Navigation Links
Mouse vision has a rhythm all its own
Date:8/24/2007

In the eyes of mammals, visual information is processed on a daily schedule set within the eyes themselvesnot one dictated by the brain, according to a new report in the August 24 issue of the journal Cell, a publication of Cell Press. The researchers found in mice that the eyes normal rhythmic response to light requires only that a molecular "clock" inside the retina go on ticking. The retina is a layer of nerve tissue covering the back of the eyeball, which is often likened to the film in a camera; without it, images can't be captured.

The results offer the first glimpse into the physiological importance of circadian clocks found in organs throughout the body, said Charles Weitz of Harvard Medical School. The retina's apparent independence when it comes to keeping itself on time further challenges the notion that the circadian rhythms of the bodywhich drive regular patterns of physiology and behaviorstrictly follow orders handed down from a "master clock" in the brain, the researchers said.

"We're moving from a dictatorial model of the circadian system to a federal model," Weitz said. He added, however, that the brain's master clock isnt "completely off its pedestal" yet as it might still play a lead role in synchronizing the clocks found in other organs.

It has long been known that the roughly 24 hour circadian clock controlling behavior in mammals is located in the brains suprachiasmatic nucleus (SCN), Weitz explained. Even when animals are placed under conditions of constant darkness, that daily rhythm marches on.

More recently, researchers have discovered that circadian clocks are also distributed in other mammalian tissues, including the retina, multiple brain regions, and many peripheral tissues such as the liver and kidneys. But while scientists had suspected physiological functions for those many timepieces, few studies had addressed the issue.

In the new study, the researchers found that retinas of mice th
'/>"/>

Contact: Nancy Wampler
nwampler@cell.com
617-386-2121
Cell Press
Source:Eurekalert

0

GOOD

Page: 1 2

Related medicine news :

