Press Esc to close
Tuesday 01 September 2015
News updated at 3:52 AM IST
Weather
Max: 29.4°C
Min : 21.1°C
In Bengaluru
Sunny day

Control the computer cursor with your thoughts

Washington, Nov 19, 2012, PTI:

Researchers led by Indian-origin scientists claim to have designed the fastest and most accurate mathematical algorithm yet that can help disabled people manoeuvre computer cursors with their thoughts.

The algorithm’s speed, accuracy and natural movement approach those of a real arm, researchers claim.

Stanford researchers have developed the algorithm for brain-implantable prosthetic systems, known as ReFIT, that vastly improves the speed and accuracy of neural prosthetics that control computer cursors. In demonstrations with rhesus monkeys, cursors controlled by the new algorithm doubled the performance of existing systems and approached performance of the monkey’s actual arm in controlling the cursor.

“These findings could lead to greatly improved prosthetic system performance and robustness in paralysed people, which we are actively pursuing as part of the FDA Phase-I BrainGate2 clinical trial here at Stanford,” said researcher Krishna Shenoy, a professor at Stanford.

The system relies on a sensor implanted into the brain, which records “action potentials” in neural activity from an array of electrode sensors and sends data to a computer.

The frequency with which action potentials are generated provides the computer important 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, analysing the data after the fact.

“Quite a bit of the work in neural prosthetics has focused on this sort of offline reconstruction,” said Dr Vikash Gilja, the first author of the study, in a statement.
The system is able to make adjustments on the fly when 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 the imagined movements to redirect the cursor to the right.

The study was published in the journal Nature Neuroscience.


Go to Top

Photo Gallery
Eunuchs carry wheat saplings on their heads during a procession taken out to celebrate Bhujaria  ...

Eunuchs carry wheat saplings on their heads during a procession taken out to celebrate Bhujaria ...

Local members of Shiv Sena and Dogra Front carrying onions to mark protest against price hike of ...

Local members of Shiv Sena and Dogra Front carrying onions to mark protest against price hike of ...

Kannada actor Shivarajkumar and Geetha daughter Nirupama with Dileep weeding at Tripuravasini  ...

Kannada actor Shivarajkumar and Geetha daughter Nirupama with Dileep weeding at Tripuravasini ...

Members of Yuva Bharath organisation launch a postcard campaign demanding conduct of Dasara in a ...

Members of Yuva Bharath organisation launch a postcard campaign demanding conduct of Dasara in a ...

Rayat panel supporters celeberate the win in the Agricultural Produce Market Committee (APMC) ...

Rayat panel supporters celeberate the win in the Agricultural Produce Market Committee (APMC) ...

A large number of Karnataka Association of Resident Doctors (KARD) members staged protest ...

A large number of Karnataka Association of Resident Doctors (KARD) members staged protest ...

Bollywood Actors Anil Kapoor, John Abraham and Shruti Haasan during promotion of their upcoming ...

Bollywood Actors Anil Kapoor, John Abraham and Shruti Haasan during promotion of their upcoming ...

President Pranab Mukherjee speaking to contributors to the book- '30 Women in Power: Their Voice ...

President Pranab Mukherjee speaking to contributors to the book- '30 Women in Power: Their Voice ...

AIMIM President Asaduddin Owaisi along with others offering tribute to former AIMIM president ...

AIMIM President Asaduddin Owaisi along with others offering tribute to former AIMIM president ...

Police personnel sitting near the charred remains of a motorcyle near the violence-hit Trahi ...

Police personnel sitting near the charred remains of a motorcyle near the violence-hit Trahi ...

Copyright 2014, The Printers (Mysore) Private Ltd., 75, M.G Road, Post Box 5331, Bengaluru - 560001
Tel: +91 (80) 25880000 Fax No. +91 (80) 25880523