Navigation Links
Using brain scans, researchers find evidence for a two-stage model of human perceptual learning

Using advanced brain imaging techniques, researchers at Georgetown University Medical Center have watched how humans use both lower and higher brain processes to learn novel tasks, an advance they say may help speed up the teaching of new skills as well as offer strategies to retrain people with perceptual deficits due to autism.

In the March 15 issue of Neuron, the research team provides the first human evidence for a two-stage model of how a person learns to place objects into categories ?discerning, for example, that a green apple, and not a green tennis ball, belongs to "food." They describe it as a complex interplay between neurons that process stimulus shape ("bottom-up") and more sophisticated brain areas that discriminate between these shapes to categorize and "label" that information ("top-down").

A human can't function without the ability to sort between objects and organize them in fluid ways, said the study's lead author, Maximilian Riesenhuber, Ph.D., the principal investigator for the Laboratory for Computational Cognitive Neuroscience. "We make sense of the world by learning to recognize objects as members of categories such as 'food,' 'friend,' or 'foe,' but it has not been clear how the human brain does this," he said.

The researchers theorized that a very simple yet efficient way of doing this kind of learning would be for the brain to first learn how objects vary in shape, and then, in a second stage, to learn which shapes go with which labels, allowing the brain to sort an object into different labeled "bins" when necessary. For example, a green apple and a green tennis ball are both green and round, but only an apple can be eaten and only a green tennis ball belongs to a sport.

In this study, the research team asked human volunteers to undertake a series of tasks presented to them on a computer screen. All of them involved cars that were generated with a computer graphics morphing system, allowing
'"/>

Source:Georgetown University Medical Center


Page: 1 2 3

Related biology news :

1. Research Using Mouse Models Reveals A Novel Key Player In The Initiation Of Colon Cancer
2. Rush Physicians Using Gene Therapy For Heart Patients With Moderate To Severe Chest Pains Who Do Not Benefit From Other Treatments
3. Researchers Closer To Helping Hearing-Impaired Using Stem Cells
4. Using nanoparticles, in vivo gene therapy activates brain stem cells
5. Using computers and DNA to count bacteria
6. Using the genomic shortcut to predict bacterial behavior
7. Using natures most primitive anti-viral defense system to find new approaches to cancer research
8. Using dental X-rays to detect osteoporosis
9. Using nanomagnets to enhance medical imaging
10. Controversial drug shown to act on brain protein to cut alcohol use
11. Mouse brain cells rapidly recover after Alzheimers plaques are cleared
Post Your Comments:
(Date:4/17/2014)... If a restaurant ... he can expect his premises to be trashed. Warnings like ... is enough to make restaurant owners pay up. Similarly, mafia-like ... in other birds, nests. If the host birds throw the ... destroying the entire nest. Consequently, it is beneficial for hosts ...
(Date:4/17/2014)... Ongoing deforestation and fragmentation of forests in the ... remnant forests, contributing to rapid and widespread forest ... of researchers., The findings show that forests in ... severe droughts coupled with forest fires lead to ... said Jennifer Balch, assistant professor of geography, Penn ...
(Date:4/17/2014)... such as heart disease, epilepsy and pain, making them ... is still much scientists do not know about the ... into the structure of sodium channels and, specifically, one ... responsible for ,fine-tuning, the activity of the channel. The ... the Journal of Biological Chemistry . , Nerves ...
Breaking Biology News(10 mins):Fear of the cuckoo mafia 2Fear of the cuckoo mafia 3Drought and fire in the Amazon lead to sharp increases in forest tree mortality 2Drought and fire in the Amazon lead to sharp increases in forest tree mortality 3Structure of sodium channels different than previously believed 2
... acne (Propionibacterium acnes) will be the topic of the Denver ... University. As well as acne, this bacterium is responsible for ... diagnosis. Why are we not more aware of this versatile ... and boost the immune system: , Probiotics can ...
... Most college students in the United States do ... an essential skill in understanding the causes and ... the January issue of BioScience . The ... from Michigan State University, calls for a new way ...
... Scientists at Rothamsted Research, United Kingdom, in collaboration with ... Areas (ICARDA), Syria have developed a method of accounting ... trend refers to the variations in crop yield and ... trial. Usually plant breeders will grow several replicate ...
Cached Biology News:Probiotics, prebiotics and biofuel-producing bacteria 2College students lack scientific literacy, study finds 2
(Date:1/15/2014)... TaiGen Biotechnology Company, Limited ("TaiGen") today announced that ... leading Russian pharmaceutical company, to develop and commercialize nemonoxacin ... , Turkey and other ... novel antibiotic for the treatment of bacterial infections including ...
(Date:1/14/2014)... BURLINGAME, Calif. , Jan. 14, 2014 As pet owners ... no doubt many of them wrote: "Take better care of my ... and even designer clothes and top-brand carrying cases to take the ... Pet parents might also feel compelled to buy some pricey toys ...
(Date:1/14/2014)... In recent years, growing suspicion about the pharmaceutical ... and promotion has led to unprecedented levels of public ... about the insidious impact of commercialization of research, has ... the world’s biggest pharmas for illegal marketing activities, allegations ...
(Date:1/14/2014)... CA (PRWEB) January 14, 2014 Kerr Corporation, ... 10-minute video and additional how-to information about dual arch impressions ... Restorations with Dual Arch Impressions,” the blog entry serves up ... technique and houses a step-by-step demonstration by Dr. David Little ...
Breaking Biology Technology:TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 2TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 4New Year's Resolution: Give Pets the Gift of Top-Notch Health Care 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 3
... May 14 Sigma-Aldrich (Nasdaq:,SIAL) announced today that Chief ... retire at a date to be determined this,summer. Hogan, ... early this,year of his desire to retire as soon ... Company has initiated a search to,identify a successor from ...
... to be Caused by Contaminated Blood Thinner, ... continues to,make headlines as more people are found ... the contaminated drug -- a group of which ... 2, 2008, another lawsuit,was filed against Chicago-area pharmaceutical ...
... Company Also Augments Senior Management Team with Recent Strategic Hires ... ... Puerto Rico, May 14 Triple-S,Management Corporation (NYSE: GTS ) today ... principal investigator for the Children,s Oncology Group and,the Dana Farber Acute Lymphoblastic ...
Cached Biology Technology:Sigma-Aldrich (Nasdaq: SIAL) CAO & CFO Hogan Plans to Retire; Search for Successor Underway 2Illinois Pharmaceutical Manufacturer Sued for Injuries to Kentucky Resident 2Illinois Pharmaceutical Manufacturer Sued for Injuries to Kentucky Resident 3Triple-S Management Corporation Appoints New Non-Executive Chairman to Board; Adds New Director 2
Human plasmacytoid dendritic cells, BDCA-4+, For immunohistochemistry (IHC) Cell Chip with Human Peripheral Blood Dendritic Cells and EPCs...
Umbilical cord blood CD19+ B cells, For immunohistochemistry (IHC) Cell Chip with Human Umbilical Cord Blood Monocytes, B Cells and NK Cells...
Umbilical cord blood CD4+ T cells, For immunohistochemistry (IHC) Cell Chip with Human Umbilical Cord Blood MNCs and T Cells...
Human peripheral blood CD56+ NK cells, For immunohistochemistry (IHC) Cell Chip with Human Peripheral Blood Monocytes, B Cells, NK Cells and Stem Cells...
Biology Products: