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Neuroergonomic Assessment of Wheelchair Control Using Mobile fNIRS

Joshi, S; Ramirez Herrera, R; Springett, DN; Weedon, BD; Morgado Ramirez, D; Holloway, C; Dawes, H; (2020) Neuroergonomic Assessment of Wheelchair Control Using Mobile fNIRS. IEEE Transactions on Neural Systems and Rehabilitation Engineering , 28 (6) pp. 1488-1496. 10.1109/TNSRE.2020.2992382. Green open access

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For over two centuries, the wheelchair has been one of the most common assistive devices for individuals with locomotor impairments without much modifications. Wheelchair control is a complex motor task that increases both the physical and cognitive workload. New wheelchair interfaces, including Power Assisted devices, can further augment users by reducing the required physical effort, however little is known on the mental effort implications. In this study, we adopted a neuroergonomic approach utilizing mobile and wireless functional near infrared spectroscopy (fNIRS) based brain monitoring of physically active participants. 48 volunteers (30 novice and 18 experienced) self-propelled on a wheelchair with and without a PowerAssist interface in both simple and complex realistic environments. Results indicated that as expected, the complex, more difficult environment led to lower task performance complemented by higher prefrontal cortex activity compared to the simple environment. The use of the PowerAssist feature had significantly lower brain activation compared to traditional manual control only for novices. Expertise led to a lower brain activation pattern within the middle frontal gyrus, complemented by performance metrics that involve lower cognitive workload. Results here confirm the potential of the Neuroergonomic approach and that direct neural activity measures can complement and enhance task performance metrics. We conclude that the cognitive workload benefits of PowerAssist are more directed to new users and difficult settings. The approach demonstrated here can be utilized in future studies to enable greater personalization and understanding of mobility interfaces within real-world dynamic environments.

Type: Article
Title: Neuroergonomic Assessment of Wheelchair Control Using Mobile fNIRS
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/TNSRE.2020.2992382
Publisher version: https://doi.org/10.1109/TNSRE.2020.2992382
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: neuroergonomics, cognitive workload, fucntional near infrared spectroscopy, manual wheelchair, assistive devices, power assist
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science
URI: https://discovery.ucl.ac.uk/id/eprint/10096603
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