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Does spastic myopathy determine active movement and ambulation speed in chronic spastic paresis?—A cross-sectional study on plantar flexors.

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Title: Does spastic myopathy determine active movement and ambulation speed in chronic spastic paresis?—A cross-sectional study on plantar flexors.
Authors: Pradines, Maud, Jabouille, François, Fontenas, Enguerran, Baba Aissa, Idriss, Gault-Colas, Caroline, Baude, Marjolaine, Guihard, Marina, Gros, Karine, Gracies, Jean-Michel
Source: PLoS ONE; 10/24/2024, Vol. 19 Issue 10, p1-16, 16p
Subject Terms: PLANTARFLEXION, DORSIFLEXION, HEMIPARESIS, TORQUE, PARALYSIS, ANKLE
Abstract: Background: Functional correlates of spastic myopathy, the muscle disorder of spastic paresis, are unknown. Objective: To explore reciprocal relationships between clinical and structural parameters of plantar flexors with i) ambulation speed, ii) dorsiflexion and plantarflexion torques in chronic hemiparesis. Methods: Cross-sectional trial in chronic stroke-induced hemiparesis (>6 months). Plantar flexors were quantified through i) the Five Step Assessment: maximal extensibility (XV1), active range of dorsiflexion (XA); ii) ultrasonography: fascicle length (Lf) and thickness (Th) of medial gastrocnemius (GAS) and soleus (SOL), knee extended in an isokinetic ergometer, ankle at 80% XV1-GAS. Maximal isometric torques in plantar flexion (PF) and dorsiflexion (DF) and maximal barefoot 10-meter ambulation speed were collected. Relationships between structural, biomechanical, clinical and functional parameters were explored using non-parametric testing (Spearman). Results: Twenty-one subjects (age 58.0±8.4, mean±SD, time since lesion 7.8±5.7 years) were recruited, with the following characteristics: ambulation speed, 0.77±0.37m/sec; XV1-SOL 92.7±10.3°; XV1-GAS 91.3±9.6°; XA-SOL 86.9±10.0°; XA-GAS 7676±14.2°; LfGAS, 58.2±18.3mm; ThGAS, 17.1±3.6 mm; LfSOL, 36.0±9.6 mm; ThSOL, 13.8±3.3mm; PF peak-torque 46.5±34.1Nm, DF peak-torque, 20.1±19.1Nm. XA-SOL and XA-GAS strongly correlated with XV1-SOL and XV1-GAS respectively (ρ = 0.74, p = 4E-04; resp ρ = 0.60, p = 0.0052). Ambulation speed moderately correlated with LfGAS (ρ = 0.51, p = 0.054), ThGAS (ρ = 0.58, p = 0.02) and LfSOL (ρ = 0.63, p = 0.009). DF and PF peak-torques both correlated with LfGAS (ρ = 0.53, p = 0.04) a; resp. ρ = 0.71, p = 0.0015). Conclusion: In chronic hemiparesis, active dorsiflexion is mostly determined by plantar flexor extensibility. Plantar flexor fascicle shortening is associated with reduced ambulation speed and ankle torques. Attempts to restore plantar flexor extensibility might be important objectives for gait rehabilitation in chronic hemiparesis. [ABSTRACT FROM AUTHOR]
Copyright of PLoS ONE is the property of Public Library of Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. 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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  Label: Title
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  Data: Does spastic myopathy determine active movement and ambulation speed in chronic spastic paresis?—A cross-sectional study on plantar flexors.
