Groove For Tendon Of The Flexor Hallucis Longus Of The Talus, Posterior View

Description

Talus anatomy is centered here on the posterior process, where the groove for the flexor hallucis longus (FHL) tendon cuts an oblique channel between the medial and lateral tubercles. From this posterior perspective, the sulcus lies inferior to the trochlear surface for the tibia and posterior to the body of the talus, forming a bony pulley that redirects the FHL as it courses toward the plantar aspect of the hallux. The lateral tubercle sits lateral and slightly inferior to the medial tubercle, with the groove running between them as a well-defined, deep track. Bony landmarks are crisp. Posterior ankle pain often localizes to this exact corridor. Hypertrophy of the posterior talar process, an os trigonum, or a fracture of the lateral tubercle (Shepherd fracture) can narrow the fibro-osseous tunnel and irritate the FHL tendon sheath, producing painful stenosing tenosynovitis that worsens in ballet dancers and soccer players with repetitive plantarflexion. The fixed posterior viewpoint makes it easier to teach why the tendon is vulnerable at the level of the posterior process and how small variations in tubercle morphology change the available space, a point that can be missed when learners focus only on the talar trochlea and malleolar mortise. Use this illustration in gross anatomy and musculoskeletal modules when introducing the ankle and subtalar joint, and in orthopaedic or podiatric teaching files discussing posterior ankle impingement, os trigonum syndrome, and FHL tendinopathy. It also supports radiology and surgical publishing, pairing well with CT and MR correlations and with posterior ankle endoscopy or open excision approaches that reference the medial and lateral tubercles as landmarks. Anatomical accuracy verified by SciePro's Medical Advisory Board.