Navigation Links
A better thought-controlled computer cursor
Date:11/18/2012

trode sensors and sends data to a computer. The frequency with which action potentials are generated provides the computer key information about the direction and speed of the user's intended movement.

The ReFIT algorithm that decodes these signals represents a departure from earlier models. In most neural prosthetics research, scientists have recorded brain activity while the subject moves or imagines moving an arm, analyzing the data after the fact. "Quite a bit of the work in neural prosthetics has focused on this sort of offline reconstruction," said Gilja, the first author of the paper.

The Stanford team wanted to understand how the system worked "online," under closed-loop control conditions in which the computer analyzes and implements visual feedback gathered in real time as the monkey neurally controls the cursor to toward an onscreen target.

The system is able to make adjustments on the fly when while guiding the cursor to a target, just as a hand and eye would work in tandem to move a mouse-cursor onto an icon on a computer desktop. If the cursor were straying too far to the left, for instance, the user likely adjusts their imagined movements to redirect the cursor to the right. The team designed the system to learn from the user's corrective movements, allowing the cursor to move more precisely than it could in earlier prosthetics.

To test the new system, the team gave monkeys the task of mentally directing a cursor to a target an onscreen dot and holding the cursor there for half a second. ReFIT performed vastly better than previous technology in terms of both speed and accuracy. The path of the cursor from the starting point to the target was straighter and it reached the target twice as quickly as earlier systems, achieving 75 to 85 percent of the speed of real arms.

"This paper reports very exciting innovations in closed-loop decoding for brain-machine interfaces. These innovations should lead to a s
'/>"/>

Contact: Andrew Myers
admyers@stanford.edu
650-736-2245
Stanford School of Engineering
Source:Eurekalert  

Page: 1 2 3 4 5

Related biology news :

