Tendon of second palmar interosseous muscle
Musculus interosseus palmaris secondus
- Related terms: Palmar interossei (2)
Definition
The tendon of second palmar interosseous muscle inserts into the radial side of the base of the proximal phalanx of the ring finger and its extensor hood, enabling adduction of the ring finger towards the middle finger.
The palmar interossei also assist in flexion at the metacarpophalangeal joints and extension at the interphalangeal joints via their insertion into the extensor expansion.
References
Valenzuela M, Bordoni B. Anatomy, Shoulder and Upper Limb, Hand Palmar Interosseous Muscle. [Updated 2025 Apr 27]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK537165/
