Navigation Links
From the beginning, the brain knows the difference between night and day
Date:4/28/2011

The brain is apparently programmed from birth to develop the ability to determine sunrise and sunset, new research on circadian rhythms at the University of Chicago shows.

The research sheds new light on brain plasticity and may explain some basic human behaviors, according to Brian Prendergast, associate professor in psychology at the University of Chicago and co-author of a paper published April 27 in the journal PLoS One. The lead author is August Kampf-Lassin, an advanced graduate student at the University.

"This finding may show us why infants of many species eventually learn to discriminate daytime from nighttime," said Prendergast, a researcher on biological rhythms.

In a series of experiments, researchers were able to show that although the ability to see visual stimuli, such as movement, is lost when a developing eye is not exposed to light, the ability to determine light and dark cycles was not affected. The ability to make that distinction between night and day develops as an animal grows, they found.

Other research has found that primates as well as humans adapt naturally to a rhythm of sleeping during the night. But this research shows that the pathway in the circadian system that allows synchrony between the brain and day-night rhythms in the environment is probably an innate feature of development, he said.

"For the first time, we have established that the ability to coordinate circadian rhythms with daily changes in light exposure is not subject to very much plasticity at all that it is not influenced by changes in the amount of light the brain receives during development," Kampf-Lassin said.

The results of the study are reported in the article "Experience-Independent Development of the Hamster Circadian Visual System," which was drawn from a series of challenging experiments with hamsters.

Shortly after the hamsters' eyes opened, but before they were exposed to light, experimenters
'/>"/>

Contact: William Harms
w-harms@uchicago.edu
773-702-8356
University of Chicago
Source:Eurekalert

Page: 1 2

Related biology news :

