Vincula:

• A. papillary ridges of skin that form finger prints
• B. superficial fibres of palmar aponeurosis that insert into the skin
• C. remnant fibres of palmar interossei inserting into the proximal phalanx at the thumb
• D. communication between common flexor sheath and sheath of pollicis longus present in 50% of people
• E. vascular synovial folds of flexor tendons