Stepping onto the unknown: reflexes of the foot and ankle while stepping with perturbed perceptions of terrain
dc.contributor.author | Riddick, RC | |
dc.contributor.author | Farris, DJ | |
dc.contributor.author | Cresswell, AG | |
dc.contributor.author | Kuo, AD | |
dc.contributor.author | Kelly, LA | |
dc.date.accessioned | 2021-03-02T08:37:47Z | |
dc.date.issued | 2021-03-10 | |
dc.description.abstract | Unanticipated variations in terrain can destabilize the body. The foot is the primary interface with the ground and we know that cutaneous reflexes provide important sensory feedback. However, little is known about the contribution of stretch reflexes from the muscles within the foot to upright stability. We used intramuscular electromyography measurements of the foot muscles flexor digitorum brevis (FDB) and abductor hallucis (AH) to show for the first time how their short latency stretch reflex response (SLR) may play an important role in responding to stepping perturbations. The SLR of FDB and AH was highest for downwards steps and lowest for upwards steps, with the response amplitude for level and compliant steps in between. When the type of terrain was unknown or unexpected to the participant, the SLR of AH and the ankle muscle soleus tended to decrease. We found significant relationships between the contact kinematics and forces of the leg and the SLR, but a person’s expectation still had significant effects even after accounting for these relationships. Motor control models of short latency body stabilization should not only include local muscle dynamics, but also predictions of terrain based on higher-level information such as from vision or memory. | en_GB |
dc.identifier.citation | Vol. 18 (176), article 20210061 | en_GB |
dc.identifier.doi | 10.1098/rsif.2021.0061 | |
dc.identifier.uri | http://hdl.handle.net/10871/124970 | |
dc.language.iso | en | en_GB |
dc.publisher | Royal Society | en_GB |
dc.relation.url | https://doi.org/10.6084/m9.figshare.12986223 | en_GB |
dc.rights | © 2021. This version is made available under the CC-BY 4.0 license: https://creativecommons.org/licenses/by/4.0/ | en_GB |
dc.subject | Intrinsic foot muscles | en_GB |
dc.subject | reflex | en_GB |
dc.subject | short latency response | en_GB |
dc.subject | terrain | en_GB |
dc.subject | perturbation | en_GB |
dc.subject | stepping | en_GB |
dc.title | Stepping onto the unknown: reflexes of the foot and ankle while stepping with perturbed perceptions of terrain | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2021-03-02T08:37:47Z | |
dc.identifier.issn | 1742-5662 | |
dc.description | This is the author accepted manuscript. The final version is available from the Royal Society via e the DOI in this record | en_GB |
dc.description | Data availability: The data from this study and the code to generate the figures and statistics are publically available at 10.6084/m9.figshare.12986223 | en_GB |
dc.identifier.journal | Journal of the Royal Society Interface | en_GB |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2021-02-17 | |
rioxxterms.version | AM | en_GB |
rioxxterms.licenseref.startdate | 2021-02-17 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2021-03-01T13:30:27Z | |
refterms.versionFCD | AM | |
refterms.dateFOA | 2021-03-11T10:32:43Z | |
refterms.panel | C | en_GB |
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Except where otherwise noted, this item's licence is described as © 2021. This version is made available under the CC-BY 4.0 license: https://creativecommons.org/licenses/by/4.0/