Neural point-and-click communication by a person with incomplete locked-in syndrome

Neurorehabil Neural Repair, 2015 · DOI: 10.1177/1545968314554624 · Published: June 1, 2015

Assistive Technology Neurology Neurorehabilitation

Simple Explanation

This study explores using a brain-computer interface (BCI) to help someone with severe paralysis communicate. The participant used neural signals to control a cursor and type on virtual keyboards. A new keyboard design, the Radial Keyboard, was tested and found to be more efficient than a standard QWERTY keyboard for this purpose.

Study Duration

Not specified

Participants

One woman, 58 years old, with tetraplegia and anarthria

Evidence Level

Not specified

Key Findings

1
The participant achieved typing rates over 10 correct characters per minute using the Radial Keyboard.
2
The Radial Keyboard showed significantly higher accuracy and speed compared to the QWERTY keyboard in copy-spelling tasks.
3
The participant was able to use the BCI system with the QWERTY keyboard to conduct a real-time internet chat conversation.

Research Summary

This study demonstrates the use of an intracortical BCI for communication by an individual with incomplete locked-in syndrome, achieving typing rates over 10 correct characters per minute. A novel Radial Keyboard interface was developed and tested, showing significant improvements in typing accuracy and speed compared to a standard QWERTY keyboard. The participant was also able to use the interface for real-time communication, demonstrating the flexibility of the system for use with native computer applications.

Practical Implications

Improved Communication for Locked-In Syndrome

The study provides a potentially more effective means of communication for individuals with severe paralysis and anarthria, enhancing their ability to interact with others.

Optimized BCI Keyboard Design

The Radial Keyboard design offers insights into creating more efficient and user-friendly interfaces for BCI-based communication systems.

Real-World Application of BCI Technology

The demonstration of real-time internet chat and text-to-speech communication highlights the potential for BCI systems to integrate with everyday computer applications.

Study Limitations

1
The study involved only one participant, limiting the generalizability of the findings.
2
The word prediction algorithm used in the system was rudimentary, based on a relatively small dictionary.
3
The "quick fox" phrase doesn't necessarily represent commonplace language.

Your Feedback

Was this summary helpful?

Back to Assistive Technology