INTRINSIC MUSCLES OF THE HAND-PALMAR INTEROSSI

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SUMMARY


1. O: palmar surface of 2, 4, 5 metacarpals. 
2. I: bases of proximal phalanx and extensor expansion of digits 2, 4, 5.
3. NS: deep branch of ulnar n. 
4. BS: deep palmar arch. 
5. A: adducts digits towards the axial line (middle finger) of the hand, flex digits at the MCPJ and extend at IPJ. 

Palmar Interossi.jpg
Image: Case courtesy of OpenStax College, Radiopaedia.org. From the case rID: 44017 [Accessed 19 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.