The Accessory Extensor Tendon of the First Metatarsophalangeal Joint

The accessory extensor tendon of the first metatar-sophalangeal joint (1st MTPJ) was evaluated in 32 cadaver feet. Eighty-one percent of feet possessed an accessory tendon to the 1st MTPJ. Of those feet possessing an accessory tendon to the 1st MTPJ, approx-imately 92 % originated from the extensor hallucis longus muscle–tendon unit, while approximately 8 % originated from the tibialis anterior muscle-tendon unit. All accessory tendons inserted onto the dorsal/dorsomedial capsule of the 1st MTPJ. Accessory tendons were found to be bilat-eral in the majority (87.5%) of specimens. Differences in sex distribution of the accessory tendon of the 1st MTPJ were not statistically significant. The difference in distri-bution of an accessory tendon to the 1st MTPJ in thos