Skip to main content
Log in

Proprioceptive afferents differentially contribute to effortful perception of object heaviness and length

  • Research Article
  • Published:
Experimental Brain Research Aims and scope Submit manuscript

Abstract

When humans handle a tool, such as a tennis racket or hammer, for the first time, they often wield it to determine its inertial properties. The mechanisms that contribute to perception of inertial properties are not fully understood. The present study’s goal was to investigate how proprioceptive afferents contribute to effortful perception of heaviness and length of a manually wielded object in the absence of vision. Blindfolded participants manually wielded specially designed objects with different mass, the static moment, and the moment of inertia at different wrist angles and angular kinematics. These manipulations elicited different tonic and rhythmic activity levels in the muscle spindles of the wrist, allowing us to relate differences in muscle activity to perceptual judgments of heaviness and length. Perception of heaviness and length depended on an object’s static moment and the moment of inertia, respectively. Manipulations of wrist angle and angular kinematics affected perceived heaviness and length in distinct ways. Ulnar deviation resulted in an object being perceived heavier but shorter. Compared to static holding, wielding the object resulted in it being perceived heavier but wielding did not affect perceived length. These results suggest that proprioceptive afferents differentially contribute to effortful perception of object heaviness and length. Critically, the role of afferent is specific to the mechanical variable used to derive a given object property. These findings open a new possibility of studies on the link between physiology, and different mechanical variables picked up by the perceptual system.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3

Similar content being viewed by others

References

Download references

Author information

Authors and Affiliations

Authors

Contributions

MM conceived and designed research; MM performed experiments; MM and ND analyzed data; MM, ND, and DGK-S interpreted results of experiments; MM prepared figures; MM drafted manuscript; MM, ND, and DGK-S edited and revised manuscript; MM, ND, and DGK-S approved final version of manuscript.

Corresponding author

Correspondence to Madhur Mangalam.

Ethics declarations

Conflict of interest

The authors declare that no competing interests exist.

Additional information

Communicated by Melvyn A. Goodale.

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Mangalam, M., Desai, N. & Kelty-Stephen, D.G. Proprioceptive afferents differentially contribute to effortful perception of object heaviness and length. Exp Brain Res 239, 1085–1098 (2021). https://doi.org/10.1007/s00221-021-06045-4

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00221-021-06045-4

Keywords

Navigation