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Sagittal (left) and coronal (right) depictions of the pulley system of a typical flexor tendon (black areas) of the finger: fibro-osseous annular pulleys (A2, A4), palmar plate annular pulleys (A1, A3, and A5), and cruciate pulleys (C1, C2, and C3). Reprinted from Hauger et al, 2000 (1) with permission of the Radiological Society of North America.
