Soleus arthrogenic muscle inhibition following acute lateral ankle sprain correlates with symptoms and ankle disability but not with postural control.
J Sport Health Sci
; 13(4): 559-568, 2024 Jul.
Article
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| MEDLINE
| ID: mdl-38428732
ABSTRACT
BACKGROUND:
Acute lateral ankle sprains (ALAS) are associated with long-term impairments and instability tied to altered neural excitability. Arthrogenic muscle inhibition (AMI) has been observed in this population; however, relationships with injury-related impairments are unclear, potentially due to the resting, prone position in which AMI is typically measured. Assessing AMI during bipedal stance may provide a better understanding of this relationship.METHODS:
AMI was assessed in 38 young adults (19 ALAS within 72 h of injury 10 males, 21.4 ± 2.7 years; 19 healthy controls 10 males, 21.9 ± 2.2 years; mean ± SD) using the Hoffmann reflex (H-reflex) during bipedal stance. Electrical stimulation was administered to identify the maximal H-reflex (Hmax) and maximal motor response (Mmax) from the soleus, fibularis longus, and tibialis anterior muscles. The primary outcome measure was the Hmax/Mmax ratio. Secondary outcomes included acute symptoms (pain and swelling), postural control during bipedal stance, and self-reported function.RESULTS:
No significant group-by-limb interactions were observed for any muscle. However, a significant group main effect was observed in the soleus muscle (F(1,35)â¯=â¯6.82, pâ¯=â¯0.013), indicating significantly lower Hmax/Mmax ratios following ALAS (0.38 ± 0.20) compared to healthy controls (0.53 ± 0.16). Furthermore, lower Hmax/Mmax ratios in the soleus significantly correlated with acute symptoms and self-reported function but not with postural control.CONCLUSION:
This study supports previous evidence of AMI in patients with ALAS, providing insight into neurophysiologic impacts of musculoskeletal injury. Our results suggest that assessing AMI in a standing position following acute injury may provide valuable insight into how AMI develops and guide potential therapeutic options to curb and offset the formation of joint instability.Palabras clave
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Base de datos:
MEDLINE
Asunto principal:
Traumatismos del Tobillo
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Músculo Esquelético
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Equilibrio Postural
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Reflejo H
Idioma:
En
Revista:
J Sport Health Sci
Año:
2024
Tipo del documento:
Article