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

Waddell, Morgan L.; Amazeen, Eric L.

doi:10.1007/s00221-017-4979-3

Cited by 12 publications

(3 citation statements)

References 55 publications

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“…This interpretation of exponents in psychophysical functions has been widely used since Stevens (1957, 1960) to explain the relationship between stimuli and perception. These perceptions include heaviness, brightness, loudness, and more (Kornbrot, Penn, Petrie, Furner, & Hardwick, 2007; Osaka, 1980; Stevens & Stevens, 1963; Waddell & Amazeen, 2017; Waddell et al, in press; Ward & Baumann, 2009). In the current set of experiments, our focus is not on how changes in stimuli alone lead to changes in perception, but on physiological changes.…”

Section: Discussionmentioning

confidence: 99%

Lift speed moderates the effects of muscle activity on perceived heaviness

Waddell

Amazeen

2018

Quarterly Journal of Experimental Psychology

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Research has shown that perceived heaviness is a function of the ratio of muscle activity (measured by electromyogram [EMG]) to the resulting acceleration of the object. However, objects will commonly be lifted at different speeds, implying variation in both EMG and acceleration. This study examined the effects of lifting speed by having participants report perceived heaviness for objects lifted by elbow flexion at three different speeds: slow, preferred, and fast. EMG and angular acceleration were recorded during these lifts. Both EMG and angular acceleration changed across lift speed. Nevertheless, despite these variations, perceived heaviness consistently scaled to the ratio of EMG to angular acceleration. The exponents on these parameters suggested that the saliency of muscle activity and movement changed across the three lift speeds.

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Section: Discussionmentioning

confidence: 99%

Lift speed moderates the effects of muscle activity on perceived heaviness

Waddell

Amazeen

2018

Quarterly Journal of Experimental Psychology

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“…The proponents of a rather simple force-effort relationship attest that beyond the linear relation between the force produced and the electromyographic measure of muscle activity demonstrated by [141] during isometric contractions, electromyographic measures are also related to psychological experiences of fatigue, heaviness, and ratings of perceived effort [142][143][144][145][146][147][148]. They recognize muscular activity-specifically the ratio of muscular activity to lifting acceleration [149][150][151][152]-during tasks of dynamic touch [149] as a fundamental factor in perceiving the heaviness of handheld objects, a concept akin to physical/muscular effort. Intuitively, objects feel heavier primarily because they are lifted with greater force than lighter-feeling objects.…”

Section: Misconception #2: Straightforward Relationship Between Emg/m...mentioning

confidence: 99%

Multimodal Embodiment Research of Oral Music Traditions: Electromyography in Oud Performance and Education Research of Persian Art Music

Paschalidou

2024

MTI

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With the recent advent of research focusing on the body’s significance in music, the integration of physiological sensors in the context of empirical methodologies for music has also gained momentum. Given the recognition of covert muscular activity as a strong indicator of musical intentionality and the previously ascertained link between physical effort and various musical aspects, electromyography (EMG)—signals representing muscle activity—has also experienced a noticeable surge. While EMG technologies appear to hold good promise for sensing, capturing, and interpreting the dynamic properties of movement in music, which are considered innately linked to artistic expressive power, they also come with certain challenges, misconceptions, and predispositions. The paper engages in a critical examination regarding the utilisation of muscle force values from EMG sensors as indicators of physical effort and musical activity, particularly focusing on (the intuitively expected link to) sound levels. For this, it resides upon empirical work, namely practical insights drawn from a case study of music performance (Persian instrumental music) in the context of a music class. The findings indicate that muscle force can be explained by a small set of (six) statistically significant acoustic and movement features, the latter captured by a state-of-the-art (full-body inertial) motion capture system. However, no straightforward link to sound levels is evident.

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“…For a task involving a single DOF about a single joint, the sense of effort, which is related to the descending motor commands, is quantified as the torque that one generates in relation to the maximum torque that can voluntarily be produced 3 , 18 . Recent studies used motor activation patterns and kinematic measures as correlates of descending motor commands to demonstrate the influence of central signals on perceiving an external force 24 , 25 and heaviness 26 during multi-DOF tasks. However, how central signals contribute to one’s perception of a self-generated torque during a multi-DOF, multi-joint task remains unknown.…”

Section: Introductionmentioning

confidence: 99%

Accuracy of older adults in judging self-generated elbow torques during multi-joint isometric tasks

Cai

Dewald

Gurari

2020

Sci Rep

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Successful execution of daily activities requires accurate perception of the torques one generates about multiple joints. even so, previous studies are mostly limited to an individual's perception when torques are generated about a single joint. consequently, this study investigates how accurately individuals judge torques at their arm during a multi-joint task. The accuracy of fifteen right-hand dominant participants (age: 60 ± 10 years) in matching isometric elbow torques, within the same arm, was quantified during single-and/or multi-joint tasks. Participants generated and matched elbow torques when the shoulder was: (1) not abducted (single-to-single-joint), (2) abducted (multi-to-multijoint), and (3) abducted and then not abducted (multi-to-single-joint). The constant error for the multito-single-joint condition (dominant: 6.9 ± 5.9 Nm, non-dominant: 6.0 ± 5.5 Nm) was greater than that for the single-to-single-joint condition (dominant: 2.7 ± 3.1 Nm, non-dominant: 3.4 ± 2.8 Nm) (p < 0.001) and multi-to-multi-joint condition (dominant: 3.0 ± 2.8 Nm, non-dominant: 3.9 ± 2.7 Nm) (p < 0.001). The constant error for the multi-to-multi-joint condition did not significantly differ from that of the single-to-single-joint condition (p = 0.780). Findings indicate that in older adults the perception of a self-generated torque during a 2-degree-of-freedom (DOF), multi-joint task is largely influenced by the motor commands associated with the 2-DOF task and is not specific to the DOF at each joint.

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

Cited by 12 publications

References 55 publications

Lift speed moderates the effects of muscle activity on perceived heaviness

Lift speed moderates the effects of muscle activity on perceived heaviness

Multimodal Embodiment Research of Oral Music Traditions: Electromyography in Oud Performance and Education Research of Persian Art Music

Accuracy of older adults in judging self-generated elbow torques during multi-joint isometric tasks

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