Apex Of The Head Of The Fibula, Lateral View

Description

Fibular head apex (styloid process) rises from the posterolateral margin of the proximal fibula, projecting superiorly above the rounded contour of the fibular head in this lateral view. Inferior to the apex, the fibular neck narrows and sweeps distally, forming the bony corridor where the common fibular (peroneal) nerve courses around the neck before dividing into superficial and deep branches. Anterior to the apex, the articular facet for the proximal tibiofibular joint lies on the medial aspect of the fibular head, while posteriorly the contour blends toward the posterolateral corner of the knee. Bony surface texture and the sharpness of the styloid are emphasized. Orthopaedic and sports medicine readers will recognize the fibular styloid as a key insertional region for structures stabilizing the posterolateral corner, including the lateral collateral ligament and the biceps femoris tendon, with adjacent attachments from the arcuate and popliteofibular ligament complex depending on anatomic variant. Avulsion at or near this apex can produce the classic arcuate sign on knee radiographs, often paired with ACL or PCL injury, and the proximity of the common fibular nerve explains the foot drop risk that accompanies displaced fibular head fractures or proximal tibiofibular joint injury. Surface anatomy matters here. The fixed lateral perspective keeps attention on the relationship between the styloid, head, and neck, which is the orientation surgeons use when planning a posterolateral approach and when counseling about nerve protection. Use this illustration in lower limb anatomy teaching, knee ligament and posterolateral corner chapters, and orthopaedic or radiology publications discussing fibular head avulsion fractures, proximal tibiofibular dislocation, or common fibular neuropathy at the fibular neck. Anatomical accuracy verified by SciePro's Medical Advisory Board.