Figure 5
A spur-free medial process of the calcaneus is depicted in a sagittal plane. (A) The plantar fascia inserts into the calcaneus. The enthesial cartilage is marked with a black arrow in this Giemsa stain. (B) The section in silver staining corresponding to A shows the longitudinal course of plantar fascia collagens, comprising of a superficial layer (SL) originating from the posterior and posterior-inferior aspect of the calcaneus. Plantar fascia collagens of the deeper layer (DL) insert in the anterior-inferior and anterior aspect of the calcaneus, demonstrating a different course of fibres compared to the superficial ones. a, anterior; i, inferior; p, posterior; s, superior.
