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Center Of Mass Trajectory In Lower Extremity During Simulated Ankle Sprain.

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Title: Center Of Mass Trajectory In Lower Extremity During Simulated Ankle Sprain.
Authors: Fassett, Zach L.1, Jagodinsky, Adam E.1, Schempp, Emilia G.1, Carroll, Erin M.1, Krause, Jennifer L.1, Salvadore, Abigail K.1, Stanek, Justin M.1
Source: Medicine & Science in Sports & Exercise. 2021 Supplement, Vol. 53 Issue 8S, p137-137. 1/3p.
Subject Terms: *Conferences & conventions, Sprain prevention, Gait in humans, Ankle injuries, Leg, Diagnosis, Biomechanics
Abstract: In accordance with the inverted pendulum model, center of mass (CoM) trajectories provide an indication of postural stability during gait. However, there is little research quantifying the CoM trajectory following perturbation of the ankle during gait. An understanding of CoM positioning in response to sudden dynamic ankle perturbation could be beneficial to elucidating ankle injury avoidance strategies. PURPOSE: Compare post heel strike CoM trajectories across perturbed and normal gait conditions. METHODS: Eleven healthy volunteers walked along a walkway embedded with two trapdoors that elicit sudden inversion, or inversion and plantarflexion. Participants performed trials of walking gait during normal (NW), inversion (INV), and inversion/plantarflexion perturbation (PF) conditions. Lower extremity trajectories were collected and used to estimate the lower extremity model CoM location. Mediolateral and anteroposterior displacement and total path were calculated within a 200ms post heel strike window. Repeated measures ANOVAs were employed to assess differences in COM trajectory across conditions. RESULTS: No significances were observed for center of mass trajectory for both total displacement [INV (0.0186±0.0035m), PF (0.015±0.005m), NW (0.017±0.0058m)] or total mediolateral distance [INV (0.0188±0.003m), PF (0.0175±0.006m), NW (0.0175±0.005m)], as well as total displacement [INV (0.187±0.02m), PF (0.165±0.049m), NW(0.187±0.018m)] or anteroposterior total distance [INV (0.187±0.023m), PF (0.194m±0.056m), NW (0.19±0.018m)]. CONCLUSIONS: Significant differences in CoM trajectories were not observed across conditions, which may indicate a sufficient neuromuscular response during perturbation trials to normalize CoM trajectories. Alternatively, the perturbations may not have been strong enough to invoke differences in CoM trajectory across conditions. Future studies should explore measures of neuromuscular control that could explain CoM behavior in response to sudden ankle perturbations. [ABSTRACT FROM AUTHOR]
Copyright of Medicine & Science in Sports & Exercise is the property of Lippincott Williams & Wilkins and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Center Of Mass Trajectory In Lower Extremity During Simulated Ankle Sprain.
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  Data: <searchLink fieldCode="AR" term="%22Fassett%2C+Zach+L%2E%22">Fassett, Zach L.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Jagodinsky%2C+Adam+E%2E%22">Jagodinsky, Adam E.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Schempp%2C+Emilia+G%2E%22">Schempp, Emilia G.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Carroll%2C+Erin+M%2E%22">Carroll, Erin M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Krause%2C+Jennifer+L%2E%22">Krause, Jennifer L.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Salvadore%2C+Abigail+K%2E%22">Salvadore, Abigail K.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Stanek%2C+Justin+M%2E%22">Stanek, Justin M.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Medicine+%26+Science+in+Sports+%26+Exercise%22">Medicine & Science in Sports & Exercise</searchLink>. 2021 Supplement, Vol. 53 Issue 8S, p137-137. 1/3p.
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  Data: *<searchLink fieldCode="DE" term="%22Conferences+%26+conventions%22">Conferences & conventions</searchLink><br /><searchLink fieldCode="DE" term="%22Sprain+prevention%22">Sprain prevention</searchLink><br /><searchLink fieldCode="DE" term="%22Gait+in+humans%22">Gait in humans</searchLink><br /><searchLink fieldCode="DE" term="%22Ankle+injuries%22">Ankle injuries</searchLink><br /><searchLink fieldCode="DE" term="%22Leg%22">Leg</searchLink><br /><searchLink fieldCode="DE" term="%22Diagnosis%22">Diagnosis</searchLink><br /><searchLink fieldCode="DE" term="%22Biomechanics%22">Biomechanics</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In accordance with the inverted pendulum model, center of mass (CoM) trajectories provide an indication of postural stability during gait. However, there is little research quantifying the CoM trajectory following perturbation of the ankle during gait. An understanding of CoM positioning in response to sudden dynamic ankle perturbation could be beneficial to elucidating ankle injury avoidance strategies. PURPOSE: Compare post heel strike CoM trajectories across perturbed and normal gait conditions. METHODS: Eleven healthy volunteers walked along a walkway embedded with two trapdoors that elicit sudden inversion, or inversion and plantarflexion. Participants performed trials of walking gait during normal (NW), inversion (INV), and inversion/plantarflexion perturbation (PF) conditions. Lower extremity trajectories were collected and used to estimate the lower extremity model CoM location. Mediolateral and anteroposterior displacement and total path were calculated within a 200ms post heel strike window. Repeated measures ANOVAs were employed to assess differences in COM trajectory across conditions. RESULTS: No significances were observed for center of mass trajectory for both total displacement [INV (0.0186±0.0035m), PF (0.015±0.005m), NW (0.017±0.0058m)] or total mediolateral distance [INV (0.0188±0.003m), PF (0.0175±0.006m), NW (0.0175±0.005m)], as well as total displacement [INV (0.187±0.02m), PF (0.165±0.049m), NW(0.187±0.018m)] or anteroposterior total distance [INV (0.187±0.023m), PF (0.194m±0.056m), NW (0.19±0.018m)]. CONCLUSIONS: Significant differences in CoM trajectories were not observed across conditions, which may indicate a sufficient neuromuscular response during perturbation trials to normalize CoM trajectories. Alternatively, the perturbations may not have been strong enough to invoke differences in CoM trajectory across conditions. Future studies should explore measures of neuromuscular control that could explain CoM behavior in response to sudden ankle perturbations. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Medicine & Science in Sports & Exercise is the property of Lippincott Williams & Wilkins and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1249/01.mss.0000760732.08439.49
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      – Code: eng
        Text: English
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        StartPage: 137
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      – SubjectFull: Conferences & conventions
        Type: general
      – SubjectFull: Sprain prevention
        Type: general
      – SubjectFull: Gait in humans
        Type: general
      – SubjectFull: Ankle injuries
        Type: general
      – SubjectFull: Leg
        Type: general
      – SubjectFull: Diagnosis
        Type: general
      – SubjectFull: Biomechanics
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      – TitleFull: Center Of Mass Trajectory In Lower Extremity During Simulated Ankle Sprain.
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              Text: 2021 Supplement
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              Y: 2021
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