Navigation Links
Some short-term memories die suddenly, no fading
Date:4/29/2009

The human brain stores some kinds of memories for a lifetime. But when our eyes are open and looking at things, our gray matter also creates temporary memories that help us process complex tasks during the few seconds these visual memories exist. For decades, scientists have held that such short-term memories don't suddenly disappear, but grow gradually more imprecise over the course of several seconds.

Now researchers at the University of California, Davis, have found just the opposite. Their subjects retained temporary memories of an object's color or shape for at least four seconds. After that, the memories began to wink out like streetlights at daybreak, remaining quite accurate until they suddenly disappeared.

To test the accuracy of short-term visual memory, Weiwei Zhang, a postdoctoral scholar, and Steve Luck, a professor of psychology, both at the UC Davis Center for Mind and Brain, devised a pair of tests, both of which could separately measure two things: the accuracy of a short-term memory and the probability that the memory still existed. Each test was given to 12 adults.

In the first test, three squares each with a different color fill flashed for a tenth of a second on a computer screen. After an interval of one, four or 10 seconds a wheel showing the entire spectrum of colors appeared on the screen. The three squares also reappeared, only now they were colorless and one of them was highlighted. Subjects were asked to recall the color of the highlighted square and click on the area of the wheel that most closely matched it. Each subject repeated this test 150 times for each of the three memory retention intervals.

When subjects retained a memory of the color, they clicked very close to it on the wheel the distance between the click and the actual color indicating the accuracy of the memory. When color had disappeared from memory, however, subjects clicked at random on the wheel.

The second test w
'/>"/>

Contact: Liese Greensfelder
lgreensfelder@ucdavis.edu
530-752-6101
University of California - Davis
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Living fossils have long- and short-term memory
2. Memory molecule stores memories in neocortex
3. Tracking feline memories on the move
4. Genetic tags reveal secrets of memories staying power in mice
5. CSHL scientists identify a mechanism that helps fruit flies lock-in memories
6. Scientists find elephant memories may hold key to survival
7. Erasing drug-associated memories may stop drug addiction relapses
8. Emotion and scent create lasting memories -- even in a sleeping brain
9. SUNY Downstate researchers find that memory storage molecule preserves complex memories
10. Mollusks taste memories to build shells
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Some short-term memories die suddenly, no fading
(Date:5/11/2015)... May 11, 2015 Curemark LLC, a privately ... of a new Phase III double blind, randomized, placebo-controlled ... formulation, CM-AT, on all children ages 3-8 with Autism. ... Phase III double blinded clinical trial for CM-AT in ... of the digestive enzyme chymotrypsin. This new trial will ...
(Date:5/6/2015)... TEL AVIV, Israel , May 6, 2015 /PRNewswire/ ... the world,s most established helmet producer, announced today that ... LifeBEAM Smart Helmet, the world,s first bio-sensing cycling helmet ... will be released in two new colors in order ... demand for the product. In addition, LifeBEAM and Lazer ...
(Date:4/27/2015)... Profile Solutions, Inc. (OTC: PSIQ), a leading ... pleased to announce that Dr Gerry Bedore ... of its scientific advisory board. ... leader in technology-enhanced learning models. He was a co-founder ... studies and books focused on online student success and ...
Breaking Biology News(10 mins):Curemark, LLC, Launches New Phase III Trial in Expanded Population of Children with Autism 2LifeBEAM and Lazer Announce Expanded Partnership in Bio-Sensing Sports Gear 2LifeBEAM and Lazer Announce Expanded Partnership in Bio-Sensing Sports Gear 3Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 2Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 3Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 4
... of the patients who received injections of steroids contaminated ... Compounding Center has found that some patients had fungal ... of their symptoms and that magnetic resonance imaging (MRI) ... received injections from highly contaminated lots. The ...
... extremely disappointed that the European Chemicals Agency (ECHA) Board ... Benelux B.V.to conduct a pre-natal developmental toxicity study in ... expose pregnant rats and their unborn pups to the ... to comply with the European Community,s Regulation on the ...
... are threatened with extinction as a result of rising human ... Ohio State University in the US. Their work is also ... human population will continue to pose a threat to other ... a threshold above which population growth would cease to have ...
Cached Biology News:Evolution of an outbreak: Complications from contaminated steroid injections 2Are we pushing animals over the edge? 2
(Date:5/28/2015)... 27, 2015 Research and Markets( http://www.researchandmarkets.com/research/6cg3zw/cell_therapy ... new report "Cell Therapy - Technologies, Markets ... This report describes and evaluates cell therapy technologies ... an important role in the practice of medicine. ... fashioned bone marrow transplants. Role of cells in ...
(Date:5/28/2015)... 28, 2015 DryLet, LLC a ... applications such as animal waste reduction, bioremediation, wastewater ... in wastewater treatment plants and restaurant kitchen settings, ... Pork Expo, June 3-5 in Des Moines, Iowa. ... a Wall Street Journal article because of its ...
(Date:5/28/2015)... , May 28, 2015  GenVec, Inc. (Nasdaq: ... CEO, Douglas J. Swirsky , will present a ... at 11 a.m. EDT on Thursday, June 4, 2015. ... Mr. Swirsky,s presentation will be available at the following ... available on GenVec,s website.  To access, visit www.genvec.com ...
(Date:5/28/2015)... Minneapolis, MN (PRWEB) May 28, 2015 ... makes it a point to ask his audiences ... of future trends including robotics, solar cells, fuel ... sequencing, 3D printers, advanced battery storage technology, driverless ... assistants, and high-quality but inexpensive online education. ...
Breaking Biology Technology:Global Cell Therapy Market 2015-2020 - Technologies, Markets and Companies 2DryLet to Showcase Patented ManureMagicâ„¢ at the 2015 World Pork Expo, June 3-5 in Des Moines, Iowa 2GenVec To Present At The Jefferies Healthcare Conference 2Futurist Jack Uldrich to Deliver 4 Keynote Addresses in June 2
... Corporation,(Nasdaq: CRVL ), a leading provider of ... over 150,000 facility and,provider locations to its national ... new provider network additions are the,result of a ... St. Petersburg, FL. With more than 5,500 ...
... The following statement,was issued today by the law firm of ... that a class action lawsuit was filed in the,United States ... of,all purchasers of securities of LCA-Vision, Inc. (Nasdaq: LCAV ... 30, 2007, inclusive (the,"Class Period"). If you wish to ...
... AviaraDx announced today that,the company,s Carlsbad, CA, ... Pathology (CAP) accreditation. The laboratory offers,two new molecular ... States. CancerTYPE ID(TM) is a 92-gene expression ... ID(TM) provides a molecular classification of metastatic,cancer and ...
Cached Biology Technology:CorVel Corporation Medical Provider Network Adds New Providers to Increase Savings and Improve Access to Care 2CorVel Corporation Medical Provider Network Adds New Providers to Increase Savings and Improve Access to Care 3Shareholder Class Action Filed Against LCA-Vision, Inc. by the Law Firm of Schiffrin Barroway Topaz & Kessler, LLP 2Shareholder Class Action Filed Against LCA-Vision, Inc. by the Law Firm of Schiffrin Barroway Topaz & Kessler, LLP 3AviaraDx Announces CAP Accreditation of Its Laboratory Operations 2
...
...
...
... submicron range are part of your production ... of particle size is important to you. ... detect the component populations in your sample ... Analyzer uses Photon Correlation Spectroscopy (PCS) , ...
Biology Products: