Navigation Links
5-limbed brittle stars move bilaterally, like people
Date:5/9/2012

PROVIDENCE, R.I. [Brown University] It appears that the brittle star, the humble, five-limbed dragnet of the seabed, moves very similarly to us.

In a series of first-time experiments, Brown University evolutionary biologist Henry Astley discovered that brittle stars, despite having no brain, move in a very coordinated fashion, choosing a central arm to chart direction and then designating other limbs to propel it along. Yet when the brittle star wants to change direction, it designates a new front, meaning that it chooses a new center arm and two other limbs to move. Brittle stars have come up with a mechanism to choose any of its five limbs to be central control, each capable of determining direction or pitching in to help it move.

The findings are published in the Journal of Experimental Biology.

Many animals, including humans, are bilaterally symmetrical they can be divided into matching halves by drawing a line down the center. In contrast, brittle stars are pentaradially symmetrical: There are five different ways to carve them into matching halves. Whereas bilateral symmetrical organisms have perfected locomotion by designating a "head" that charts direction and then commands other body parts to follow suit, radial symmetrical animals have no such central directional control.

"What brittle stars have done is throw a wrench into the works," Astley said. "Even though their bodies are radially symmetrical, they can define a front and basically behave as if they're bilaterally symmetrical and reap the advantages of bilateral symmetry."

"For an animal that doesn't have a central brain, they're pretty remarkable," said Astley, the sole author of the paper.

Astley decided to study brittle stars after noticing that their appendages acted much like a snake's body, capable of coiling and unfurling from about any angle. Yet when watched brittle stars move about, he couldn't figure out how the individu
'/>"/>

Contact: David Orenstein
david_orenstein@brown.edu
401-863-1862
Brown University
Source:Eurekalert  

Page: 1 2

Related biology news :

1. The brittleness of aging bones -- more than a loss of bone mass
2. Florida State chemist to receive prestigious award for rising faculty stars
3. Grand Challenges Canada announces innovative rising stars in global health
4. Astronomers reach for the stars to discover new cancer therapy
5. Shootingstars provide clues to likely response of plants to global warming
6. Luteolin stars in study of healthful plant compounds
7. Study: Sea stars bulk up to beat the heat
8. Australian filmmakers are stars of science film awards
9. Gold nanostars outshine the competition
10. Why do people choke when the stakes are high?
11. Southampton researchers lead 2 international projects to help people out of poverty
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
5-limbed brittle stars move bilaterally, like people
(Date:4/23/2014)... the source of a unique rhythmic sound, recorded for ... is the Antarctic minke whale ( Balaenoptera bonaerensis ). ... 1960s who thought it sounded like a duck, the ... the Southern Ocean, but its source has remained a ... team of researchers deployed acoustic tags on two Antarctic ...
(Date:4/23/2014)... Buenos Aires yesterday, Argentina joins the European Molecular ... The move strengthens the ties between the European ... Argentinian scientists access to EMBL,s world-class facilities and ... since its inception, fostering excellent life science research ... core of EMBL,s mission," says EMBL Director General ...
(Date:4/23/2014)... first cause of dementia and affects some 400,000 people ... been found. One of the reasons for this is ... cause alterations in nerve transmissions and the loss of ... from the Institute of Neuroscience at the Universitat Autnoma ... memory consolidation and were able to develop a gene ...
Breaking Biology News(10 mins):Scientists identify source of mysterious sound in the Southern Ocean 2Scientists identify source of mysterious sound in the Southern Ocean 3Loss of memory in Alzheimer's mice models reversed through gene therapy 2
... an obscure retrovirus derived from mice was the result ... tissue samples and lab experiments some dating back ... which scientists have questioned repeatedly over the last couple ... when the telltale signature of the virus, known as ...
... disabilities, along with their families, can look forward to ... Institute (DDI) at Wayne State University. The institute ... U.S. Administration for Children and Families. As a ... the development of inclusive communities and quality of life ...
... father,s symposium. This is a gathering of eagles," says ... E.E. Just Symposium. The conference is drawing some of ... September 27-29, 2012. Alexander is the newly appointed E.E. ... symposium celebrates the spirit of scientific courage and interdisciplinary ...
Cached Biology News:New study confirms erroneous link between XMRV and prostate cancer-contamination was the cause 2New study confirms erroneous link between XMRV and prostate cancer-contamination was the cause 3New study confirms erroneous link between XMRV and prostate cancer-contamination was the cause 4Wayne State receives $2.8 million grant from US Administration for Children and Families 2Wayne State receives $2.8 million grant from US Administration for Children and Families 3Science stars head to Dartmouth for the E.E. Just Symposium 2
(Date:1/15/2014)... (PRWEB) January 15, 2014 DTS Language ... its Online Web Portal for Life Science organizations who need ... specify the subject matter of their documents in advance with ... help reduce time-to-delivery of translations, often a critical factor in ...
(Date:1/14/2014)... Doylestown, PA (PRWEB) January 14, 2014 Date: ... p.m. , Location: Warrington Country Club, 1360 Almshouse Road, Warrington, ... only national nonprofit organization solely dedicated to finding a cure ... those affected worldwide, will host its annual Crystal Ball on ...
(Date:1/14/2014)... January 14, 2014 EquitiesIQ, a leading ... (OTCQB: ALQA). Alliqua is an emerging biomedical company acquiring, ... wound care market. , Free report download: http://equitiesiq.com/reports/alliqua/ ... a seasoned management team and Board, which launched the ...
(Date:1/14/2014)...  RXi Pharmaceuticals Corporation (OTCQX: RXII), a biotechnology company ... addressing major unmet medical needs using RNA-targeted technologies, ... Allowance from the United States Patent and Trademark ... for the treatment of fibrosis. The patent covers ...
Breaking Biology Technology:DTS Improves Efficiency for Life Science Document Translations 2Hepatitis B Foundation to Host Annual Crystal Ball Gala 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 2RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 3
... Inc.,(Amex: DDD ) today announced that the Company ... Conference to be held on November 10-12 at,the New ... O. Wilds, SCOLR Pharma,s President and CEO, is scheduled ... November 11,2008 at 12:00 p.m. ET. For more information ...
... 3 Top-line preliminary data,from a Phase II/III ... treatment of acute heart failure will be presented ... Heart Association,s (AHA),Scientific Sessions 2008 in New Orleans., ... University of California,San Francisco, will present the data ...
... BEIJING, Nov. 3 /Xinhua-PRNewswire/ -- Sinovac Biotech Ltd. ... today its,Beijing-based subsidiary and main operating entity, Sinovac ... China 2008. The results were,announced on October 31, ... Yin,Weidong, general manager of Sinovac Beijing and President ...
Cached Biology Technology:Top-Line Preliminary Data From Phase II/III Study of Corthera's Relaxin in Acute Heart Failure to be Presented in Satellite Symposium at AHA Scientific Sessions 2008 2Sinovac Named to Deloitte Technology Fast 50 China 2Sinovac Named to Deloitte Technology Fast 50 China 3
Mouse monoclonal [1-N-14] to Adenovirus Type 7 hexon C11 Immunogen: Purified Adenovirus type 7 Specificity: This antibody is specific for Adenovirus type 7 hexon C11....
... epitope is specific for Kir2.1 and ... known protein.,SPECIES REACTIVITIES: The immunogen ... porcine and guinea pig. It is ... (17/19 residues) and chick (15/19 residues). ...
Request Info...
... is the main excitatory neurotransmitter in the ... considered to act only on the ligand-gated ... that are involved in the fast excitatory ... to regulate enzymes producing second messengers via ...
Biology Products: