Navigation Links
Pitt, Berkeley researchers reconstruct seashells to model nervous system function
Date:4/9/2009

dge and the sight of the ball coming at you dictate your action. A mollusk collects sensory information from its previous pigmentation and converts it into motor action by producing more pigmentation and continuing the pattern."

To construct their model, the team studied electron microscope images of mollusk mantles to understand the neurons connecting the sensing cells in the mantle with the secretory cells that produce calcium carbonate and pigmented proteins. The team found that the excitatory and inhibitory synapseswhich promote or diminish cell activitysurrounding the secretory cells and the cells' firing thresholds act as a neural network that determines how much calcium and pigment the mollusk secretes. Different rates of calcium carbonate secretion determine the shape of the shell, while different amounts of pigment result in a pattern unique to each species.

For instance, shell ridges result from one cell increasing calcium carbonate secretion while depressing secretion from surrounding cells. The researchers also found three basic patterns of shell pigmentation determined by excitatory and inhibitory activity: stripes perpendicular to the growing edge, bands parallel to the growing edge, and more complex "traveling wave" patterns such as zigzags and chevrons.

With striped shells, a pigment-secreting cell inhibits secretion of pigment by neighboring cells but not itself, so that the same pattern is repeated day after day, yielding a stripe. Bands parallel to the growing edge form when pigment secreted on one day inhibit secreting cells for a few days, resulting in an on/off pattern. "Traveling wave" patterns of diamonds, zigzags, arrowheads, and other shapes come about when a pigment inhibits future secretion at that site but excites secretion in surrounding cells, so that pigment moves laterally on successive days like a wave.

"Our real contribution was not reproducing the patterns, but showing that the nervous system ca
'/>"/>

Contact: Morgan Kelly
mekelly@pitt.edu
412-624-4356
University of Pittsburgh
Source:Eurekalert

Page: 1 2 3

Related medicine news :

