HOME >> BIOLOGY >> NEWS
'Electric' fish shed light on ways the brain directs movement

otion.

"These fish are ideal both because we can easily monitor the sensing signals that their brains use and because the task we asked the fish to do -- swim forward and backward inside a small tube -- is very simple and straightforward," said Fortune, who also uses the fish to study the neural basis and evolution of behavior.

The fish prefer to "hide" inside these tubes, which are immersed in larger water tanks. In their research, Cowan and Fortune challenged the fish's ability to remain hidden by shifting the tubes forward and backward at varying frequencies. This required the fish to swim back and forth more and more rapidly in order to remain inside the tubes. But as the frequency became higher, the fish gradually failed to keep up with the movement of the tubes.

The team's detailed engineering analysis of the fish's adjustments under these conditions suggested that the animal's sensors and brains are "tuned" to consider Newton's laws of motion, Cowan said. In other words, the team found that the fish's nervous systems measured velocity, so the fish could accelerate or "brake" at just the right rate to remain within the moving tube.

"The fish were able to accelerate, brake and reverse direction based on a cascade of adjustments made through their sensory and nervous systems, in the same way that a driver approaching a red light knows he has to apply the brakes ahead of time to avoid overshooting and ending up in the middle of a busy intersection," Fortune said. "Your brain has to do this all the time when controlling movement because your body and limbs, like a car, have mass. This is true for large motions that require planning, such as driving a car, but also for unconscious control of all movements, such as reaching for a cup of coffee. Without this sort of predictive control, your hand would knock the cup off the table every time."

The researchers' understanding of the complex relationship bet
'"/>

Contact: Lisa De Nike
LDE@jhu.edu
443-287-9960
Johns Hopkins University
31-Jan-2007


Page: 1 2 3

Related biology news :

1. Other highlights in the Aug. 7 JNCI
2. Research team enlightens the reasons for severe blindness
3. Coelacanth fossil sheds light on fin-to-limb evolution
4. Molecule blocks gene, sheds light on liver cancer
5. ESA mission highlighted at remote sensing conference
6. Surprising new species of light-harvesting bacterium discovered in Yellowstone
7. Other highlights in the July 24 JNCI
8. Enzyme discovery sheds light on vitamin D
9. Study sheds light on why humans walk on two legs
10. Other highlights from the July 10 JNCI
11. Internal clock, external light regulate plant growth

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Electric fish shed light ways the brain directs movement

(Date:3/26/2015)... The Granite Club, ... club, today announced it has implemented a state-of-the-art access ... for members and staff, while restricting access to authorized ... selected FST,s IMID Access system because it has the ... and staff, in addition to unparalleled security," said ...
(Date:3/24/2015)... 2015   NexID Biometrics LLC, whose spoof-mitigation ... today announced the beginning of shipments of version 2.0 ... The company, based in Potsdam, N.Y. ... Expo, which began here today at the Walter E. ... of its SDK boosts the accuracy rate range to ...
(Date:3/23/2015)... --  HOYOS Labs , a leading global authentication infrastructure ... Company will demonstrate multiple biometrics-based technologies under its identity ... on March 23 through 25, 2015, in ... IEEE Biometric Open Protocol Standard; free biometrics-based consumer app, ... system. BOPS was invented by HOYOS Labs and contributed ...
Breaking Biology News(10 mins):Granite Club First Private Club in North America to Implement FST Biometrics Secure Access Solution, as Part of Multi-million Dollar Expansion 2NexID Begins Shipments Of Version 2.0 Fake-Finger-Detection Solution 2HOYOS Labs to Showcase Host of Biometrics Technologies at Connect:ID in Washington, D.C. 2HOYOS Labs to Showcase Host of Biometrics Technologies at Connect:ID in Washington, D.C. 3
(Date:4/23/2015)... Six startups from Russia traveled ... as part of the U.S.-Russia Innovation Corridor (USRIC) ... biotechnology startups to participate in the program since ... the University of Maryland (UMD) signed a Memorandum ... universities in the biomedical industry in 2013. , ...
(Date:4/23/2015)... SAN FRANCISCO, Calif. , April 23, 2015  Veracyte, ... has entered into a definitive agreement to sell approximately ... placement. Under the agreement, the investors will purchase an ... purchase price of $8.15 per share, the closing stock ... led by new and existing investors, including Broadfin Capital, ...
(Date:4/23/2015)... 2015  Propanc Health Group Corporation (OTCBB: PPCH) ... the development of cancer treatments for patients with ... includes PRP, a patented formulation consisting of two ... as the enzyme amylase designed to synergistically enhance ... of anti-cancer agents working in combination with pro-enzymes, ...
(Date:4/22/2015)... -- Sangamo BioSciences, Inc. (NASDAQ: SGMO ) today reported ... For the first quarter ended March 31, 2015, ... or $0.08 per share, compared to a net loss ... same period in 2014. As of March 31, 2015, ... interest receivable of $226.1 million. Revenues for ...
Breaking Biology Technology:U.S.-Russian Innovation Corridor Program Connects Visiting Russian Startups to U.S. Experts 2U.S.-Russian Innovation Corridor Program Connects Visiting Russian Startups to U.S. Experts 3U.S.-Russian Innovation Corridor Program Connects Visiting Russian Startups to U.S. Experts 4Veracyte, Inc. Announces $40 Million Private Placement 2Veracyte, Inc. Announces $40 Million Private Placement 3Veracyte, Inc. Announces $40 Million Private Placement 4Early Stage BioTech offers Plenty of Risk; Propanc Health Group Analyst Brief Issued by BrokerBank Securities, Inc. 2Sangamo BioSciences Reports First Quarter 2015 Financial Results 2Sangamo BioSciences Reports First Quarter 2015 Financial Results 3Sangamo BioSciences Reports First Quarter 2015 Financial Results 4Sangamo BioSciences Reports First Quarter 2015 Financial Results 5Sangamo BioSciences Reports First Quarter 2015 Financial Results 6Sangamo BioSciences Reports First Quarter 2015 Financial Results 7Sangamo BioSciences Reports First Quarter 2015 Financial Results 8
Cached News: