Gaze and Movement Assessment (GaMA): Inter-site validation of a visuomotor upper limb functional protocol

Autoři: Heather E. Williams aff001;  Craig S. Chapman aff002;  Patrick M. Pilarski aff003;  Albert H. Vette aff001;  Jacqueline S. Hebert aff003
Působiště autorů: Department of Mechanical Engineering, Faculty of Engineering, University of Alberta, Edmonton, Alberta, Canada aff001;  Faculty of Kinesiology, Sport, and Recreation, University of Alberta, Edmonton, Alberta, Canada aff002;  Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada aff003;  Department of Biomedical Engineering, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada aff004;  Glenrose Rehabilitation Hospital, Alberta Health Services, Edmonton, Alberta, Canada aff005
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article
doi: 10.1371/journal.pone.0219333



Successful hand-object interactions require precise hand-eye coordination with continual movement adjustments. Quantitative measurement of this visuomotor behaviour could provide valuable insight into upper limb impairments. The Gaze and Movement Assessment (GaMA) was developed to provide protocols for simultaneous motion capture and eye tracking during the administration of two functional tasks, along with data analysis methods to generate standard measures of visuomotor behaviour. The objective of this study was to investigate the reproducibility of the GaMA protocol across two independent groups of non-disabled participants, with different raters using different motion capture and eye tracking technology.


Twenty non-disabled adults performed the Pasta Box Task and the Cup Transfer Task. Upper body and eye movements were recorded using motion capture and eye tracking, respectively. Measures of hand movement, angular joint kinematics, and eye gaze were compared to those from a different sample of twenty non-disabled adults who had previously performed the same protocol with different technology, rater and site.


Participants took longer to perform the tasks versus those from the earlier study, although the relative time of each movement phase was similar. Measures that were dissimilar between the groups included hand distances travelled, hand trajectories, number of movement units, eye latencies, and peak angular velocities. Similarities included all hand velocity and grip aperture measures, eye fixations, and most peak joint angle and range of motion measures.


The reproducibility of GaMA was confirmed by this study, despite a few differences introduced by learning effects, task demonstration variation, and limitations of the kinematic model. GaMA accurately quantifies the typical behaviours of a non-disabled population, producing precise quantitative measures of hand function, trunk and angular joint kinematics, and associated visuomotor behaviour. This work advances the consideration for use of GaMA in populations with upper limb sensorimotor impairment.

Klíčová slova:

Eye movements – Eyes – Kinematics – Musculoskeletal system – Skeletal joints


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Článek vyšel v časopise


2019 Číslo 12