Lumbricals of hand at a glance
- What it is
- Four small muscles of the palm that arise from the flexor digitorum profundus tendons.
- Location
- Arise from the tendons of flexor digitorum profundus and insert onto the radial side of the extensor expansions of the second to fifth fingers.
- Function
- Flex the metacarpophalangeal joints and extend the interphalangeal joints.
- Body system
- Muscular · paired (left and right)
- FMA ID
- FMA42398 (Foundational Model of Anatomy)
Key facts
- Innervation: lateral two by the median nerve, medial two by the deep branch of the ulnar nerve (C8–T1)
- Unusual in linking flexor tendons to extensor expansions
Structures next to the lumbricals of hand
The nearest named structures in the 3D model, measured from the centre of each part:
- Palmar interossei of hand · muscular
- Dorsal interossei of hand · muscular
- Proximal phalanx of ring finger · skeletal
- Proximal phalanx of middle finger · skeletal
- Third metacarpal bone · skeletal
- Second metacarpal bone · skeletal
- Fourth metacarpal bone · skeletal
- Transverse head of adductor pollicis · muscular
- Dorsal venous network of hand · cardiovascular
- Palmar metacarpal artery · cardiovascular
References
- Foundational Model of Anatomy: Lumbricals of hand (FMA42398). EMBL-EBI Ontology Lookup Service.
- OpenStax. Anatomy and Physiology 2e, §11.2 Naming Skeletal Muscles. Rice University, 2022.
- Mitsuhashi N. et al. (2009). BodyParts3D: 3D structure database for anatomical concepts. Nucleic Acids Research 37, D782–D785. Data © The Database Center for Life Science, CC BY 4.0.
Related anatomy
Explore the whole body in the interactive 3D human anatomy model, or browse the A–Z list of human structures.