Proprioceptive Misestimation of Hand Speed
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866909842227068928 |
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| author | Callaghan, Caitlin Reinkensmeyer, David J |
| author_facet | Callaghan, Caitlin Reinkensmeyer, David J |
| contents | The accuracy with which the human proprioceptive system estimates hand speed is not well understood. To investigate this, we designed an experiment using hobby-grade mechatronics parts and integrated it as a laboratory exercise in a large remote laboratory course. In a simple joint position reproduction task, participants (N = 191) grasped a servomotor-driven shaft with one hand as it followed a randomized trajectory composed of sinusoidal submovements. They simultaneously attempted to reproduce the movement by turning the shaft of a potentiometer with the other hand. Focusing on the first movement of the trajectory, we found that participants consistently overestimated the speed of the slowest rotations by ~45% and underestimated the speed of the fastest rotations also by ~30%. Speed estimation errors were near zero for trajectories with peak velocities ~63 deg/s. Participants' movements also overshot slow trajectories and undershot fast trajectories. We show that these trajectory errors can be explained by a model in which the proprioceptive system integrates velocity misestimates to infer position. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2510_11664 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Proprioceptive Misestimation of Hand Speed Callaghan, Caitlin Reinkensmeyer, David J Neurons and Cognition The accuracy with which the human proprioceptive system estimates hand speed is not well understood. To investigate this, we designed an experiment using hobby-grade mechatronics parts and integrated it as a laboratory exercise in a large remote laboratory course. In a simple joint position reproduction task, participants (N = 191) grasped a servomotor-driven shaft with one hand as it followed a randomized trajectory composed of sinusoidal submovements. They simultaneously attempted to reproduce the movement by turning the shaft of a potentiometer with the other hand. Focusing on the first movement of the trajectory, we found that participants consistently overestimated the speed of the slowest rotations by ~45% and underestimated the speed of the fastest rotations also by ~30%. Speed estimation errors were near zero for trajectories with peak velocities ~63 deg/s. Participants' movements also overshot slow trajectories and undershot fast trajectories. We show that these trajectory errors can be explained by a model in which the proprioceptive system integrates velocity misestimates to infer position. |
| title | Proprioceptive Misestimation of Hand Speed |
| topic | Neurons and Cognition |
| url | https://arxiv.org/abs/2510.11664 |