EMG coherence of foot and ankle muscles increases with a postural challenge in men.
Gait Posture
; 113: 238-245, 2024 Sep.
Article
en En
| MEDLINE
| ID: mdl-38959555
ABSTRACT
BACKGROUND:
The functional role of intrinsic foot muscles in the control of standing balance is often overlooked in rehabilitation, partly because the interactions with ankle muscles are poorly understood. RESEARCH QUESTION How does coactivation of Flexor Digitorum Brevis (FDB) and soleus (SOL) vary across standing tasks of increasing difficulty.METHODS:
Postural sway (Centre of Pressure, CoP) and the electromyographic (EMG) activity of FDB, SOL, Medial Gastrocnemius (MG) and Tibialis Anterior (TA) were measured during bipedal standing, tandem stance, one-legged balance, and standing on toes. Coherence of the rectified EMG signals for SOL and FDB in two bandwidths (0-5 and 10-20â¯Hz) was calculated as a coactivation index. RESULTS ANDSIGNIFICANCE:
The CoP sway and the EMG activity of all muscles was greater (P<0.05) for the three difficult tasks. Significant coherence between the SOL and FDB EMG activity was found in both frequency regions 0-5 and 10-20â¯Hz. The coherence integral increased with the difficulty of the postural task, especially in the 10-20â¯Hz band. The findings underscore the important role of FDB in the control of standing balance across tasks and its coactivation with SOL. Clinical recommendations to improve balance control need to consider the interaction between the plantar flexor and intrinsic-foot muscles.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Músculo Esquelético
/
Electromiografía
/
Equilibrio Postural
/
Pie
Límite:
Adult
/
Humans
/
Male
Idioma:
En
Revista:
Gait Posture
Asunto de la revista:
ORTOPEDIA
Año:
2024
Tipo del documento:
Article
País de afiliación:
Grecia
Pais de publicación:
Reino Unido