Base Of The Toe's Proximal Phalanx, Medial View

Description

Proximal phalanx of a toe is visualized from the medial aspect, with emphasis on the base (basis phalangis proximalis) and its proximal articular margin for the metatarsophalangeal joint. The concave articular surface occupies the proximal end, while the medial nonarticular cortex forms a smooth longitudinal wall that transitions distally toward the shaft. Along the plantar-medial edge of the base, the contour suggests the attachment region for the plantar plate and adjacent capsuloligamentous structures, which blend with the medial collateral ligament complex at the joint line. Medial profiling of the phalangeal base matters when you need to teach or document how the metatarsal head seats against the proximal phalanx and where periarticular soft tissues anchor, because small irregularities at the articular margin can correlate with capsular avulsion fragments, early osteophyte formation, or post-traumatic incongruity after a sprain. Turf toe patterns and chronic metatarsophalangeal instability often focus attention on the plantar plate, yet the bony footprint and the rim of the articular surface remain the fixed landmarks a surgeon references when assessing joint congruence and planning repair. Joint line anatomy is unforgiving. This illustration suits foot and ankle anatomy teaching in gross anatomy, orthopaedics, podiatry, and sports medicine curricula, and it also supports textbook figures on metatarsophalangeal sprain, degenerative change at the proximal articular margin, and targeted bony landmarks for collateral ligament or capsular repair. Anatomical accuracy verified by SciePro's Medical Advisory Board.