Anatomical considerations of the thumb carpo-metacarpal joint ligaments, based on a case report of isolated joint dislocation

Abstract

The wide range of mobility of the thumb and its capacity for opposition are one of the main evolutionary elements that differentiate our species from the rest of the animals. To understand this mobility, we should consider the thumb as an articular complex that includes the joints: scaphotrapezial, trapeziometacarpal, metacarpophalangeal, and interphalangeal. We will focus only on the trapeziometacarpal joint.1,2