Corpus: Phalangoglenoid ligament

The phalangoglenoid ligament is a superficial ligament of the metacarpophalangeal (MCP) and proximal interphalangeal (PIP) joints that reinforces their joint capsules.

The ligament is usually absent from the distal interphalangeal joint (DIP).

Metacarpophalangeal joint[Bearbeiten]

The ligament runs from the lateral base of the proximal phalanx of the fingers proximally to the joint capsule, crossing the collateral ligament and radiating into the palmar plate and the A1 annular ligament. On the thumb, the ligament also radiates into the corresponding sesamoid bone.

Proximal interphalangeal joint[Bearbeiten]

At the proximal interphalangeal joint, the ligament runs from the lateral base of the medial phalanx diagonally to the palmar plate above the proximal phalanx and crosses over the collateral ligament of the PIP.

Depending on which side the ligament is located, a distinction is made between a radial phalangoglenoid ligament and an ulnar phalangoglenoid ligament.

The two sesamoid bones are held together by the phalangoglenoid ligament. Together with the palmar plate and the A1 annular ligament, these serve as a guide rail for the tendons. It also prevents unintentional tilting or tilting of the glenoid cavity during a flexion movement.

• Hirt et al, Anatomy and biomechanics of the hand (4th completely revised edition), Thieme, 2021