Press Esc to close
Friday 01 August 2014
News updated at 7:18 PM IST
Weather
Max: 28.4°C
Min : 20.2°C
In Bangalore
Cloudy sky

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
Ashish Kumar of India performs during the men's individual floor exercise final in the artistic...

Ashish Kumar of India performs during the men's individual floor exercise final in the artistic...

Rebecca Downie of England performs during the women's gymnastics uneven bars apparatus final at...

Rebecca Downie of England performs during the women's gymnastics uneven bars apparatus final at...

A jumper raises sand during the women's long jump final at Hampden Park Stadium during the...

A jumper raises sand during the women's long jump final at Hampden Park Stadium during the...

Roseline Filion of Canada competes in the women's 10m Platform final at the 2014 Commonwealth...

Roseline Filion of Canada competes in the women's 10m Platform final at the 2014 Commonwealth...

Rasheed Dwyer, centre of Jamaica, leads home a Jamaica 1, 2, 3, with Warren Weir, right, who...

Rasheed Dwyer, centre of Jamaica, leads home a Jamaica 1, 2, 3, with Warren Weir, right, who...

England's David Weir wins the men's para-sport 1500m T54 finals in the athletics competition at...

England's David Weir wins the men's para-sport 1500m T54 finals in the athletics competition at...

Botswana's Nijel Amos wins the men's 800m final in the athletics competition at Hampden Park...

Botswana's Nijel Amos wins the men's 800m final in the athletics competition at Hampden Park...

Indian wrestlers (L-R) Pawan Kumar, Sushil Kumar, Geetika and Yogeshwar Dutt medals at the...

Indian wrestlers (L-R) Pawan Kumar, Sushil Kumar, Geetika and Yogeshwar Dutt medals at the...

India's Pawan Kumar celebrates after winning a bronze medal against Pakistan's Muhammad Inam...

India's Pawan Kumar celebrates after winning a bronze medal against Pakistan's Muhammad Inam...

India's Vikas Shive Gowda poses with his gold medal after the medal ceremony of men's discus...

India's Vikas Shive Gowda poses with his gold medal after the medal ceremony of men's discus...

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