1. Innovator Award to Berkeley Labs Joe Gray for improved breast cancer screening
2. Berkeley Premium Nutraceuticals Pushes Forward
3. Free Cab Rides Home for Halloween in Alameda, Oakland, Berkeley and San Francisco, California
4. Stanford researchers find culprit in aging muscles that heal poorly
5. UCLA researchers identify markers that may predict diabetes in still-healthy people
6. Mayo Clinic researchers discover new diagnostic test for detecting infection in prosthetic joints
7. Bipolar disorder relapses halved by Melbourne researchers
8. Cell that triggers symptoms in allergy attacks can also limit damage, Stanford researchers find
9. High and mighty: first common height gene identified by researchers behind obesity gene finding
10. Researchers estimate about 9 percent of US children age 8 to 15 meet criteria for having ADHD
11. Majority of 2.4 Million U.S. Children With ADHD Not Diagnosed or Consistently Treated, According to New Gold Standard Study by Cincinnati Childrens Researchers
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/23/2014)... of research suggesting a safe and effective role ... cancer, with fewer detrimental side effects and improved ... study will be published in final format today ... Endocrinology . , Breast cancer is the most ... States. Approximately 70% of breast cancers are diagnosed ...
(Date:7/23/2014)... July 23, 2014 Rich Dad® Education, a ... of their charity yard sale to support Habit for Humanity ... 100% of the proceeds will be donated to Habitat for ... are being donated to the Habitat for Humanity ReStore thrift ... 33903. , One of the highlights of the yard ...
(Date:7/23/2014)... York (PRWEB) July 23, 2014 Thousands ... to move forward in a federal multidistrict litigation underway ... Liebhard LLP reports. According to an Order dated July ... hospital’s bid for payment of a $1,000 fee for ... implant. , Among other things, the Order noted ...
(Date:7/23/2014)... better treating the pernicious disorders of obesity and dementia ... American University,s Center for Behavioral Neuroscience. In the paper, ... aimed at areas of the brain responsible for memory ... could play a role in reducing certain dementias., "In ... measures often fall short. This is a new way ...
(Date:7/23/2014)... Olympic gold medal-winning speed skater Chad ... Friday, July 18. Hedrick visited Roanoke as the special ... an Olympic-style event celebrating its 25th Anniversary in 2014. ... premier sponsor of the Commonwealth Games, which like Foot ... and all activity levels. , Hedrick, a native of ...
Breaking Medicine News(10 mins):Health News:Hormones after breast cancer: Not fuel for the fire after all? 2Health News:Hormones after breast cancer: Not fuel for the fire after all? 3Health News:Hormones after breast cancer: Not fuel for the fire after all? 4Health News:Hormones after breast cancer: Not fuel for the fire after all? 5Health News:Rich Dad Education Charity Yard Sale Raises Over $650 for Habitat for Humanity of Lee and Hendry Counties 2Health News:DePuy Pinnacle Hip Lawsuits Move Forward, as Federal Judge Denies Hospital Bid for $1000 Explant Fee, Bernstein Liebhard LLP Reports 2Health News:DePuy Pinnacle Hip Lawsuits Move Forward, as Federal Judge Denies Hospital Bid for $1000 Explant Fee, Bernstein Liebhard LLP Reports 3Health News:DePuy Pinnacle Hip Lawsuits Move Forward, as Federal Judge Denies Hospital Bid for $1000 Explant Fee, Bernstein Liebhard LLP Reports 4Health News:Targeting the brain to treat obesity 2Health News:Targeting the brain to treat obesity 3Health News:US Olympian Chad Hedrick Visits Foot Levelers 2
... , ... Care of Serious Illness is the first book to provide a comprehensive look at the ... E. Meier, Stephen L. Isaacs, Robert Hughes (Editors) , ... New York, NY (Vocus) April 1, 2010 -- Palliative Care: Transforming ...
... they know how cytomegalovirus continues to re-infect people , THURSDAY, ... how a virus known as cytomegalovirus (CMV), which infects up ... re-infects people again and again even though their immune systems ... always make people ill, but certain people, such as newborns ...
... SNM and the Radiological Society of North America (RSNA) ... at the Natcher Conference Center of the National Institutes ... workshop will focus on general issues of standardization to ... and analysis of images in clinical trials. The second ...
... beat vitamin B for those with scent-robbing viral infection, ... Acupuncture may help people who lose their sense of ... a new study, 15 patients with post-viral olfactory dysfunction ... acupuncture. These patients were compared with PVOD patients treated ...
... new study of brain activity in depressed and anxious people ... modified for better or for worse by anxiety. ... Behavioral Neuroscience , looked at depression and two types of ... panic; and anxious apprehension, better known as worry. The ...
... ... Mac platforms , ... Richardson, TX (PRWEB) April 1, 2010 -- Damaka, a technology pioneer in Mobile ... Real-time 2-way Video, Application Sharing) Sweeping™ between laptops and mobile devices earlier in May ...
Cached Medicine News:Health News:Palliative Care: Transforming the Care of Serious Illness 2Health News:Palliative Care: Transforming the Care of Serious Illness 3Health News:Demystifying a Common, Persistent Virus 2Health News:FDA, SNM and RSNA host April 13-14 two-topic imaging workshop 2Health News:Depressed? Fearful? It might help to worry, too 2Health News:Damaka Delivers Advanced Sweeping™ Capability of Live Sessions Across Multiple Devices Over WiFi, 3G and 4G Networks 2
(Date:7/23/2014)... July 23, 2014 PositiveID Corp. (OTCQB: PSID), ... , is an emerging player in the bio-threat ... bio-threat detection and rapid medical testing. The Company,s ... Bio-agent Autonomous Networked Detector), was developed under contract ... Science & Technology directorate, and $30 million of ...
(Date:7/23/2014)... Research and Markets has announced the addition ... Markets Worldwide 2014" report to their offering. ... purpose of this report is to analyze and size ... Gloves. The report discusses key players and identifies trends ... covered include product definitions, strategies, competitive analysis, market shares, ...
(Date:7/23/2014)... , July 23, 2014  The management team ... ) will hold a conference call on July ... second quarter ended June 30, 2014.  The call ... 2014Time: , 8:30 am EDTDial-in numbers: , Toll ... (412) 317-0790Webcast (live & archive): , www.columbialabs.com ...
Breaking Medicine Technology:PositiveID Analyst Inspection: Emerging Contender in BioThreat Detection - First Ever Revenue Guidance and Backlog Position Company for Increased Visibility and Traction - by SmallCapTraders.com 2Disposable Medical Gloves (Exam and Surgical) Markets Worldwide 2014 2Disposable Medical Gloves (Exam and Surgical) Markets Worldwide 2014 3Disposable Medical Gloves (Exam and Surgical) Markets Worldwide 2014 4Columbia Laboratories to Discuss Second Quarter 2014 Financial Results on July 31st Conference Call 2
... MAQUET Cardiovascular LLC today announced the launch ... VASOSHIELD Pressure Controlling Syringe for use during Coronary Artery ... "flushing" pressure and controls vessel distension when harvested grafts ... Avoiding excessive pressure and limiting distension help maintain internal ...
... N.J. , May 3 Covance Inc. (NYSE: CVD ... Health Care Conference on Tuesday, May 4, 2010 at 1:30 ... www.covance.com .  In order to register and download any necessary software, please ... , Covance, ...
Cached Medicine Technology:MAQUET Cardiovascular Introduces New VASOSHIELD Pressure Controlling Syringe to Help Preserve Graft Integrity for Coronary Artery Bypass Surgery Patients 2MAQUET Cardiovascular Introduces New VASOSHIELD Pressure Controlling Syringe to Help Preserve Graft Integrity for Coronary Artery Bypass Surgery Patients 3MAQUET Cardiovascular Introduces New VASOSHIELD Pressure Controlling Syringe to Help Preserve Graft Integrity for Coronary Artery Bypass Surgery Patients 4
Full plate covers seal all 24 MicroAmp tubes...
96-Well PCR Plate Sealing Mat...
Easy to pierce, remove using foil stripper...
Inquire...
Medicine Products: