Anatomical Relations
The triangular ligaments sit on the dorsal aspect of the digital expansions, distal to the proximal interphalangeal joint (Colzani et al., 2016).
Structure
The triangular ligaments connect the lateral tendinous bands across the middle phalanx (Colzani et al., 2016).
Function
The ligament prevents separation and anterior displacement of the lateral bands during flexion of the proximal interphalangeal joint.
List of Clinical Correlates
—Boutonniere deformity
References
Colzani, G., Tos, P., Battiston, B., Merolla, G., Porcellini, G. and Artiaco, S. (2016) 'Traumatic Extensor Tendon Injuries to the Hand: Clinical Anatomy, Biomechanics, and Surgical Procedure Review', J Hand Microsurg, 8(1), pp. 2-12.
Learn more about this topic from other Elsevier products
Joint Ligament
Laxity of the TMJ ligaments → hypotonus of the temporal and masseter muscles → dropping of the jaw.
