Evaluating the contributions of muscle activity and joint kinematics to weight perception across multiple joints

Experimental Brain Research
Morgan L Waddell, Eric L Amazeen

Abstract

Perceived heaviness is clearly a function of muscle activity: objects feel heavy, in part because they are lifted with more force than lighter feeling objects. Recent research showed that participants scale their perceptions to the ratio of muscle activity to lift acceleration during elbow lifts (Waddell et al. J Exp Psychol Hum Percept Perform 42:363-374, 2016). The current study sought psychophysiological functions relating perceived heaviness to EMG and peak lift acceleration across multiple lifts employing different muscles as prime movers. Participants lifted objects with three arm lifts-shoulder, elbow, and wrist-and reported perceived heaviness. In each lift, EMG was recorded from the anterior deltoid, biceps brachii, and forearm flexors, and peak angular acceleration was recorded about each joint. The resulting psychophysiological functions revealed the hypothesized ratio of muscle activity to peak lift acceleration in all lifts. Principal component regressions showed that the EMG of the forearm flexors and peak acceleration of the lifting joint were most relevant for perceived heaviness. The special role of forearm flexors in perceiving heaviness across different lifts was interpreted in terms of the invariant structur...Continue Reading

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Citations

Sep 19, 2018·The Quarterly Journal of Experimental Psychology : QJEP·Morgan L Waddell, Eric L Amazeen
Nov 2, 2018·Experimental Brain Research·Madhur MangalamTarkeshwar Singh
Nov 28, 2019·Research Quarterly for Exercise and Sport·Morgan L Waddell, Eric L Amazeen
Dec 13, 2017·Experimental Brain Research·Madhur MangalamKarl M Newell
Apr 1, 2019·Experimental Brain Research·David PhillipsAndrew Karduna
Feb 6, 2021·Experimental Brain Research·Madhur MangalamDamian G Kelty-Stephen
Mar 29, 2020·Human Movement Science·Madhur Mangalam, Damian G Kelty-Stephen

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