Cited by 88Motor Control and AdaptationMuscle activation and electromyography studiesPhysiological and biochemical adaptations

Scaling of sensorimotor delays in terrestrial mammals

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More, Heather L., Donelan, J. Maxwell·2018·Proceedings of the Royal Society B: Biological Sciences

Abstract

Whether an animal is trying to escape from a predator, avoid a fall or perform a more mundane task, the effectiveness of its sensory feedback is constrained by sensorimotor delays. Here, we combine electrophysiological experiments, systematic reviews of the literature and biophysical models to determine how delays associated with the fastest locomotor reflex scale with size in terrestrial mammals. Nerve conduction delay is one contributor, and increases strongly with animal size. Sensing, synaptic and neuromuscular junction delays also contribute, and we approximate each as a constant value independent of animal size. Muscle's electromechanical and force generation delays increase more moderately with animal size than nerve conduction delay, but their total contribution exceeds that of the four neural delays. The sum of these six component delays, termed total delay, increases with animal size in proportion to M0.21—large mammals experience total delays 17 times longer than small mammals. The slower movement times of large animals mostly offset their long delays resulting in a more modest, but perhaps still significant, doubling of their total delay relative to movement duration when compared with their smaller counterparts. Irrespective of size, sensorimotor delay is likely a challenge for all mammals, particularly during fast running.

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Authors
More, H. L., & Donelan, J. M.
Affiliations
Simon Fraser University (CA)
Corresponding author
Donelan, J. Maxwell
Venue
Proceedings of the Royal Society B: Biological Sciences
Published
2018-08-29
Volume
285
Issue
1885
Pages
20180613
ISSN
  • 0080-4649 (ISSN-L)
  • 0962-8452
  • 1471-2954
OpenAlex
W2888838392
Cited by
88
References
52
Citations by year
2026: 6 · 2025: 11 · 2024: 16 · 2023: 17 · 2022: 9 · 2021: 12 · 2020: 10 · 2019: 6 · 2018: 1
FWCI
4.32
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the Royal Society B Biological Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Motor Control and Adaptation
  • Physical Sciences › Engineering › Biomedical Engineering › Muscle activation and electromyography studies
  • Physical Sciences › Environmental Science › Ecology › Physiological and biochemical adaptations
Keywords
sensorimotor delay, terrestrial mammals, allometry, body size scaling, synaptic delay, movement time, sensory feedback
MeSH terms
Animals, Biomechanical Phenomena, Mammals, Models, Biological, Neural Conduction, Electrophysiological Phenomena, Feedback, Sensory

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