Document Type

Conference Proceeding

Language

eng

Format of Original

4 p.

Publication Date

2011

Publisher

Institute of Electrical and Electronics Engineers

Source Publication

2011 Annual International Conference of the IEEE, Engineering in Medicine and Biology Society, EMBC

Source ISSN

1557-170X

Original Item ID

doi: 10.1109/IEMBS.2011.6092029

Abstract

Stroke often results in both motor and sensory deficits, which may interact in the manifested functional impairment. Proprioception is known to play important roles in the planning and control of limb posture and movement; however, the impact of proprioceptive deficits on motor function has been difficult to elucidate due in part to the qualitative nature of available clinical tests. We present a quantitative and standardized method for evaluating proprioception in tasks directly relevant to those used to assess motor function. Using a robotic manipulandum that exerted controlled displacements of the hand, stroke participants were evaluated, and compared with a control group, in their ability to detect such displacements in a 2-alternative, forced-choice paradigm. A psychometric function parameterized the decision process underlying the detection of the hand displacements. The shape of this function was determined by a signal detection threshold and by the variability of the response about this threshold. Our automatic procedure differentiates between participants with and without proprioceptive deficits and quantifies functional proprioceptive sensation on a magnitude scale that is meaningful for ongoing studies of degraded motor function in comparable horizontal movements.

Comments

Accepted version. Published as part of the proceedings of the conference, 2011 Annual International Conference of the IEEE, Engineering in Medicine and Biology Society, EMBC, 2011: 8227-8230. DOI. © Institute of Electrical and Electronics Engineers 2011. Used with permission.

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