Palmar aponeurosis pulley.
The transverse fascicular fibers and paratendinous bands of the palmar aponeurosis are positioned at the proximal margin of the flexor tendon sheath. These anatomic structures form a tunnel around the flexor tendon and appear to function as a palmar aponeurosis pulley in conjunction with the first and second annular pulleys of the digital flexor mechanism.
D005384:Finger Joint / Q000033:anatomy & histology / Q000502:physiology*; D006225:Hand / Q000033:anatomy & histology / Q000502:physiology*; D006801:Humans; D009068:Movement; D013710:Tendons / Q000033:anatomy & histology / Q000502:physiology*