1. Shielding body protects brain from shell shocking blast injuries
2. Brain cell migration during normal development may offer insight on how cancer cells spread
3. USC research shows critical role of placenta in brain development
4. Evolution of human super-brain tied to development of bipedalism, tool-making
5. Toward new medications for chronic brain diseases
6. FDA approves the NovoTTF-100A system for the treatment of patients with recurrent glioblastoma multiforme (GBM) brain tumors
7. Giant fire-bellied toads brain brims with powerful germ-fighters
8. Allen Institute for Brain Science announces first comprehensive gene map of the human brain
9. Alcohol helps the brain remember, says new study
10. Mapping the brain: New technique poised to untangle the complexity of the brain
11. Dopamine controls formation of new brain cells
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/10/2014)... July 2, 2014  Unisys Corporation,s (NYSE: UIS ... Nederland N.V., today announced that it has been selected by ... manage a new Basic Provision Biometrics solution for penitentiaries across ... won the contract with a solution based on its open ... term of the contract is up to seven years, with ...
(Date:7/10/2014)... SHELTON, Conn. , July 2, 2014 NXT-ID, Inc., ... market, reports that CEO Mr. Gino Pereira was ... radio show in Tampa Florida . Mr. ... radio host Cedric Harris and how the Wocket™ ... secure alternative.  Cedric Harris tells ...
(Date:7/10/2014)... July 3, 2014 Research and Markets ... the "Global Gesture Recognition & Touch-Less Sensing ... to 2020" report to their offering ... Gesture Recognition & Touch-Less Sensing Market to Grow ... a while, but the companies were unable to ...
Breaking Biology News(10 mins):Unisys Delivers New Basic Provision Biometrics Solution to Dutch Custodial Institutions Service 2Unisys Delivers New Basic Provision Biometrics Solution to Dutch Custodial Institutions Service 3Security and Your Money: Tampa Bay Radio Host Cedric Harris Talks to NXT-ID CEO Mr. Gino Pereira about the Wocket Smart Wallet 2Security and Your Money: Tampa Bay Radio Host Cedric Harris Talks to NXT-ID CEO Mr. Gino Pereira about the Wocket Smart Wallet 3Security and Your Money: Tampa Bay Radio Host Cedric Harris Talks to NXT-ID CEO Mr. Gino Pereira about the Wocket Smart Wallet 4Global Gesture Recognition & Touch-Less Sensing (2D, 3D, Ultrasonic, IR, Capacitive) Market - Forecasts to 2020 2
... Mich.---A new synthetic Petri dish coating could overcome a ... cell research, say University of Michigan researchers. Under ... yielding human therapies because the cells have been grown ... "These nondefined, animal-based components create issues with the ...
... economic stimulus program (ARRA) Health Information Technology for Economic ... of health information technology (HIT) and to ready a ... members of the American Medical Informatics Association (AMIA), a ... has advocated for informatics as a health care specialty. ...
... Troy, N.Y. Patrick Underhill, assistant professor in ... Rensselaer Polytechnic Institute, has won a prestigious Faculty ... Science Foundation (NSF). Underhill will use ... into how transport phenomena affect biological processes. He ...
Cached Biology News:New culture dish could advance human embryonic stem cell research 2AMIA Members Manage HITECH Stimulus Grant Awards 2Rensselaer Polytechnic Institute professor Patrick Underhill receives NSF CAREER award 2
(Date:7/11/2014)... -- , Not for release, publication or distribution ... jurisdiction where to do so would constitute a violation of ... ("Shire" or the "Company") (LSE: SHP, NASDAQ: SHPG ... has held a meeting with representatives of AbbVie. ... agreement or approval of AbbVie. A further update ...
(Date:7/11/2014)... , July 11, 2014  Researchers have ... three-dimensional images. The new technology, called Virtual Finger, ... small structures like neurons and synapses using the ... unique technology makes 3D imaging studies orders of ... at an unprecedented level across many areas of ...
(Date:7/10/2014)... Understanding the need for better quality ... the gap that currently exists in this area, ChanTest ... portfolio of validated ion channel and GPCR cell lines. ... as ion channels control many critical physiological functions throughout ... the potential to treat a variety of human diseases. ...
(Date:7/10/2014)... 10, 2014 EvoDerma ’s NOOME Anti-Aging ... rejuvenating device now comes with a second treatment cup to ... , The new cup is thinner on the edges for ... target rough, thin and uneven surfaces on the face, neck ... a stimulating treatment on areas such as the cheeks and ...
Breaking Biology Technology:Shire plc - Statement re: Media Speculation 2Virtual Finger Enables Scientists To Navigate And Analyze 3D Images Of Complex Biological Structures 2Virtual Finger Enables Scientists To Navigate And Analyze 3D Images Of Complex Biological Structures 3Leader in Ion Channel Research Announces Newly Validated and Re-Engineered Cells 2Leader in Ion Channel Research Announces Newly Validated and Re-Engineered Cells 3Introducing a New Bonus Treatment Cup for EvoDerma’s NOOME Anti-Aging Motion 2
... venture investors have fewer secrets these days, and they ... early-stage executives during the National SBIR-STTR Conference. , ,In ... the University of Wisconsin-Madison , they counseled technology ... sustainable market advantage, and what each round of funding ...
... - Quintessence Biosciences , a biopharmaceutical company ... its EVade cancer treatments, has been selected for preclinical ... that pending a favorable preclinical safety assessment, it would ... an investigational new drug application in late 2007, ...
... Milwaukee, Wis. - The University of Wisconsin-Milwaukee ... for its incorporation of a content storage and collaboration ... , ,The PantherFile system, powered by Xythos Software ... 100, a group of organizations that invest in innovative ...
Cached Biology Technology:Early-stage executives hear from investors 2Early-stage executives hear from investors 3
... Automatic grid, subgrid and spot finding overcome tedious spot, ... template assignment , ... options to optimize, ... Characterize more precisely through grouping by cells, grids, ...
... DNA Gel Stain combo offers these benefits: ... products separately Offers a ... Eliminates risks to yourself, the environment ... from 100 bp to >30 kb. UltraPure Agarose is ...
... The Sub-Plates are E.Coli glycerol stocks ... well contains 50 cDNA clones with approximately ... of the a master plate well, the ... 96-well PCR to identify the positive well(s). ...
... liter of urine will give a positive reaction ... ,Certification: The Donors are of US origin ... NEGATIVE for HbsAg, HCV, HIV-1 & 2, Syphilis ... THIS MATERIAL IS SOLD FOR IN-VITRO DIAGNOSTIC USE ...
Biology Products: