Vinculum tendinis

A Vinculum Tendinis are small, vascular, ligament-like bands of connective tissue that anchor the flexor tendons of the fingers or toes to the periosteum of the phalanges and to the fibrous flexor sheaths.

Structure and Function

• The vincula transmit small blood vessels from the periosteum to the tendons, ensuring vascular supply and nutritional support for the long tendons.

• They pass through the synovial sheaths of the tendons.

• During flexion and extension, they allow smooth movements of tendons while preserving their blood flow.

Types

• Vinculum Longum — long, slender bands connecting the tendons to the proximal phalanx or to another tendon.

• Vinculum Breve — Short, thick band near the tendons' insertions on the distal phalanges.

Clinical Note

Damage to the vincula tendinis (e.g., during flexor tendon injuries) can impair the nutritional supply to the tendon and delay healing. Recognition of their role is essential in surgical repair of flexor tendon injuries.