Deep transverse metacarpal ligament

The deep transverse metacarpal ligaments are strong, fibrous bands located on the palmar (volar) surfaces of the hand. They connect the heads of the second through fifth metacarpal bones, essentially tying them together. These ligaments also blend with the fibrous capsules of the metacarpophalangeal joints in the knuckle region.

This arrangement is crucial for stabilizing the metacarpal arch of the hand. It helps maintain proper alignment of the metacarpal heads, especially during finger movements like abduction and flexion.

Each deep transverse metacarpal ligament has a concave (curved inward) surface on its palmar side, allowing the flexor tendons to glide smoothly over it. On the dorsal (back) side of these ligaments, the tendons of the interossei muscles pass on their way to insert into the extensor hoods of your fingers.