Navigation Links
Astrocytes help separate man from mouse
Date:3/23/2009

A type of brain cell that was long overlooked by researchers embodies one of very few ways in which the human brain differs fundamentally from that of a mouse or rat, according to researchers who published their findings as the cover story in the March 11 issue of the Journal of Neuroscience.

Scientists at the University of Rochester Medical Center found that human astrocytes, cells that were long thought simply to support flashier brain cells known as neurons that send electrical signals, are bigger, faster, and much more complex than those in mice and rats.

"There aren't many differences known between the rodent brain and the human brain, but we are finding striking differences in the astrocytes. Our astrocytes signal faster, and they're bigger and more complex. This has big implications for how our brains process information," said first author Nancy Ann Oberheim, Ph.D., a medical student who recently completed her doctoral thesis on astrocytes.

The study is one of the most extensive examinations yet of the astrocyte. Oberheim and co-authors discovered a previously unknown form of the cell, a varicose projection astrocyte, in the human brain but not in the rodent brain. The team also found that the most abundant type of astrocyte, protoplasmic astrocytes, are approximately 2.6 times larger than their rodent counterparts, and that the human cells have about 10 times as many "processes," or structures designed to connect to other cells.

"We have not really been able to understand why the human brain is so much more capable than that of any other animal," said neuroscientist Maiken Nedergaard, M.D., D.M.Sc., who led the study. "Some people have thought that it's simply that a bigger brain is a better brain, but an elephant's brain is bigger than a person's, for example, but it's not nearly as powerful. So that's not the answer.

"It may be that humans have a much higher brain capacity in large part because our
'/>"/>

Contact: Tom Rickey
tom_rickey@urmc.rochester.edu
585-275-7954
University of Rochester Medical Center
Source:Eurekalert

Page: 1 2 3 4

Related medicine news :

