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

placed a contact lens that completely blocked light over one of their eyes. Keeping one eye shut and one open, called monocular deprivation, is a standard method scientists use to study use-dependent plasticity of visual development.

The hamsters then grew up in a light-dark cycle such that only the non-deprived eye was able to send light information into the brain. In adulthood, the lenses were removed, and the function of the hamsters' previously deprived eye was assessed. The researchers found that the hamsters' brains were blind to all classical visual stimuli presented to the deprived eye, such as food or moving stimuli.

Nevertheless, the deprived eye perfectly retained the hamsters' ability to synchronize their circadian rhythms of activity with the 24-hour day. Thus, even though the hamsters could not see objects with the deprived eye, they could use input from the eye to set their internal clocks. The study also showed that long-term monocular deprivation did not affect anatomical projections from the eye to the circadian clock in the brain, and light-induced changes in gene expression in the circadian clock were also normal.

"It's interesting to see how some aspects of behavioral development are hard-wired and develop into adult-typical patterns, even in the total absence of normal environmental input to the system," Prendergast said.


'/>"/>

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)... genus Axinaea belongs to the large, mainly tropical ... ca. 5000 species in the family rely on bees for ... by other insects or vertebrates. The flowers of Axinaea ... flowers and the petals of the different species are pink, ... out based on the contrasting colours of their bulbous appendages. ...
(Date:7/10/2014)... Imagine the open ocean as a microbial megacity, teeming ... drop of water, hundreds of types of bacteria can ... of these ocean microbes have their own daily cyclesnot ... to wake up, commute, work, and eat at the ... sun. Light-loving photoautotrophsbacteria that need solar energy to help ...
(Date:7/10/2014)... company housed at NJIT,s business incubator, received a $1.4 ... surgeons will use to staunch bleeding during brain surgery. ... site, and the natural bio-polymer solutions in the gel ... 30 seconds. , The gel can shorten an ... into less time for the patient,s skull to be ...
Breaking Biology News(10 mins):Novel type of bird pollination mechanism discovered in South America 2New research finds ocean's most abundant organisms have clear daily cycles 2New research finds ocean's most abundant organisms have clear daily cycles 3A start-up at NJIT develops bleeding-control gel for brain surgery 2
... you ever met a cat that doesn't go crazy over ... the world don't respond to it at all, according to ... of Chemical & Engineering News, the weekly newsmagazine published by ... Catnip sensitivity is inherited, says Carolyn M. McDaniel, a veterinarian ...
... Florida researchers say they are a step closer to ... cancers before symptoms become apparent. , The findings, currently ... Sciences, involve introducing molecularly engineered strands of DNA into ... burst after they adhere to cancer proteins. , ...
... the gene responsible for controlling a first key step in ... in the journal Nature tomorrow (Thursday 27 October 2005). , ... take place once a sperm enters an egg, giving it ... reproducing animals. , The absence or mutation of this gene ...
Cached Biology News:Many cats unaffected by catnip, C&EN reports 2Scientists closer to new cancer detection method 2Scientists closer to new cancer detection method 3Scientists unpick genetics of first 15 minutes of life 2
(Date:7/10/2014)... for crude 3-D glasses, polarized glasses, and shutter ... devices, used to trick the brain into perceiving ... obsolete with the introduction of new holography technology ... doctoral students Yuval Yifat, Michal Eitan, and Zeev ... nanoantennas that could be used for security as ...
(Date:1/15/2014)... an approach akin to assembling a club sandwich ... Technology (NIST) researchers have succeeded in crafting a ... flammability of foam commonly used in upholstered furniture ... the nanotube-coated polyurethane foam was reduced 35 percent ...
(Date:1/15/2014)... 2014 The Pittcon Organizing Committee is pleased ... Safety Tech , an e-Journal and producer of ... the second year for the co-location of Food Labs Conference ... provides that the registration fee to attend the two-day Food ...
(Date:1/15/2014)... January 15, 2014 Cynvenio, a cancer ... through the genomic analysis of tumor cells in the ... a web-based cancer decision support application powered by CollabRx, ... Cynvenio’s ClearID™ genomic test, Therapy Finder will provide breast ...
Breaking Biology Technology:Projecting a 3-dimensional future 2Projecting a 3-dimensional future 3Layered security: Carbon nanotubes promise improved flame-resistant coating 2Pittcon Announces Second Year Partnership With Food Safety Tech 2Pittcon Announces Second Year Partnership With Food Safety Tech 3Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 3
... - Oncothyreon Inc. (Nasdaq: ONTY ) (TSX:ONY), ... therapeutic products for the treatment of cancer, today announced ... year end 2009 financial results on Wednesday, August 12, ... markets. Following the release, Oncothyreon,s management expects to discuss ...
... HARBIN, China, Aug. 6 /PRNewswire-Asia-FirstCall/ -- ... "the Company") (Nasdaq: CSKI ), a leading,fully ... of China ("PRC"), today announced the appointment of Mr.,William ... Board of Directors,("the Board") effective August 4, 2009. Mr. ...
... /PRNewswire-FirstCall/ - AEterna Zentaris Inc. (NASDAQ: AEZS ... endocrine therapy and oncology, today announced that its President ... overview at the upcoming Canaccord Adams 29th Annual Global ... p.m. (eastern time) at the Intercontinental Hotel in Boston. ...
Cached Biology Technology:China Sky One Medical, Inc. Appoints New Independent Director 2China Sky One Medical, Inc. Appoints New Independent Director 3
Collected from 8-12 week old New Zealand or Californian rabbits. Aseptically collected and processed to minimize hemolytic activity. Pricing: $60/unit for 1 - 10 units...
Donor Goat Serum...
GeneRacer is an advanced RACE (rapid amplification of cDNA ends) technique that improves the efficiency of amplifying full-length 5' and 3' cDNA ends. With the GeneRacer Kit you can:...
One-step, microplate or cuvet, colorimetric, linear detection range 0.7 mg/dL to 35 mg/dL. Procedure: 5 min....
Biology Products: