Tendon of first palmar interosseous muscle - MRI finger of hand - Axial PD FS - e-Anatomy
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Tendon of first palmar interosseous muscle

Tendo musculi interossei palmaris primi

Definition

Muhammad A. Javaid

The tendon of first palmar interosseous muscle inserts into both the base of the proximal phalanx of the index finger and its extensor hood. Its action is to adduct the index 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/

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