Cockroaches could help build better robots in future
- Narendra Modi new talking point in Tamil Nadu, but few say they will vote for him
- 78 pc turnout, but few can show ink mark
- Giriraj Singh stands by his Pak remark; BJP dissociates itself from him
- Pratapgarh Dalits angry with Mayawati, Muslims feel âunsafeâ
- RSS appeal to âmajorityâ: Vote or become history
Researchers have found that running cockroaches start to recover from being shoved sideways before their dawdling nervous system kicks in to tell their legs what to do.
These new insights on how biological systems stabilize could one day help engineers design steadier robots and improve doctors' understanding of human gait abnormalities.
In experiments, the roaches were able to maintain their footing mechanically using their momentum and the spring-like architecture of their legs, rather than neurologically, relying on impulses sent from their central nervous system to their muscles.
"The response time we observed is more than three times longer than you'd expect," Shai Revzen, an assistant professor of electrical engineering and computer science, as well as ecology and evolutionary biology, at the University of Michigan researchers have found.
"What we see is that the animals' nervous system is working at a substantial delay," Revzen said. "It could potentially act a lot sooner, within about a thirtieth of a second, but instead, it kicks in after about a step and a half or two steps about a tenth of a second. For some reason, the nervous system is waiting and seeing how it shapes out," he said.
To arrive at their findings, the researchers sent 15 cockroaches (one-by-one, in 41 trials) running across a small bridge onto a placemat-sized cart on wheels. The cart was attached to an elastic cord that was pulled tight like a loaded slingshot and held in place with a strong magnet on the other side. Once a roach was about a body length onto the cart, the researchers released the magnet, sending the cart hurling sideways. The force was equivalent to a sumo wrestler hitting a jogger with a flying tackle, said Revzen, adding that cockroaches are much more stable than humans.
To gather detailed information about the roaches' gait, the researchers utilized a technique Revzen developed several years ago called kinematic phase analysis. It involves using a high-speed camera to constantly measure the position of each of the insects' six feet as well as the ends of its body.
- 21-year-old dies in road mishap, one injured
- Ask Badals where is Ludhiana Metro: Bhattal to locals
- Arrests in priest murder case divide Catholic Church
- Short Change: EPFO to allot permanent account number to active subscribers by Oct 15
- India Inc profit set to grow, but margins under pressure
- Mulayam: Will amend Constitution for Muslim quota