The deep transverse metacarpal ligament (also called the deep transverse palmar ligament) connects the palmar surfaces[citation needed] of metacarpophalangeal joints of all the fingers of the hand except the thumb.

[1] The deep transverse metacarpal ligament is a narrow fibrous band.

Behind[clarification needed] it, the tendons of the interosseous muscles of the hand pass to their insertions.

[citation needed] Rarely, the deep transverse metacarpal ligament may rupture.

[2] This article incorporates text in the public domain from page 331 of the 20th edition of Gray's Anatomy (1918)