Poonia Deepika, Tiwari Swati, Mishra Sabita
Anatomy, Maulana Azad Medical College, New Delhi, IND.
Cureus. 2020 Dec 19;12(12):e12165. doi: 10.7759/cureus.12165.
Accessory fibularis muscle is prevalent in 2.9-21.8% of the world population. Incidentally during routine dissection of a 75-year-old male cadaver, bilaterally accessory fibularis muscle was observed. On both the sides, proximal site of attachment was same but muscle displayed different distal sites of insertion in the foot. Appearance of accessory muscle in the leg is indicative towards the ongoing phylogenetic evolution operating at the molecular level. Bio-mechanical advantage of this variant muscle is the additional support provided to the subtalar joint. Also it acts as synergist to fibularis longus and brevis during eversion of the foot. Clinically this muscle may predispose to chronic ankle pain, dislocation of peroneal tendons from retromalleolar groove and post fracture dislocation in foot. Wide range of accessory fibularis muscle has been previously reported with different nomenclature, however, existence of two different variants in same cadaver has been rarely reported. The current observation is significant for clinicians to acknowledge when evaluating and operating patients with foot disorders.
副腓骨肌在世界人口中的发生率为2.9%-21.8%。在对一名75岁男性尸体进行常规解剖时，偶然发现双侧副腓骨肌。两侧的近端附着点相同，但肌肉在足部的远端插入点不同。腿部出现副肌表明在分子水平上正在进行系统发育进化。这种变异肌肉的生物力学优势在于为距下关节提供额外支撑。此外，在足部外翻时，它作为腓骨长肌和腓骨短肌的协同肌发挥作用。临床上，这块肌肉可能会导致慢性踝关节疼痛、腓骨肌腱从踝后沟脱位以及足部骨折后脱位。此前已报道过多种类型的副腓骨肌，名称各异，但同一尸体中存在两种不同变异的情况却鲜有报道。当前的观察结果对于临床医生在评估和治疗足部疾病患者时具有重要意义。
