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Tracking and analysis of human head motion during Guided fMRI motor tasks


Yu, N; Hollnagel, C; Wolf, P; Murr, W; Blickenstorfer, A; Kollias, S; Riener, R (2009). Tracking and analysis of human head motion during Guided fMRI motor tasks. In: 11th International Conference on Rehabilitation Robotics (ICORR) 2009, Kyoto (Japan), 23 June 2009 - 26 June 2009, 588.

Abstract

In this work, we studied human head motions during upper extremity motor task, conducted in functional magnetic resonance imaging (fMRI) studies. The experiments were performed on a mock up of the MRI bench. Three kinds of linear movements in the caudal-cranial, left-right and anterior-posterior directions, a reaching movement as well as single joint movements at shoulder, elbow and wrist, were investigated at three different speeds with the right arm. Optical markers tracked by a high-precision motion tracking system were used to detect head and arm movements. For each task, the head moved principally in the direction of right-caudal-posterior to left-cranial-anterior, parallel to the line from the right shoulder joint to the head. No principal rotation axis was observed. The translational and rotational head motions were 1.7 ~ 8.4 mm and 0.15deg ~ 0.96deg, respectively. We then applied a special head fixation to stabilize the head, and repeated all the experiments. The translational and rotational head motions were significantly suppressed by 78% and 73%, to the range of 0.3 ~ 2.4 mm and 0.04deg ~ 0.39deg.

Abstract

In this work, we studied human head motions during upper extremity motor task, conducted in functional magnetic resonance imaging (fMRI) studies. The experiments were performed on a mock up of the MRI bench. Three kinds of linear movements in the caudal-cranial, left-right and anterior-posterior directions, a reaching movement as well as single joint movements at shoulder, elbow and wrist, were investigated at three different speeds with the right arm. Optical markers tracked by a high-precision motion tracking system were used to detect head and arm movements. For each task, the head moved principally in the direction of right-caudal-posterior to left-cranial-anterior, parallel to the line from the right shoulder joint to the head. No principal rotation axis was observed. The translational and rotational head motions were 1.7 ~ 8.4 mm and 0.15deg ~ 0.96deg, respectively. We then applied a special head fixation to stabilize the head, and repeated all the experiments. The translational and rotational head motions were significantly suppressed by 78% and 73%, to the range of 0.3 ~ 2.4 mm and 0.04deg ~ 0.39deg.

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Additional indexing

Item Type:Conference or Workshop Item (Paper), refereed, original work
Communities & Collections:04 Faculty of Medicine > Balgrist University Hospital, Swiss Spinal Cord Injury Center
Dewey Decimal Classification:610 Medicine & health
Event End Date:26 June 2009
Deposited On:28 Feb 2010 15:08
Last Modified:07 Dec 2017 00:01
ISBN:978-1-4244-3788-7
Publisher DOI:https://doi.org/10.1109/ICORR.2009.5209613

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