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  Data: <searchLink fieldCode="AR" term="%22Pradines%2C+Maud%22">Pradines, Maud</searchLink><br /><searchLink fieldCode="AR" term="%22Jabouille%2C+François%22">Jabouille, François</searchLink><br /><searchLink fieldCode="AR" term="%22Fontenas%2C+Enguerran%22">Fontenas, Enguerran</searchLink><br /><searchLink fieldCode="AR" term="%22Baba+Aissa%2C+Idriss%22">Baba Aissa, Idriss</searchLink><br /><searchLink fieldCode="AR" term="%22Gault-Colas%2C+Caroline%22">Gault-Colas, Caroline</searchLink><br /><searchLink fieldCode="AR" term="%22Baude%2C+Marjolaine%22">Baude, Marjolaine</searchLink><br /><searchLink fieldCode="AR" term="%22Guihard%2C+Marina%22">Guihard, Marina</searchLink><br /><searchLink fieldCode="AR" term="%22Gros%2C+Karine%22">Gros, Karine</searchLink><br /><searchLink fieldCode="AR" term="%22Gracies%2C+Jean-Michel%22">Gracies, Jean-Michel</searchLink>
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  Data: PLoS ONE; 10/24/2024, Vol. 19 Issue 10, p1-16, 16p
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  Data: <searchLink fieldCode="DE" term="%22PLANTARFLEXION%22">PLANTARFLEXION</searchLink><br /><searchLink fieldCode="DE" term="%22DORSIFLEXION%22">DORSIFLEXION</searchLink><br /><searchLink fieldCode="DE" term="%22HEMIPARESIS%22">HEMIPARESIS</searchLink><br /><searchLink fieldCode="DE" term="%22TORQUE%22">TORQUE</searchLink><br /><searchLink fieldCode="DE" term="%22PARALYSIS%22">PARALYSIS</searchLink><br /><searchLink fieldCode="DE" term="%22ANKLE%22">ANKLE</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Background: Functional correlates of spastic myopathy, the muscle disorder of spastic paresis, are unknown. Objective: To explore reciprocal relationships between clinical and structural parameters of plantar flexors with i) ambulation speed, ii) dorsiflexion and plantarflexion torques in chronic hemiparesis. Methods: Cross-sectional trial in chronic stroke-induced hemiparesis (>6 months). Plantar flexors were quantified through i) the Five Step Assessment: maximal extensibility (X<subscript>V1</subscript>), active range of dorsiflexion (X<subscript>A</subscript>); ii) ultrasonography: fascicle length (Lf) and thickness (Th) of medial gastrocnemius (GAS) and soleus (SOL), knee extended in an isokinetic ergometer, ankle at 80% X<subscript>V1-GAS</subscript>. Maximal isometric torques in plantar flexion (PF) and dorsiflexion (DF) and maximal barefoot 10-meter ambulation speed were collected. Relationships between structural, biomechanical, clinical and functional parameters were explored using non-parametric testing (Spearman). Results: Twenty-one subjects (age 58.0±8.4, mean±SD, time since lesion 7.8±5.7 years) were recruited, with the following characteristics: ambulation speed, 0.77±0.37m/sec; X<subscript>V1-SOL</subscript> 92.7±10.3°; X<subscript>V1-GAS</subscript> 91.3±9.6°; X<subscript>A-SOL</subscript> 86.9±10.0°; X<subscript>A-GAS</subscript> 7676±14.2°; Lf<subscript>GAS</subscript>, 58.2±18.3mm; Th<subscript>GAS</subscript>, 17.1±3.6 mm; Lf<subscript>SOL</subscript>, 36.0±9.6 mm; Th<subscript>SOL</subscript>, 13.8±3.3mm; PF peak-torque 46.5±34.1Nm, DF peak-torque, 20.1±19.1Nm. X<subscript>A-SOL</subscript> and X<subscript>A-GAS</subscript> strongly correlated with X<subscript>V1-SOL</subscript> and X<subscript>V1-GAS</subscript> respectively (ρ = 0.74, p = 4<superscript>E-04</superscript>; resp ρ = 0.60, p = 0.0052). Ambulation speed moderately correlated with Lf<subscript>GAS</subscript> (ρ = 0.51, p = 0.054), Th<subscript>GAS</subscript> (ρ = 0.58, p = 0.02) and Lf<subscript>SOL</subscript> (ρ = 0.63, p = 0.009). DF and PF peak-torques both correlated with Lf<subscript>GAS</subscript> (ρ = 0.53, p = 0.04) a; resp. ρ = 0.71, p = 0.0015). Conclusion: In chronic hemiparesis, active dorsiflexion is mostly determined by plantar flexor extensibility. Plantar flexor fascicle shortening is associated with reduced ambulation speed and ankle torques. Attempts to restore plantar flexor extensibility might be important objectives for gait rehabilitation in chronic hemiparesis. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label:
  Group: Ab
  Data: <i>Copyright of PLoS ONE is the property of Public Library of Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. 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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        Value: 10.1371/journal.pone.0310969
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        Text: English
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      – SubjectFull: PLANTARFLEXION
        Type: general
      – SubjectFull: DORSIFLEXION
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              Text: 10/24/2024
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