Comparison of Subtalar Joint Range of Motion and Dorsiflexor Muscle Activity Between Normal and Pes Planus Feet (정상발과 평발에서의 목말밑 관절가동범위와 등쪽굽힘근의 근활성도 비교)

Koh, Eun Kyung (고은경); Jung, Do-Young (정도영)

doi:10.13066/kspm.2018.13.2.129

Comparison of Subtalar Joint Range of Motion and Dorsiflexor Muscle Activity Between Normal and Pes Planus Feet

Journal of the Korean Society of Physical Medicine
Abbr : J Korean Soc Phys Med
2018, 13(2), pp.129-135
DOI : 10.13066/kspm.2018.13.2.129
Publisher : The Korean Society of Physical Medicine
Research Area : Medicine and Pharmacy > Physical Therapy > Other physical therapy
Received : April 19, 2018
Accepted : April 24, 2018
Published : May 31, 2018

Koh, Eun Kyung ¹, Jung, Do-Young ²

¹마산대학교
²중부대학교

Accredited

ABSTRACT

PURPOSE: The imbalance of pretibial muscles can be a factor contributing to the development of pes planus. However, no study has yet compared the muscle activity of the tibials anterior (TA) to that of the extensor digitorum longus (EDL). The purpose of this study was to determine whether there are differences in the electromyographic (EMG) TA and EDL amplitude indexes (AIs) between normal and pes planus feet. METHODS: A total of 14 subjects with normal feet and 15 subjects with bilateral pes planus participated in this study. TA and EDL muscle activities were measured using a wireless EMG system and the angles of ankle dorsiflexion and eversion of the subtalar joint were measured using a universal goniometer during active ankle dorsiflexion in the prone position. AI was calculated as follows: amplitudeTA‒ amplitudeEDL / (amplitudeTA+amplitudeEDL) / 2×100. RESULTS: The AIs of the TA and EDL were significantly lower in pes planus feet than in normal feet (p<.05). The angle of subtalar eversion was significantly greater in pes planus feet than in normal feet during active ankle dorsiflexon (p<.05). However, there was no significant difference in the angle of ankle dorsiflexion between normal feet and pes planus feet (p>.05). CONCLUSION: This study showed that TA muscle activation was lower in pes planus feet than in normal feet, resulting from greater eversion range of motion during active ankle dorsiflexion. We suggest that the imbalance of ankle dorsiflexors must be considered in pes planus management.

KEYWORDS

Extensor digitorum longus, Pes planus, Pronation, Subtalar joint, Tibialis anterior

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* References for papers published after 2023 are currently being built.

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Journal of the Korean Society of Physical Medicine 2023 KCI Impact Factor : 0.45

Comparison of Subtalar Joint Range of Motion and Dorsiflexor Muscle Activity Between Normal and Pes Planus Feet

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Citation status

* References for papers published after 2023 are currently being built.

Journal of the Korean Society of Physical Medicine 2023 KCI Impact Factor : 0.45

Comparison of Subtalar Joint Range of Motion and Dorsiflexor Muscle Activity Between Normal and Pes Planus Feet

ABSTRACT

KEYWORDS

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* References for papers published after 2023 are currently being built.