HOME >> BIOLOGY >> NEWS
Insight into the processes of 'positive' and 'negative' learners

Deciphering the subtle, complex electrical signals emanating from the brain has yielded important insights into the still-mysterious neural mechanisms that underlie behavior. By recording a subject's faint brain signals via arrays of scalp electrodes during cognitive tasks, researchers can extract "event-related potentials" (ERPs) that enable them to pinpoint with great accuracy when the brain reacts to components of the tasks.

One such intriguing ERP signal, called "error-related negativity" (ERN), is associated with activity in a brain area called the anterior cingulate cortex (ACC). The ACC is known to be activated during demanding cognitive tasks, and ERNs are typically more negative after participants make incorrect responses compared to correct choices. Researchers believe that the ERN reflects an abrupt dip in signaling between neurons that depend on the neurotransmitter dopamine. A key question, though, has been exactly what kind of processing ERNs reflect in the ACC. While one theory holds that ERNs reflect a mechanism by which the brain detects errors in decisions, another holds that it reflects the processing of conflicts, of which errors are just one case.

In an article in the August 18, 2005, issue of Neuron, researchers led by Michael J. Frank and colleagues at University of Colorado at Boulder offer new insight into the neural computational function represented by ERNs. They explored the processing underlying ERNs by wiring volunteers with scalp electrodes and measuring ERNs while the subjects were asked to pick between pairs of Japanese characters on a video screen. They used Japanese characters as symbols that would be meaningless to the volunteers and that could be randomly imbued by the researchers as being either a "correct" or "incorrect" choice. When asked to choose one symbol or the other, the correct choice was indicated by a smiley face and an incorrect choice by a red crossout symbol.

Thus, the researchers could prec
'"/>

Contact: Heidi Hardman
hhardman@cell.com
1-617-397-2879
Cell Press
17-Aug-2005


Page: 1 2 3

Related biology news :

1. Insights into osteosarcoma in cats and dogs may improve palliative care
2. Insight into evolution of adaptive immunity boosted by sea urchin genome sequencing
3. Insights into honey bee sex gene could bring sweet success in breeding
4. Insights into activity-dependent neuronal growth through RSRF-supported research
5. Symposium Environmental Change in Siberia -- Insights From Earth Observation and Modeling
6. Yale technology spins out varicose vein device company: Vascular Insights, LLC
7. Insight into our sight: A new view on the evolution of the eye lens
8. Insight into JAK/STAT
9. Insight into cell metabolism will help interpret PETs, MRIs
10. Insight into natural cholesterol control suggests novel cholesterol-lowering therapy
11. Insight into DNAs weakest links may yield clues to cancer biology

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/25/2019)... ... ... NDA Partners Chairman Carl Peck, MD , announced today that Tara Maddala, ... drug and genomic diagnostic products for therapeutic indications in oncology, has joined the firm ... as Vice President of Biometrics at GRAIL, Inc., where she built and led a ...
(Date:4/18/2019)... ... April 18, 2019 , ... Medpricer, the ... launch of mSource® AI Contract Text Analysis. This contract mining tool uses machine ... contracts, truly optimizing purchased services spend at record speed. It can analyze more ...
(Date:4/16/2019)... ... 16, 2019 , ... The Healthcare Technology Report is pleased ... extensive process was run to evaluate the hundreds of CEOs that lead exemplary ... other related areas. We gathered data on each nominee’s professional background and assessed ...
Breaking Biology News(10 mins):
(Date:5/8/2019)... POWAY, Calif. (PRWEB) , ... May 07, 2019 , ... Standing at 16.2 hands, Atlas ... busy too, participating in a drill team and barrel racing, among other activities. When ... suspensory ligament. He went from being a busy horse to only being able to ...
(Date:5/4/2019)... ... May 03, 2019 , ... Diopsys Inc, the ... ffERG/Photopic Negative Response vision test, a new full field electroretinography (ffERG) protocol ... that 6.3 million Americans will have glaucoma, with black Americans having the highest ...
(Date:5/2/2019)... ... 2019 , ... Stay on top of current hot topics through free webinars ... all webinars is free, so be sure to register today to save your place! ... to see our upcoming webinars: , CLINICAL TRIALS , May 7 – Oncology ...
(Date:4/25/2019)... ... April 23, 2019 , ... Frank is an albino, deaf Great Dane. His owners ... him due to his health issues. Despite his hearing impairment, he was always an active ... two would play all day, every day. As the two grew, playtime became rougher and ...
Breaking Biology Technology:
Cached News: