giving researchers further clues to the inner workings of schizophrenic brains, researchers at The University of Texas at Austin and Yale University have found.

The researchers used a virtual computer model, or "neural network," to simulate the excessive release of dopamine in the brain. They found that the network recalled memories in a distinctly schizophrenic-like fashion.

Their results were published in April in Biological Psychiatry.

"The hypothesis is that dopamine encodes the importance-the salience-of experience," says Uli Grasemann, a graduate student in the Department of Computer Science at The University of Texas at Austin. "When there's too much dopamine, it leads to exaggerated salience, and the brain ends up learning from things that it shouldn't be learning from."

The results bolster a hypothesis known in schizophrenia circles as the hyperlearning hypothesis, which posits that people suffering from schizophrenia have brains that lose the ability to forget or ignore as much as they normally would. Without forgetting, they lose the ability to extract what's meaningful out of the immensity of stimuli the brain encounters. They start making connections that aren't real, or drowning in a sea of so many connections they lose the ability to stitch together any kind of coherent story.

The neural network used by Grasemann and his adviser, Professor Risto Miikkulainen, is called DISCERN. Designed by Miikkulainen, DISCERN is able to learn natural language. In this study it was used to simulate what happens to language as the result of eight different types of neurological dysfunction. The results of the simulations were compared by Ralph Hoffman, professor of psychiatry at the Yale School of Medicine, to what he saw when studying human schizophrenics.

In order to model the process, Gr
'/>"/>

Contact: Uli Grasemann
uli@cs.utexas.edu
512-203-3501
University of Texas at Austin
Source:Eurekalert

Page: 1 2 3

Related medicine news :

