Anatomy & Physiology: Muscles—Abductor Digiti Minimi (fingers).
Structure.
- Origin: pisiform and tendon of flexor carpi ulnaris.
- Insertion: medial side of proximal phalanx of littler finger.
Function.
- Concentric action: abducts and flexes little finger at metacarpophalangeal joint.
- Reverse mover action: abduct 5th metacarpal at MCP; abduct hamate at CMC of little finger; flex 5th metacarpal at MCO; distally glide the pisiform at CMC; extend proximal phalanx of little finger at PIP; extend middle phalanx of little finger at DIP.
- Eccentric action: controls/restrains/slows little finger at MCP, CMC, DIP, and PIP joints.
- Isometric action: stabilize little finger at MCP, CMC, DIP, PIP.
- Innervation: ulnar nerve.
- Arterial supply: branches of ulnar artery.
Clinical Significance.
More.
- https://www.anatomynext.com/abductor-digiti-minimi-of-hand/
- https://www.youtube.com/watch?v=X-JwGGu_97I
- https://www.youtube.com/watch?v=S0aHLPfcDtY
- https://www.youtube.com/watch?v=i-ptRcFtxSU
- https://www.youtube.com/watch?v=15ojdmKkueM
References
Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.
Cedars-Sinai. (2018). Vertebrae of the spine. Retrieved from https://www.cedars-sinai.org/health-library/diseases-and-conditions/v/vertebrae-of-the-spine.html
Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.
Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.
Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.
