Corpus: Accessory collateral ligament
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English:
Definition[Bearbeiten]
The collateral ligaments are ligaments of the finger joints belonging to the superficial layer of the collateral ligaments.
Anatomy[Bearbeiten]
The accessory collateral ligaments are found in all three joints of the long fingers. Depending on which joints they run between, a distinction is made between different origins on the respective bones.
Metacarpophalangeal joint[Bearbeiten]
At the metacarpophalangeal joint (MCP), the ligament originates further palmar-proximal to the ligamentum collaterale at the head of the metacarpal bone and radiates into the palmar plate, widening continuously.
Proximal interphalangeal joint[Bearbeiten]
At the proximal interphalangeal joint (PIP), the course is identical, with the difference that the ligament originates at the distal head of the proximal phalanx.
Distal interphalangeal joint[Bearbeiten]
At the distal interphalangeal joint (DIP), the ligament originates at the head of the phalanx media, runs more steeply and then also radiates into the palmar plate.
Literature[Bearbeiten]
- Hirt et al, Anatomy and biomechanics of the hand (4th completely revised edition), Thieme, 2021