1. Targeting astrocytes slows disease progression in ALS
2. Conjoined Twins Separated by Surgical Team at Childrens Hospital of Pittsburgh of UPMC During Complex, 24-Hour Procedure
3. Brain Switchboard Separates Learning, Remembering
4. First Americans Arrived on 2 Separate Paths
5. Each finger can be moved separately
6. Highlands Acquisition Corp. Announces Separate Trading of Common Stock and Warrants
7. Olympic Gold Medalist Marion Jones-Thompson Pleads Guilty to Making False Statements in Two Separate Federal Criminal Investigations
8. Mouse Study Suggests ADHD Drug Might Be Addictive
9. Living with females extends the reproductive life of the male mouse, says Penn veterinary researcher
10. Cosmetic Surgery -Goldilocks Anesthesia Is Not Mickey Mouse
11. Common anesthetic induces Alzheimers-associated changes in mouse brains
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/22/2015)... Deer Path of Huntley -- a BMA affordable assisted ... 3 p.m. to 4 p.m. on Feb. 13. , The community, ... adults with physical disabilities between the ages of 22 and 64. ... and sweetheart-themed karaoke. , For more information about the event or ...
(Date:1/22/2015)... West Hollywood, California (PRWEB) January 22, 2015 The ... 22, 2015 at 10 a.m., to commemorate the 42nd anniversary of ... the United States. , “It’s been 42 years since the Roe ... to choose is still as present as ever,” said City of ...
(Date:1/22/2015)... VogueQueen is a seasoned and trusted leader who consistently ... thrilled to have it lead the wedding dress industry into ... prom dresses for the global market. , “The CEO of ... he focuses on continuing the goal of operational excellence and ...
(Date:1/22/2015)... AngelWeddingDress, the premier women’s dress supplier, has ... View website of AngelWeddingDress.com to find more ... dresses online for a bridal party. AngelWeddingDress offers a ... them. Its maternity wedding dresses are specially designed for ...
(Date:1/22/2015)... Thousand of GranuFlo lawsuits ( http://www.granuflolawsuit2014.com/ ... GranuFlo and NaturaLyte dialysis concentrates continue to move forward ... Court, District of Massachusetts, Bernstein Liebhard LLP reports. According ... remanded a case filed by the state of Louisiana ...
Breaking Medicine News(10 mins):Health News:Deer Path of Huntley Affordable Assisted Living to Host Valentine's Day Happy Hour 2Health News:VogueQueen Unveils New Designs of Prom Dresses for 2015 2Health News:AngelWeddingDress Has Recently Released Its Collection Of 2015 Maternity Wedding Dresses 2Health News:Court Overseeing Federal GranuFlo Lawsuits Remands Louisiana Claim Back to State Court, Bernstein Liebhard LLP Reports 2Health News:Court Overseeing Federal GranuFlo Lawsuits Remands Louisiana Claim Back to State Court, Bernstein Liebhard LLP Reports 3Health News:Court Overseeing Federal GranuFlo Lawsuits Remands Louisiana Claim Back to State Court, Bernstein Liebhard LLP Reports 4
... the years been a high source of nutrition for many ... be eaten in several forms, it is the key ingredient ... just round the corner an animal rights group in Kerala, ... not to eat eggs. ,Volunteers of People for ...
... are leading the world in their obsession for that ‘bronzed ... trend, opine researchers. // ,According to a report ... Health, the increases in people going in for tanning sessions ... in the light of accumulating evidence of the association between ...
... in the US, the public libraries in that country are slowly ... weather -- hot, cold, or wet -- most of the homeless ... local shelters push them out onto the streets at six in ... already lining up by nine, when the library opens, because they ...
... by David Pitts. Larry Quirk was a lover of Billings, who ... “Lem Billings was a close friend of Late US president John ... further.” ,"There was a sexual element to his ... the 1930s... Billings was the only person who loved Kennedy unconditionally, ...
... novel enzymes that could help convert blood groups A, B ... shortage of blood available for transfusion to those in need ... group that could be donated to any one. ... the University of Copenhagen in Denmark say that they have ...
... by researchers at the Keck School of Medicine of ... School has identified// seven genetic risk factors—DNA sequences carried ... prostate cancer. According to the study's findings, these risk ... human genome on chromosome 8 and powerfully predict a ...
Cached Medicine News:Health News:Sultans of Suntans Warned 2Health News:Public Libraries Turning into Shelters for the Homeless in the US 2Health News:Breakthrough in Converting Blood Groups 2Health News:Study Identifies Multiple Genetic Risk Factors for Prostate Cancer 2
(Date:1/23/2015)... 23, 2015  Now available for sale, The Armor1 Ankle ... prevents ankle sprains by cushioning the ankle from an ... around the outside of any shoe type and allows ... still offering protection against sprains. With customers in physical ...
(Date:1/23/2015)... JUNCTION, N.J. , Jan. 23, 2015  CytoSorbents ... company commercializing its CytoSorb® extracorporeal cytokine adsorber to ... patients, announced the receipt of $385,642, net of ... participant of the Technology Business Tax Certificate Transfer ...
(Date:1/22/2015)... a privately held medical device company, announced today that ... ITOCHU Corporation (Tokyo Stock Exchange TYO: 8001) to sell ... cancer in Japan . ViewRay,s technology, ... only MRI-guided radiation therapy system that images and treats ...
Breaking Medicine Technology:The Armor1 Ankle Roll Guard is the New Breakthrough Solution for Ankle Sprain Prevention! 2CytoSorbents Receives $385,000 in Non-Dilutive Funding from the New Jersey Technology Business Tax Certificate Transfer Program 2CytoSorbents Receives $385,000 in Non-Dilutive Funding from the New Jersey Technology Business Tax Certificate Transfer Program 3ITOCHU Named the Exclusive Distributor for ViewRay's MRI-Guided Radiation Therapy System in Japan 2
Hand surgery basic instrument set...
Castroviejo caliper...
Microscopic scissors, curved...
Velcro closures on each side to more evenly distribute the weight. Available in teal, royal, red, purple, or maroon nylon stain-resistant fabric or navy nylon reinforced vinyl....
Medicine Products: