Adductor Digiti Minimi Muscle, Plantar View

Description

Arising from the plantar aspect of the third and fourth metatarsals and the sheath of the fibularis (peroneus) longus tendon, the adductor digiti minimi is shown as a deep intrinsic muscle on the lateral side of the male forefoot. Its belly lies plantar to the metatarsal shafts and interossei, coursing distally toward the fifth metatarsophalangeal joint to join the lateral base of the proximal phalanx of the fifth digit. Phalanges, metatarsals, and the tarsal bones including calcaneus and talus frame the muscle’s position, while articular cartilage highlights the interphalangeal and metatarsophalangeal joint surfaces. Deep and lateral. Plantar views like this clarify the layered anatomy beneath the plantar aponeurosis, where the adductor digiti minimi can be confused with the flexor digiti minimi brevis when teaching the third plantar layer. The muscle’s pull across the fifth metatarsophalangeal joint relates directly to bunionette (tailor’s bunion) mechanics, in which lateral forefoot pain and fifth metatarsal head prominence alter the balance of intrinsic soft tissues. For surgeons addressing lateral forefoot deformity or performing approaches around the fifth ray, knowing what lies plantar and deep to the metatarsals helps avoid unnecessary disruption of intrinsic muscle attachments. Foot and ankle anatomy courses, podiatry curricula, and orthopedic teaching files can use this plate to pair osteology with intrinsic muscle orientation, including correlation with plantar dissection labs and schematic drawings of the plantar layers. Publishers will also find it suitable for chapters on toe deformities, metatarsophalangeal joint pathology, and intrinsic muscle function in gait. Anatomical accuracy verified by SciePro's Medical Advisory Board.