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:


(Date:5/24/2016)... 24, 2016 Ampronix facilitates superior patient care by providing unparalleled technology to ... display is the latest premium product recently added to the range of products distributed ... ... ... Imaging- LCD Medical Display- Ampronix News ...
(Date:5/20/2016)...  VoiceIt is excited to announce its new ... By working together, VoiceIt and VoicePass will offer ... take slightly different approaches to voice biometrics, collaboration ... usability. Both ... "This marketing and technology partnership allows ...
(Date:5/16/2016)... , May 16, 2016   EyeLock LLC ... today announced the opening of an IoT Center of ... strengthen and expand the development of embedded iris biometric ... unprecedented level of convenience and security with unmatched biometric ... one,s identity aside from DNA. EyeLock,s platform uses video ...
Breaking Biology News(10 mins):
(Date:5/27/2016)... ... ... NeuMedics Inc. is pleased to announce that CEO Iain Duncan has been invited ... The session begins at 1:10 PM and Iain will present the proof of concept ... topical agent and a treatment for ophthalmic complications of diabetes. , Mr. Duncan will ...
(Date:5/27/2016)... ... 27, 2016 , ... Weeks after hosting a carpal tunnel syndrome workshop with ... surgeon and founder of the Fitzmaurice Hand Institute, has announced the addition of MRI ... state-of-the-art technology and only 1 of about 3 currently available in the United States. ...
(Date:5/27/2016)... ... , ... PBI-Gordon Corporation is pleased to announce Dave Loecke has accepted the ... with PBI-Gordon, Dave has served in a wide variety of roles. His most recent ... launch of many of PBI-Gordon’s most successful products. , “Dave has been essential to ...
(Date:5/27/2016)... ... May 27, 2016 , ... Doctors in Italy, Japan, the UK and ... BRCA-1 associated protein (BAP1) gene and its link to malignant mesothelioma. Surviving Mesothelioma has ... read the full article now. , The studies analyzed for the new report ...
Breaking Biology Technology:
Cached News: