Correlations between sensory-motor functions and motor performance measured by optoelectronic kinesiology in 75-year-olds

Abstract

The motor performance in an everyday motor task, lifting an object from the floor and placing it on a shelf - the Posturo-Locomotor-Manual test (PLM test) - was recorded using optoelectronic kinesiology in 150 subjects within a broader study measuring functional capacity in 75-year-olds (the NORA 75 study). The results were correlated in all persons to tests for isometric muscle strength, visual acuity, postural balance, vibrotactile threshold, reaction time, pulmonary function and maximal walking speed. The PLM test performance correlated well with the isometric muscle strength measurements in men and strong individuals were consequently faster than weaker persons. A moderate correlation was found with pulmonary function in men. The association between the PLM test parameters and muscle strength was poor in women. Subjects with slower psychomotor and walking speed moved significantly slower in the PLM test in both sexes. No association was found with visual acuity, postural balance or vibrotactile threshold. The PLM test might be used to identify individuals at risk of disability caused by decline in muscle strength.

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