1. K-RITH awards grants to foster teamwork among South African TB/HIV scientists
2. Scientists show that HIV drugs can also target tropical parasites
3. March of Dimes awards $250,000 prize to scientists who explained human sex chromosomes
4. Scientists create stable, self-renewing neural stem cells
5. Musicians and scientists to research mind and music at Rice University conference
6. Scientists Discover How Peppermint Soothes Gastric Pain
7. Scientists develop compound that effectively halts progression of multiple sclerosis
8. Scientists Spot Key Gene Mutations in Melanoma
9. Illusion can halve the pain of osteoarthritis, scientists say
10. Berkeley Lab scientists find that normal breast cells help kill cancer cells
11. Artery Plaque Forms in Short Time Span, Scientists Say
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/24/2015)... 25, 2015 Pacific Prime has announced that they ... looking at the cost of individual international health insurance. Titled: ... looks at the cost of health insurance in six top expat ... Hong Kong , Singapore , ... UAE , the UK , Article 2 ...
(Date:5/24/2015)... 2015 Scientists with Cardno ChemRisk, a ... quality compliance issues that may have raised the risk ... has just posted an article on the research. ... group found airborne asbestos levels well above OSHA safety ... and 2011. , “Asbestos compliance sampling data associated with ...
(Date:5/24/2015)... 24, 2015 Medicx Media Solutions ... strategy executive Jay Krihak as its head of ... ramp up its expertise and leadership position in ... and Health sectors. , Krihak is an experienced, ... recently, Krihak led sales planning teams for mobile ...
(Date:5/23/2015)... 2015 Dr. David Benvenuti, an experienced plastic ... a new article to his website that takes ... Benvenuti explained in the fascinating blog, he has recently ... earlobes. , Known as “gauging,” the technique involves placing larger ... Benvenuti said will eventually stretch the holes out to incredible ...
(Date:5/23/2015)... 23, 2015 A live auction will be ... hospitals, surgery centers and other medical facilities around the United ... endoscopy, lab, radiology, surgery, anesthesia, exam and much more. ... and Thursday, May 28 starting at 9:00am CDT each day. ... N. 25th Avenue, Melrose Park, IL 60160. Anyone can ...
Breaking Medicine News(10 mins):Health News:Pacific Prime Releases 2nd Article of Cost of Health Insurance Report 2Health News:New Analysis Finds Too Many Employers Ignored OSHA Asbestos Guidelines, According to Surviving Mesothelioma 2Health News:Medicx Media Solutions Expands Executive Team 2Health News:Dr. Benvenuti, a Plastic Surgeon in Newport Beach, CA, Posts New Article about Repairing Ear Gauges 2Health News:Over 5,200 Lots of Medical Equipment Will Be Sold by Live Auction 2
... implanted in the eye during cataract surgery have led ... a common form// of farsightedness that typically develops in ... School urges people considering this operation to weigh its ... recently developed implantable variable-focus lenses, which enable people to ...
... courthouse in New Jersey was closed following the diagnosis of ... remain shut at// least until Monday. ,State and ... partly due to privacy rules. The woman’s condition has been ... independent title searcher with the Mercer County clerk's office. ...
... Pradesh will soon get calorie-rich and varied midday meals.// ... the state were being served 'khichdi' six times a week ... the menu drab. ,"Now the government has chalked ... vegetables and even an occasional serving of dry fruit," said ...
... seven students at Wheaton College and has caused affected students ... September 7. Mumps causes// swollen glands close to the jaw ... we have a good handle on things, and we are ... for the DuPage County Health Department. "We feel that Wheaton ...
... Pharmaceuticals has announced that exenatide is very effective in ... aspart 30/70 (NovoMix by NovoNordisk). This finding was revealed after ... a boon to people suffering type 2 diabetes and unable ... , ,The study, which spanned a year, ...
... foeticide in Kerala have come as a surprise to politicians ... literacy rate.// ,"The number of girls in the 0-6 ... happened just because of female feticide and nothing else. The ... is happening and who are the guilty," said Health Minister ...
Cached Medicine News:
(Date:5/22/2015)... Md. , May 22, 2015  RegeneRx ... today announced a peer-reviewed publication of the results ... evaluating RGN-259 (RegeneRx,s preservative-free eye drops) for the ... controlled adverse environment (CAE ® ) model.  The ... the results, which were previously disseminated by the ...
(Date:5/22/2015)... 2015 Research and Markets ( ... "Latest Regulations on Pharmaceutical International Multi-Center Clinical ... This is first time in history, ... international multi-center clinical trials of drugs in ... be implemented on March 1, 2015. The guidance ...
(Date:5/22/2015)... 2015  China Nepstar Chain Drugstore Ltd. (NYSE: NPD ... chain in China based on ... resignation of Mr. Fuxiang Zhang as the ... Ms. Rebecca Yingnan Zhang has been appointed ... directors, effective immediately. Meanwhile, Ms. Zhang resigned from the ...
Breaking Medicine Technology:Complete Data from RegeneRx Phase II Dry Eye Trial Published in Current Issue of Clinical Ophthalmology 2Complete Data from RegeneRx Phase II Dry Eye Trial Published in Current Issue of Clinical Ophthalmology 3Complete Data from RegeneRx Phase II Dry Eye Trial Published in Current Issue of Clinical Ophthalmology 42015 Regulations on Pharmaceutical International Multi-Center Clinical Trials in China 2China Nepstar Chain Drugstore Ltd. Announces Management Change and New Director Appointment 2China Nepstar Chain Drugstore Ltd. Announces Management Change and New Director Appointment 3
... Dec. 16, 2011  Ampio Pharmaceuticals, Inc. (Nasdaq: ... discovers and develops new uses for previously approved drugs ... to recent publications about the Company by anonymous short ... its common stock is a result of factually inaccurate ...
... 16, 2011 Eli Lilly and Company (NYSE: ... Thursday, January 5, 2012 and, separately, will announce its financial ... on Tuesday, January 31, 2012.  On each day, Lilly will ... to further detail the company,s 2012 financial guidance and its ...
Cached Medicine Technology:Ampio Responds to Recent Publications by Anonymous Short Sellers 2
... product, the Super Premium ALPHA 10 ... exceptional versatility in an intuitive and ... is the ideal system for Perinatology/Maternal ... offices, Surgical Applications, Breast Imaging, and ...
... Human Growth Hormone (hGH; somatotropin) is a 22 ... secreted by cells of the anterior pituitary. The ... best characterized of five members of a gene ... measure the expression of hGH released into the ...
... sulfate ester of DHEA, derived from sulfated ... in adrenal and extradrenal tissues. DHEA is ... adrenal cortex, and is a precursor for ... weak androgenic activity, which for unsulfated DHEA ...
... Dehydroepiandrosterone sulfate (DHEA-S) is the sulfate ester ... by enzymatic conversion of DHEA in adrenal ... C19 steroid secreted by the adrenal cortex, ... estrogen biosynthesis. DHEA possesses relatively weak androgenic ...
Medicine Products: