MUSCLES-LUMBRICALS
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SUMMARY
1. From each of the 4 FDP tendons arises a lumbrical which passes along the radial side of the MCPJ.
2. On the palmar surface of the deep transverse metacarpal ligament, each develops a tendon which runs in a fibrous lumbrical canal to reach the extensor expansion on the dorsum of the 1st phalanx.
3. 2 ulnar lumbricals are innervated by ulnar n. & 2 radial lumbricals are innervated by median n.
4. These flex the MCPJ.
Image: Case courtesy of OpenStax College, Radiopaedia.org. From the case rID: 44017 [Accessed 27 Apr 2020].
Reference(s)
R.M.H McMinn (1998). Last’s anatomy: regional and applied. Edinburgh: Churchill Livingstone.
Gray, H., Carter, H.V. and Davidson, G. (2017). Gray’s anatomy. London: Arcturus.
