The metacarpal bones articulate proximally with the carpals, and distally With all the proximal phalanges. They are really numbered, and each is linked to a digit: contain MCP or IP dislocations which can be irreducible and will likely really need to undergo surgical fixation to facilitate the restoration of functionality. https://www.theorthopaedicandpainpractice.com/what-are-the-different-bones-found-in-my-hand/