Navigation Links
Chemical Signaling Helps Regulate Sensory Map Formation In The Brain

Researchers at the University of Chicago have discovered an important mechanism used by the developing brain to design nerve connections in the section of the brain that interprets visual signals.//

In the process, they have hit upon the first experimental evidence for a decades-old model of how neurons establish distant connections in a way that can consistently relay spatial information.

The research paper is published in the January 5, 2006, issue of the journal Nature.

Here, the researchers show that a gradient of a molecule known as Wnt3 counterbalances another force provided by the EphrinB1-EphB signaling system. The balance between these two signaling systems, they show, is necessary to establish the carefully controlled pattern of nerve connections required to convey spatial information in the correct order from the eye to the brain.

This is the first biological validation of a computational model developed in the early 1980s which suggested that two such forces would be necessary to guide axons as they establish the connections that relay spatial information from one part of the nervous system to another, says Yimin Zou, Ph.D., assistant professor of neurobiology at the University of Chicago and author of the study.

Neurobiologists refer to this type of neuronal connection where the spatial order of neurons of one part of the nervous system is `copied’ onto another—as "topographic mapping." The term describes the creation of a coordinated connection that allows positional information from a grid of sensors, in this case the light-sensitive cells in the retina, to be smoothly and systematically transferred to their target, the structures in the brain that interpret information from the eyes. Without an orderly and faithful connection, information from the eyes could not be properly deciphered by the brain.

Similar topography systems are thought to regulate other sensory systems—such as hearing and tou
'"/>




Page: 1 2 3

Related medicine news :

1. Chemical in Gila monsters saliva yields Alzheimer drug
2. Chemical found in plants may be the treatment for leukemia
3. Chemicals in clear plastics can cause learning difficulties
4. Quitting Smoking Made Easy By Track Of New Chemical
5. Brain Chemical Identified For Drug Dependent Behavior
6. Block Immune System Chemical For Treating Asthma
7. Chest Pain Can Be Identified By New Tracer Chemical 30 Hours After Pain Relief
8. New Chemical May Halt HIV Infection
9. High Levels Of Cancer Chemical Found In Soft Drinks
10. Sedatives Derived From Chemicals Can Make Elderly Nervous
11. Chemicals causing Cancer Found In Soft Drinks In UK
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Chemical Signaling Helps Regulate Sensory Map Formation The Brain

