Evolutionary biologists Timothy Higham of Clemson and Anthony Russell of Calgary presented their findings in "biology letters" published online Sept. 9th. Their article is titled, "Flip, flop and fly: modulated motor control and highly variable movement patterns of autotomized gecko tails." The Web site is http://rsbl.royalsocietypublishing.org/content/firstcite
"Autotomy is the process by which an appendage is voluntarily shed by animal. A number of reptiles, amphibians, mammals and many invertebrates developed the defense mechanism over time," said Higham. "Some geckos' severed tails can move repeatedly, allowing the gecko to escape and grow a replacement. It's like a gecko's personal injury insurance policy."
Higham and Russell explored how the tail continues to function, using motion to entice a predator while the gecko escapes.
The research shows that a severed – autotomized – tail of leopard gecko makes four to eight rhythmic moves per second with one or two complex movements – dramatic flips or lunges – during the first 50 seconds of its separation.
How does the tail do it? The scientists theorize that central pattern generators in the tail control the actions. Central pattern generators are made up of a network of nerve cells that enable repeatable pattern of behavior, such as chewing, walking, flying.
The gecko study adds to the evidence that central pattern generator networks can function without being linked to a brain or central nervous system. The findings present the prospect that human central pattern generators could play a role in restoring motion to people with spinal injuries.
"The autotomized gecko tail may be an excellent model for understanding the spontaneous activity that is sometimes observed following partial and complete spinal cord injury," conclude Higham and Russell.
Timothy E. Higham | EurekAlert!
Researchers develop eco-friendly, 4-in-1 catalyst
25.04.2017 | Brown University
Transfecting cells gently – the LZH presents a GNOME prototype at the Labvolution 2017
25.04.2017 | Laser Zentrum Hannover e.V.
More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...
Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
20.04.2017 | Event News
18.04.2017 | Event News
03.04.2017 | Event News
25.04.2017 | Physics and Astronomy
25.04.2017 | Materials Sciences
25.04.2017 | Life Sciences