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Proceedings Paper

Robot-assisted motor activation monitored by time-domain optical brain imaging
Author(s): O. Steinkellner; H. Wabnitz; S. Schmid; R. Steingräber; H. Schmidt; J. Krüger; R. Macdonald
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Paper Abstract

Robot-assisted motor rehabilitation proved to be an effective supplement to conventional hand-to-hand therapy in stroke patients. In order to analyze and understand motor learning and performance during rehabilitation it is desirable to develop a monitor to provide objective measures of the corresponding brain activity at the rehabilitation progress. We used a portable time-domain near-infrared reflectometer to monitor the hemodynamic brain response to distal upper extremity activities. Four healthy volunteers performed two different robot-assisted wrist/forearm movements, flexion-extension and pronation-supination in comparison with an unassisted squeeze ball exercise. A special headgear with four optical measurement positions to include parts of the pre- and postcentral gyrus provided a good overlap with the expected activation areas. Data analysis based on variance of time-of-flight distributions of photons through tissue was chosen to provide a suitable representation of intracerebral signals. In all subjects several of the four detection channels showed a response. In some cases indications were found of differences in localization of the activated areas for the various tasks.

Paper Details

Date Published: 14 June 2011
PDF: 8 pages
Proc. SPIE 8088, Diffuse Optical Imaging III, 808807 (14 June 2011); doi: 10.1117/12.889505
Show Author Affiliations
O. Steinkellner, Physikalisch-Technische Bundesanstalt (Germany)
H. Wabnitz, Physikalisch-Technische Bundesanstalt (Germany)
S. Schmid, Technische Univ. Berlin (Germany)
R. Steingräber, Technische Univ. Berlin (Germany)
H. Schmidt, Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik (Germany)
J. Krüger, Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik (Germany)
R. Macdonald, Physikalisch-Technische Bundesanstalt (Germany)

Published in SPIE Proceedings Vol. 8088:
Diffuse Optical Imaging III
Andreas H. Hielscher; Paola Taroni, Editor(s)

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