1. New methods for better purification of wastewater
2. Breakthroughs in Chikungunya research from A*STAR spell new hope for better treatment and protection
3. UNH researchers find African farmers need better climate change data to improve farming practices
4. Giant squids giant eyes: The better to see hungry whales with
5. Improved loblolly pines better for the environment, study finds
6. Fish larvae find the reef by orienting: The earlier the better
7. Intensive kidney dialysis indicates better survival rates than conventional dialysis
8. Modern hybrid corn makes better use of nitrogen, study shows
9. Bigger gorillas better at attracting mates and raising young
10. Better housing conditions for zebrafish could improve research results
11. Better plants for biofuels
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
A better thought-controlled computer cursor
(Date:8/28/2014)... August 28, 2014 Dyslexia, the most commonly ... a neurological reading disability that occurs when the ... don,t function normally. , The use of non-invasive ... activity is disrupted in dyslexia. However, most prior ... of brain regions, leaving a gap in our ...
(Date:8/28/2014)... in homes could pose a significant health risk to people ... Journal of Allergy and Clinical Immunology . , By ... countries, the research has found that the presence of several ... sufferers, as well as increasing the likelihood of developing the ... at the University of Exeter Medical School and is the ...
(Date:8/28/2014)... Protected areas conserve biodiversity and more action is needed ... areas, researchers say. , Published in PLOS ONE ... University of Exeter, used meta-analysis - combining results from ... years of research into these areas, to determine whether ... School of Biological Sciences, said protecting an area from ...
Breaking Biology News(10 mins):Dyslexic readers have disrupted network connections in the brain 2Indoor mold poses health risk to asthma sufferers 2Protected areas proven to protect biodiversity 2
... nuclear waste and the possibility of it leaching into ... be obstacles on the road to cleaner energy. , ... Notre Dame, led by Thomas E. Albrecht-Schmitt, professor of ... chemistry and biochemistry, showcases Notre Dame Thorium Borate-1 (NDTB-1) ...
... RIVERSIDE, Calif. Most of our serious problems in the world ... on the environment. With each person requiring energy, space and ... population, currently estimated to be seven billion, is enormous. ... University of California, Riverside, will give a free public lecture on ...
... Institute and the University of Melbourne have identified a ... It is hoped the test would be more cost ... of peanut allergy in the community. ... diagnosing peanut allergy, and while an oral food challenge ...
Cached Biology News:New paper by Notre Dame researchers describes method for cleaning up nuclear waste 2Is Earth overpopulated? 2Test to improve peanut allergy diagnosis 2
(Date:8/27/2014)... 27, 2014  A novel biomarker for rheumatoid ... better identify early-stage disease, when treatment can often ... a new study in The Journal of Rheumatology. ... DGX ) and other institutions found that ... conventional antibody-serum testing, including rheumatoid factor (RF) and ...
(Date:8/27/2014)... Aug. 27, 2014 Guggenheim Securities, the investment ... announced the hiring of veteran equity analyst Charles "Tony" ... Mr. Butler will focus on the biotech/biopharma sector. ... wealth of experience and a broad network of relationships ... Managing Director and Head of Equities at Guggenheim Securities. ...
(Date:8/27/2014)... CO (PRWEB) August 27, 2014 Flagship ... analysis services to the pharmaceutical and medical device ... expansion. The fast growing company has consolidated its ... Aurora and Boulder to Westminster, CO, just north of ... Histology Lab, 7575 W. 103rd Ave., Suite 100, Westminster, ...
(Date:8/27/2014)... -- Research and Markets  has announced the addition ... Industry Report 2014" report to their offering. ... Industry Report 2014 is a professional and in-depth study ... mass spectrometer industry. The report provides a ... and industry chain structure. The isotope ratio mass spectrometer ...
Breaking Biology Technology:Novel Biomarker Detects Early Rheumatoid Arthritis Better than Conventional Methods Alone, According to Journal of Rheumatology Study 2Novel Biomarker Detects Early Rheumatoid Arthritis Better than Conventional Methods Alone, According to Journal of Rheumatology Study 3Novel Biomarker Detects Early Rheumatoid Arthritis Better than Conventional Methods Alone, According to Journal of Rheumatology Study 4Guggenheim Securities Hires Analyst Charles "Tony" Butler to Expand Healthcare Coverage 2Flagship Biosciences Announces Relocation and Expansion 2Global Stable Isotope Ratio Mass Spectrometer Industry Report 2014 2
... now knows about Hwang Woo-suk, the South Korean researcher ... was a confidence-shaking revelation for some who support human ... for those who do not. , ,If theres ... South Korea, it is the contrast with how stem ...
... of Wisconsin-Madison master's degree, Bob Aloisi didn't just earn ... saved his company $50,000. , ,It wasn't the typical ... a student in "Quality Engineering and Quality Management," Aloisi ... own workplace. , ,The project is the capstone experience ...
... Wis. — QBI Life Sciences said ... Health and formed partnerships with UW-Madison and the University ... ,QBI, a division of Quintessence Biosciences Inc. in Madison, ... of potentially harmful interactions between different drugs given to ...
Cached Biology Technology:Stem cell breakthrough by UW shows why federal research should be broadened 2Stem cell breakthrough by UW shows why federal research should be broadened 3Classroom projects translate into immediate workplace gains 2Classroom projects translate into immediate workplace gains 3Classroom projects translate into immediate workplace gains 4Classroom projects translate into immediate workplace gains 5
... c-Jun N-terminal kinase (JNK) is one of ... luciferase has been used as a sensitive ... Luciferase provides a 1000-fold increase in sensitivity ... (CAT) assay. Firefly luciferase catalyzes the oxidative ...
... number is a new product ... Cornings product number. If showing ... under the old Sigma-Aldrich number ... for assistance. ID clarifier: filling ...
... Linkage: This CLS number is ... to easily match Cornings product ... yet, please order under the ... contact customer service for assistance. ...
... DMEM and harvested at the log phase of ... in their native forms, cells were fixed in ... 12-well (5 mm) adhesive coated slide, with each ... and to minimize background staining. Each well ...
Biology Products: