Press Esc to close
Thursday 28 August 2014
News updated at 2:51 AM IST
Weather
Max: 24.4°C
Min : 20.1°C
In Bangalore
Generally cloudy

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
Abhishek Bachchan posing next to the Pro Kabbadi League trophy in Bengaluru ...

Abhishek Bachchan posing next to the Pro Kabbadi League trophy in Bengaluru ...

Imran Khan  supporter waves national and party flags during what has been dubbed a 'freedom march ..

Imran Khan supporter waves national and party flags during what has been dubbed a 'freedom march ..

England's Ben Stokes fails to get to a catch during the second ODI against India ...

England's Ben Stokes fails to get to a catch during the second ODI against India ...

Narendra Modi in a meeting with President of Asian Development Bank, Takehiko Nakao in New Delhi ...

Narendra Modi in a meeting with President of Asian Development Bank, Takehiko Nakao in New Delhi ...

Family members mourn during cremation procession of Lance Naik Dhananjay Kumar who was killed ...

Family members mourn during cremation procession of Lance Naik Dhananjay Kumar who was killed ...

Crowd during cremation procession of Lance Naik Dhananjay Kumar who was killed in an encounter ...

Crowd during cremation procession of Lance Naik Dhananjay Kumar who was killed in an encounter ...

Britain's Deputy PM Nick Clegg during the inauguration of the United Kingdom India Business ...

Britain's Deputy PM Nick Clegg during the inauguration of the United Kingdom India Business ...

Dhoni is bowled by England's Chris Woakes during their second one-day international cricket match ..

Dhoni is bowled by England's Chris Woakes during their second one-day international cricket match ..

MS Dhoni bails fly as he is clean bowled by England's Chris Jordan ...

MS Dhoni bails fly as he is clean bowled by England's Chris Jordan ...

A Lord Ganesha idol decorated with 'Laddus at famous Moti Doongari temple in Jaipur ...

A Lord Ganesha idol decorated with 'Laddus at famous Moti Doongari temple in Jaipur ...

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