(Date:7/11/2014)... When the mercury rises, heat can strain the limits ... takes on a heavier load in hot weather to keep ... the Harvard Men's Health Watch . , For otherwise ... knowing their limits and drinking enough fluids. But what about ... sensitive to the heat," says Dr. Joanne Foody, Director of ...
(Date:7/11/2014)... 11, 2014 Los Angeles dental ... he uses mini and full mouth implants to replace ... feature that distinguishes dental implants from other tooth replacements: ... the crowns. This alone prevents the long-term complications of ... advantages related to comfort, appearance and systemic health. Mini ...
(Date:7/11/2014)... A new study challenges the widely held belief that light ... Researchers analyzed more than 50 studies that examined drinking habits ... found that those with a form of a gene tied ... gene affects how a person,s body breaks down alcohol, resulting ... this variant has been shown to lead to lower drinking ...
(Date:7/11/2014)... (PRWEB) July 11, 2014 Cancer researchers ... have a significant impact on how patients respond to ... for mesothelioma. Surviving Mesothelioma has the full story. ... , Researchers at the University of Ljubljana and the ... pemetrexed for different types of polymorphisms. They found ...
(Date:7/11/2014)... 11, 2014 Anterior Cruciate Ligament (ACL) ... the type of material used to create a new ... game, say researchers presenting their work today at the ... Medicine ( AOSSM ). , “Our study ... (tissue harvested from a donor) fail more frequently than ...
Breaking Medicine News(10 mins):Health News:Take Common Sense Steps to Stay Safe This Summer, from the July 2014 Harvard Men's Health Watch 2Health News:Take Common Sense Steps to Stay Safe This Summer, from the July 2014 Harvard Men's Health Watch 3Health News:Dental Implant Dentist, Kevin Sands DDS, Now Uses Mini and Full Mouth Implants to Replace Missing Teeth 2Health News:A Little Alcohol May Not Be Good for Your Heart After All 2Health News:New Research Finds Genetic Variables Impact Chemotherapy Response, According to Surviving Mesothelioma 2Health News:ACL Reconstructions May Last Longer With Autografts 2
... disorders in this country has nearly doubled in the past ... psychologists and therapists are charged with the task, but many ... date and lack scientific rigor. This is in part because ... programs and for-profit training centersare not grounded in science. ...
... today for excellence in research, advancing oral health ... receive the 2009 American Dental Association,s (ADA) Gold Medal Award ... presentation during a meeting of the ADA,s House of ... every three years, the award honors individuals who contribute to ...
... Beginning October 1st, The Peninsula Chicago will dedicate itself to ... several cancer research and education organizations. , "We all know ... some way and this is why we at The Peninsula ... manager of The Peninsula Chicago. "In addition to the initiatives ...
... the largest non-government, not-for-profit funding source of cancer research ... research and training grants totaling $45,097,000 to 61 institutions ... 2009. The grants go into effect beginning January 1, ... Cancer Society has funded research and training of health ...
... ... Medical Center,s Emergency Department will begin using a new procedure, called therapeutic hypothermia, to ... , ... 2009 -- On October 19, 2009, Baptist Medical Center,s Emergency Department will ...
... Organization Exclusively for LTC Consumers Receives ... (formerly the National Citizens, Coalition for Nursing Home Reform) announced ... will help strengthen the organization,s role as a voice for ... organization exclusively for residents and their families and is a ...
Cached Medicine News:Health News:Where's the science? The sorry state of psychotherapy 2Health News:ADA's 2009 Gold Medal Award Presentation Set for 150th Annual Session 2Health News:The Peninsula Chicago Gives Back During Breast Cancer Awareness Month 2Health News:American Cancer Society awards 94 new research and training grants at 61 institutions nationwide 2Health News:American Cancer Society awards 94 new research and training grants at 61 institutions nationwide 3Health News:American Cancer Society awards 94 new research and training grants at 61 institutions nationwide 4Health News:American Cancer Society awards 94 new research and training grants at 61 institutions nationwide 5Health News:Baptist Using Therapeutic Hypothermia to Save Heart Attack Patients 2Health News:Long-Term Care Consumer Voices Strengthened 2
(Date:7/10/2014)... 10, 2014 CVS Caremark Corporation (NYSE: ... approved a quarterly dividend of $0.275 (27.5 cents) per share ... August 1, 2014, to holders of record on July 21, ... Caremark is dedicated to helping people on their path to ... the United States . Through the company,s more ...
(Date:1/15/2014)... Markets ( http://www.researchandmarkets.com/research/6k27gw/dental ) has announced the addition of ... Size, Share, Growth, Trends And Forecast, 2013 - 2018" ... http://photos.prnewswire.com/prnh/20130307/600769 ) Dental consumables ... to treat dental impairments, for tooth restoration and in ...
(Date:1/15/2014)... 15, 2014 Massachusetts General Hospital (MGH), the ... ) announced today that they have launched a ... therapeutic targets and develop novel therapies for inflammatory ... millions worldwide. The MGH-Broad-Amgen collaboration brings together scientists ...
Breaking Medicine Technology:Dental Consumables Market - Global Industry Analysis, Size, Share, Growth, Trends And Forecast, 2013 - 2018 2Dental Consumables Market - Global Industry Analysis, Size, Share, Growth, Trends And Forecast, 2013 - 2018 3Mass. General, Broad Institute and Amgen Will Work to Discover New Drugs for Inflammatory Bowel Disease 2Mass. General, Broad Institute and Amgen Will Work to Discover New Drugs for Inflammatory Bowel Disease 3Mass. General, Broad Institute and Amgen Will Work to Discover New Drugs for Inflammatory Bowel Disease 4
... Addressing the key clinical and economic issues ... System is designed to maximize tension control ... The system combines efficient instrumentation with a ... Grip system is indicated for general orthopaedic ...
... In 1985, the worlds first ... by Howmedica Osteonics as a means ... wire for trochanteric reattachment procedures. Today, ... papers demonstrating clinical successes, the Dall-Miles™ ...
The Assistant Free Self-Retaining Hip Surgery Retractor System is used for hip arthroplasty and hip fracture surgery....
... have become the accepted standard for,excellence and ... AML Total Hip System was the first ... meet the needs for biological fixation in ... 15 years of documented clinical performance, the ...
Medicine Products: