Transverse head of adductor hallucis

NewsBot · Jan 19, 2021

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Fine-wire electromyography of the transverse head of adductor hallucis during locomotion
Kelly A.RobbHope D.MeladyStephen D.Perry
Gait & Posture

Highlights
•EMG can be successfully recorded in the adductor hallucis during locomotion
•EMG bursts occur at initial contact and toe-off of stance
•Adductor hallucis stabilizes the forefoot and anchors the hallux during propulsion
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Background
Previous literature on the transverse head of adductor hallucis (AddH-T) has largely focused on muscle morphology. This data provides insight into muscle architecture, yet fails to inform it’s functional implication during walking. The role of the AddH-T, which runs parallel to the distal transverse metatarsal arch, has never been studied using fine-wire EMG during locomotion.

Research question
The purpose of this study is to explain a novel method of recording fine-wire EMG of the adductor hallucis muscle of the foot, and secondly, to report phasic AddH-T muscle activity during level walking on hard and soft surfaces.

Methods
Ultrasound-guided fine-wire EMG was recorded from the AddH-T of each foot, in ten asymptomatic young adults. Participants completed ten walking trials per experimental conditions (hard and soft surface). Ensemble averages were calculated from the time normalized linear-envelopes of each participant, and represented from 0 to 100 percent of the gait cycle. Results. Using the described ultrasound-guided fine-wire protocol, successful EMG signals were generated in 19 of 20 feet. When walking over hard or soft flooring, the AddH-T muscle has two bursts in EMG, occurring between 0-20% and 50-65% of the gait cycle. The magnitude of peak activity was often reduced at initial contact when walking over foam. 45% of participants experienced a third burst in EMG activity at midstance, corresponding to 30-40% of the gait cycle.

Significance
This study has successfully explained a novel method of recording finewire electromyography (EMG) of the adductor hallucis (transverse head) muscle of the foot.

Results
suggest that the AddH-T stabilizes the forefoot at initial contact and toeoff, while further anchoring the hallux during propulsion. These results provide preliminary insight into the functional role of the AddH-T during human locomotion
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NewsBot · May 18, 2023

Extra heads of Adductor Hallucis muscle and an atypical attachment of several fibers: a case report
Eren Ogut, Zeynep Askin
Surg Radiol Anat. 2023 May 17

Purpose: The presence of supernumerary heads in the Adductor Hallucis (AddH) muscle represents a rare variant of plantar muscle variation that may exhibit divergent clinical manifestations in affected individuals. Clinical presentations may include progressive foot or heel pain, paresthesias, foot discomfort, limited range of motion in the mid/hindfoot regions, hallux vagus/varus deformity, and articular abnormalities.

Methods: In this case, a unique variation of the AddH was presented in a female cadaver, along with a literature review. The variation was characterized by the atypical attachment of several fibers to the intermuscular septum, and it was found that the cadaver had two-headed AddH muscles on both sides, with medial and lateral heads.

Results: The present case showed that the medial part of the Oblique Head (OH) blended with the tendon of the Flexor Hallucis Brevis (FHB), while the lateral part met with the tendon of the Transverse Head (TH). The origin of OH different than the previous types, while the origin site of TH was classified as type B. In contrast to previous reports, the medial and lateral heads of OH were recorded on both sides.

Conclusion: The varied organization of both heads and the location of AddH muscles may be attributed to various combinations of primordial muscles or anomalies during embryological development. Therefore, the variations and types of AddH should be taken into account during foot surgery.
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scotfoot · May 18, 2023

"Fine-wire electromyography of the transverse head of adductor hallucis during locomotion
Kelly A.RobbHope D.MeladyStephen D.Perry
Gait & Posture

Highlights
•EMG can be successfully recorded in the adductor hallucis during locomotion
•EMG bursts occur at initial contact and toe-off of stance
•Adductor hallucis stabilizes the forefoot and anchors the hallux during propulsion"

Yip, plantarflexes and adducts. Train the flexion action and you also strengthen its adduction abilities. Actually ,the same toe flexion action will also activate and strengthen the abductor hallucis . The adductor adducts and the abductor stops the hallux being pulled offline.

Transverse head of adductor hallucis

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NewsBot The Admin that posts the news.

scotfoot Well-Known Member

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Transverse head of adductor hallucis

NewsBot The Admin that posts the news.

NewsBot The Admin that posts the news.

scotfoot Well-Known Member

Tibial cortex transverse transport in patients with recalcitrant diabetic foot ulcers

Orthopaedic Manifestations of Transverse Myelitis in Children

Transverse laxity of the forefoot

The metatarsal parabola and the transverse arch of the foot .

The transverse arch of the foot -Venkadesan et al

Treatment of transverse flatfoot with hallux valgus in type I and II foot flatness

Foot orthosis with comprehensive method for correcting deformities of the transverse arch

Share This Page

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