1. Mouse Allergen Found In Homes Could Trigger Asthma In Kids
2. Researchers Develop Mouse Model Of Brain Tumor
3. German Scientists Create Stem Cells From Mouse Testes
4. Mouse Models To Determine The Cause Of Aggressive Leukemia
5. Mouse Model Beneficial to Study of Head and Neck Cancer
6. Scientists Discover New RNAs in Mouse Testicles
7. Scientists Isolate Leukemia Stem Cells in Mouse Model
8. Mouse Model Demonstrates Immune System Reaction In Chlamydia Infection
9. Mouse Gene With Gene Stutter Will Help Leukemia Research
10. Mouse Study Suggests Anxiety Disorders Take Root in Infancy
11. Rett Syndrome Reversed in Genetic Mouse Model
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/20/2013)... 2013 On May 14th, premiere Atlanta ... about how one of its patients originally came to ... being diagnosed with giant papillary conjunctivitis. “Giant papillary conjunctivitis ... eye, and for one of our patients in particular, ... says the Medical Director of the Atlanta Vision Institute ...
(Date:5/20/2013)... 20, 2013 iGearUnlimited.com asked schools' technology directors ... for students. The answers didn't surprise anyone: , 1. A ... and abuse, 2. Not too bulky – need to fit ... Built-in kick-stand that works in both vertical and horizontal orientations, ... trackable barcodes on each case, 5. Customizable – schools love ...
(Date:5/20/2013)... May 20, 2013 Widely regarded as ... genital plastic surgery and women’s sexual health, Dr. Goodman ... Board of http://www.labiaplastysurgeon.com , the nationally ranked ... proud to be a member of this informative and ... the appointment. “I’ve already worked with the President ...
(Date:5/20/2013)... (PRWEB) May 20, 2013 Milpitas, ... an industry leader in enterprise-class information archiving, eDiscovery ... eDiscovery Platform 7.0, the latest release in the ... facets of the legal discovery lifecycle. MessageSolution will ... Los Angeles CA. , As the first stop ...
(Date:5/20/2013)... AURORA, Colo. (PRWEB) May 20, 2013 ... University, a leading online accredited university, has developed a ... to help nurses assess how they feel about continuing ... BSN. Nurses can print out the complimentary worksheet, respond ... to see how they rate on a BSN-readiness scale. ...
Breaking Medicine News(10 mins):Health News:Atlanta LASIK Practice Publishes a Patient’s Testimonial About Allergy to Contact Lenses 2Health News:New Rugged iPad Case for Bretford Charging Cart Saves the Day for School Deployments 2Health News:New Rugged iPad Case for Bretford Charging Cart Saves the Day for School Deployments 3Health News:Globally Respected Feminine Cosmetic Genital Surgeon Joins Board of Industry Leading Labiaplasty Medical Website 2Health News:Globally Respected Feminine Cosmetic Genital Surgeon Joins Board of Industry Leading Labiaplasty Medical Website 3Health News:MessageSolution Releases Enterprise eDiscovery Platform 7.0 at LegalTech 2013 West Coast Expo 2Health News:MessageSolution Releases Enterprise eDiscovery Platform 7.0 at LegalTech 2013 West Coast Expo 3Health News:MessageSolution Releases Enterprise eDiscovery Platform 7.0 at LegalTech 2013 West Coast Expo 4Health News:American Sentinel University Develops New Worksheet to Help Nurses Determine BSN-Readiness 2Health News:American Sentinel University Develops New Worksheet to Help Nurses Determine BSN-Readiness 3
... the sea-bed for abalone are paying with their lives. Four ... abalone, which is used in sushi// and a variety of ... on the black market. ,Abalone are a special ... is considered a delicacy in certain parts of Latin America ...
... of water to keep oneself cool may not be a ... warns scientists for marathon runners//. ,With today's temperatures ... lose almost a litre of sweat every hour and reach ... normal. The sporting community has long assumed that drinking large ...
... Parkinson's sufferers are usually treated with the drug called ... After prolonged use of the drug, many patients may ... drug. ,Parkinson's disease is a slow process ... dopamine levels fall, the symptoms of Parkinson’s shows up ...
... the possible reasons for them, a survey was conducted ... that present statistics of stillborns remained unchanged upon comparison ... in 200 pregnancies resulted in stillbirth, the survey showed. ... (CEMACH) revealed that there were 3,600 stillbirths ...
... to eat more by seeing the food ads on television, ... children// are more vulnerable to it. ,Researchers ... on Obesity in Budapest, said they exposed a group of ... series of food and toy adverts on television, followed by ...
... planning to build the world's first "green" skyscraper that ... part of the// emirate's efforts to remain an international ... skyscraper will feature revolving floors with the entire building ... will make it independent of outside energy sources, according ...
Cached Medicine News:Health News:Hunt for Sea Delicacy Taking a Toll in California 2Health News:Hunt for Sea Delicacy Taking a Toll in California 3Health News:Large Fluid Intake Won’t Help to Keep Cool for Marathon Runner 2Health News:Stillbirth Figures Stand Still 2Health News:Food Ads Prompts Children to Eat More 2
(Date:5/17/2013)...  Sorrento Therapeutics, Inc. (OTCBB: SRNE; or STI) ... Business Technology Transfer Research (STTR) grant (#1R42AI098182-02) from ... (NIAID), a division of the National Institutes of ... antibody therapeutics to combat Staphylococcus aureus ... methicillin-resistant S. aureus (MRSA), was renewed ...
(Date:5/17/2013)... 17, 2013   Shareholder rights attorneys  at Robbins ... Inc. (NASDAQGS: AVEO) securities has filed a complaint in ... Massachusetts .  The complaint alleges that Aveo ... Act of 1934 (the "Exchange Act") between January 3, ... (Logo: http://photos.prnewswire.com/prnh/20130103/MM36754LOGO ) ...
(Date:5/17/2013)... YORK , May 17, 2013 /PRNewswire-iReach/ -- United ... Advanced Cardiac Life Support (ACLS), Pediatric Advanced Life Support ... free PALS, BLS and ACLS online course ... manuals, people simply need to build an account with ... materials for these programs, United Medical Education is setting ...
Breaking Medicine Technology:Sorrento Therapeutics, Inc. announces its approach to developing human antibody therapeutics against MRSA receives continued support from the National Institute of Allergy and Infectious Diseases 2Sorrento Therapeutics, Inc. announces its approach to developing human antibody therapeutics against MRSA receives continued support from the National Institute of Allergy and Infectious Diseases 3Sorrento Therapeutics, Inc. announces its approach to developing human antibody therapeutics against MRSA receives continued support from the National Institute of Allergy and Infectious Diseases 4Aveo Pharmaceuticals, Inc. Sued by Investor 2Aveo Pharmaceuticals, Inc. Sued by Investor 3ACLS Online Course Manuals are Now Available at No Cost through United Medical Education 2
... Trial Demonstrates Increased Dermal Penetration of TPM/Lidocaine Compared to ... MELBOURNE, Australia, Dec. 8 Phosphagenics Limited ("Phosphagenics") (ASX: ... a phase 1 clinical trial that examined the ability ... deliver the pain relief drug, lidocaine, safely into humans. ...
... SUPG ), a pharmaceutical company dedicated to the discovery ... PIM kinase inhibitor, SGI-1776, is effective both in vitro and in ... . This research was presented at the 50th Annual ... , In a poster presentation entitled " ...
Cached Medicine Technology:Positive Phase 1 Clinical Trial Results for Transdermal Lidocaine 2Positive Phase 1 Clinical Trial Results for Transdermal Lidocaine 3SuperGen's PIM Kinase Inhibitor, SGI-1776, Effective in Pre-Clinical Models of Acute Lymphoblastic Leukemia 2SuperGen's PIM Kinase Inhibitor, SGI-1776, Effective in Pre-Clinical Models of Acute Lymphoblastic Leukemia 3
... Class II Direct to High Res SSP kits provide ... single tray. Locus specific typing on a single tray ... Straight from genomic DNA to high resolution results, ... level typing with a single tray , Unique reaction ...
... Res SSP kits provide high resolution typing of the ... on a single tray reduces QC and testing costs ... to high resolution results, no need for initial low ... tray , Unique reaction pattern for most common alleles ...
... utilizes allele-specific primer combinations in the PCR ... that only primers whose sequence is completely ... converted by the polymerase into PCR products. ... product. Using the Biotest SSP Kit Systems, ...
... freezer is constructed with built-in bags as in ... bags are placed without contacting the ethylene glycol ... inserts. This device ensures easy handling and maximum ... bags so that the relatively hot air under ...
Medicine Products: