El Cambio de Forma del Músculo Aductor Hallux y el Hallux Valgus

Abstract

The performance of the feet interferes on the posture, walk and on the wear of shoes. Deformities may appear due to structural changes motivated by the muscular imbalance as it seems to happen on Hallux Valgus (HV). The adductor hallucis muscle is considered important at this imbalance. Analyze the role of the AHM on the dynamics of the hallux and the forefoot as well as in the genesis of the HV. Dissection of 28 isolated feet (3 with HV), preserved in formaldehyde acquired from the Anatomy Laboratory of Petrópolis School of Medicine to obtain the morphometry of the HAM: length of the oblique and transverse heads (L-TH; L-OH); width of the heads (W-TH; W-OH) and angle between the heads (q). Medium values (mm), obtained from the feet without the deformity L-TH= 27.04; W-TH=13.23; L-OH= 51,45; W-OH=17.58; q (TH/OH) =31°, and the ones with HV: LTH= 23.80; W-TH=12.03; L-OH=48.25;W-OH=16.89; q (CT/ CO)=52°. The morphology of the AHM varies between the healthy and the feet with the HV. The AHM fixing on the metatarsal phalangeal joints and on the lateral sesamoid of the great toe may be the cause or the consequence of the q (CT/CO) variance that leads to the HV. The amputation of the great toe may flatten the anterior transverse arch, by muscular tension, hindering the functions of the foot such as support and walk.