Navigation Links
Robotic joystick reveals how brain controls movement

ere asked to keep the joystick centered.

The research team found that after all this pushing in different directions the subjects still were inclined to push the joystick in the first direction, even when the joystick was perfectly centered and not moving. Somehow the brain and muscles in the arm had "learned" this simple movement over the course of the experiment, which took only a few minutes, according to the researchers, showing that sleep is not required for learning such simple movements.

The robot-controlled joystick used in these experiments can measure precisely how hard and in what direction it's being pushed by the hand holding it. Using computer programs, the researchers then were able to apply mathematical equations to these measurements and calculate predictions of how the brain might be "learning" these simple movements.

For example, by taking into account the number of repetitions it took for the subjects to push the joystick in the first direction to keep it centered and how long it took for the subjects to "forget" how hard to push the joystick, the predictions suggest that the brain learns muscle control using at least two different steps.

First, the computer programs were able to tease out that the brain picked up the control task quickly, but actually forgot the task quickly as well. But, at the same time, the brain also was learning the same task more slowly, and that was responsible for the subjects' being able to "remember" the initial joystick-pushing movement.

"Rehab is about training, and you want to be able to train the slow-learning system to be successful," says Shadmehr.

As a next step, the team is interested in uncovering which parts of the brain are responsible for slow-learning. They hope that teasing this system apart will not only improve the understanding of brain function, but also tailor therapy strategies to target slow-learning and increase recovery of muscle control after
'"/>

Source:Johns Hopkins Medical Institutions


Page: 1 2 3

Related biology news :

1. Penn Researchers Use Robotic Surgery
2. Penn Surgeons Use Completely Robotic Surgery to Successfully Treat Prostate Cancer
3. Robotic whiskers can sense three-dimensional environment
4. Robotic therapy helps restore hand use after stroke
5. Robotic exoskeleton replaces muscle work
6. A bacterial genome reveals new targets to combat infectious disease
7. First real-time view of developing neurons reveals surprises, say Stanford researchers
8. Examination of internal wiring of yeast, worm, and fly reveals conserved circuits
9. NYU study reveals how brains immune system fights viral encephalitis
10. Study reveals new technique for fingerprinting environmental samples
11. Study reveals dramatic difference between breast cancers in US and Africa
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Robotic joystick reveals how brain controls movement

(Date:8/22/2014)... Stanford, CAEveryone,s heard of the birds and the ... flowers that are being fertilized. The fertilization process ... extensive communication between the male and female reproductive ... Stanford, Regensburg, Heidelberg, and Munich, and including Carnegie,s ... discoveries in the chemical signaling process that guides ...
(Date:8/21/2014)... study of American singles found that during sex ... orgasm rates. On average, men experience orgasm 85.1 ... making little difference. For women, however, orgasm occurrence ... 62.9 percent of the time during sex with ... with women,s sexual orientation, with lesbian women experiencing ...
(Date:8/21/2014)... Algae might seem easy to ignore, but they are ... animals depend upon. Humans are increasingly dependent on algae, ... atmosphere and sink it to the bottom of the ... and laboratory experiments, researchers have evidence showing that viruses ... the algae,s blooms, even when all else stays essentially ...
Breaking Biology News(10 mins):Calcium and reproduction go together 2Orgasm rates for single women less predictable than men's, vary by sexual orientation 2Orgasm rates for single women less predictable than men's, vary by sexual orientation 3Orgasm rates for single women less predictable than men's, vary by sexual orientation 4Viruses take down massive algal blooms, with big implications for climate 2
... dietary proteins have proven effectiveness thanks to their appetite-suppressing ... Inserm,s Unit 855 "Nutrition and the Brain" in Lyon, ... properties. The researchers describe in detail the chain reactions ... the brain long after a meal. Their results, published ...
... - Atmospheric scientists at the Harvard School of Engineering and ... "bottom-up" estimates of China,s carbon dioxide (CO 2 ) emissions, ... of the uncertainties surrounding China,s CO 2 emissions. ... both at the sources and in the air, may be ...
... new research report published online in the ... cancer, and dependence on breathing machines--microRNA-320a. In the report, ... for helping control glycolysis. Glycolysis is the process of ... some cancers, and contributes to the wasting of unused ...
Cached Biology News:The 'appetite-suppressing' effect of proteins explained 2Atmospheric scientists release first 'bottom-up' estimates of China's CO2 emissions 2Atmospheric scientists release first 'bottom-up' estimates of China's CO2 emissions 3Atmospheric scientists release first 'bottom-up' estimates of China's CO2 emissions 4Stanford scientists find molecule to starve lung cancer and improve ventilator recovery 2
(Date:8/21/2014)... N.Y. , Aug. 21, 2014  BioSpecifics ... biopharmaceutical company developing first in class collagenase-based products ... or CCH) in the U.S. and XIAPEX ® ... significant results from a randomized, double-blind Phase 2a ... cellulite, or edematous fibrosclerotic panniculopathy. The results showed ...
(Date:8/21/2014)... scientists has observed tiny quantum vortices in cold droplets ... Science that the exotic vortices arrange themselves ... the first time that the quantum vortices, which have ... known as superfluid helium, have been detected in nanodroplets. ... Vilesov of the University of Southern California, one of ...
(Date:8/21/2014)... His Majesty Willem-Alexander, King of the Netherlands to ... Majesty Willem-Alexander, King of the Netherlands, has announced that ... Advanced Biofuels’ Project LIBERTY cellulosic ethanol plant in Emmetsburg, ... take part in the Grand Opening Ceremony to perform ... and tour the plant. POET-DSM is a joint venture ...
(Date:8/21/2014)... Mass. , Aug. 21, 2014  Decision ... Brazil and ... The uptake of several newly approved agents, the ... this indication and the launch of emerging biologics ... markets. In particular, the emerging IL-5 inhibitors will ...
Breaking Biology Technology:BioSpecifics Technologies Corp. Announces Positive Data from Phase 2a Study of CCH for Treatment of Cellulite 2BioSpecifics Technologies Corp. Announces Positive Data from Phase 2a Study of CCH for Treatment of Cellulite 3BioSpecifics Technologies Corp. Announces Positive Data from Phase 2a Study of CCH for Treatment of Cellulite 4BioSpecifics Technologies Corp. Announces Positive Data from Phase 2a Study of CCH for Treatment of Cellulite 5Scientists observe quantum vortices in cold helium droplets 2His Majesty Willem-Alexander, King of the Netherlands, to Attend Project LIBERTY opening 2His Majesty Willem-Alexander, King of the Netherlands, to Attend Project LIBERTY opening 3Asthma Agents Currently Face a Suboptimal Coverage Environment in Brazil and Mexico, and as the Treatment Armamentarium Expands, Competitiveness Will Further Intensify 2Asthma Agents Currently Face a Suboptimal Coverage Environment in Brazil and Mexico, and as the Treatment Armamentarium Expands, Competitiveness Will Further Intensify 3
... electrophoresis into an automated, high-throughput operation with ... system is ideal for analyzing multiple PCR ... Fully automated, robot-compatible, and ready to put ... your high-throughput screening assignments as easy as ...
...
Fluorescence Preserving Media, 100 mL...
Size & Applications: 20 ml Storage Temp.: -20C Shelf Life: 12 months ...
Biology Products: