Thumb Anatomy Ligaments at Anatomy

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Thumb Anatomy Ligaments. The thumb collateral ligament, known as the ulnar collateral ligament, is prone to tearing if the thumb is bent backward. The ulnar collateral ligament of the metacarpophalangeal joint is typically striated and less than 3 mm thick.

Anatomy Of The Thumb Ligaments
Anatomy Of The Thumb Ligaments from savecatchingfire.blogspot.com

The dorsal thumb cmc ligaments from a right hand showing the dorsal deltoid ligament complex consisting of the dorsal radial ligament (drl), dorsal central ligament (dcl), and posterior oblique ligament (pol), all emanating from the dorsal tubercle of the trapezium (tz). Tether skin to deeper layers of fascia and bone to prevent excessive mobility of skin and improve grip. Ligaments are tough bands of tissue that connect bones together.

Anatomy Of The Thumb Ligaments

Fourteen ligaments inserted onto the trapezium and 2 others attached independently to the thumb metacarpal. The ligaments and pulleys of the thumb show considerable variability on mri in healthy volunteers. The trapeziometacarpal joint, or carpometacarpal (cmc) joint, is a distinguishing and unique feature of the human opposable thumb. This first metacarpal connects to the proximal phalanx.