Ligaments of the Wrist and Hand
| Ligament | Location | Function |
|---|---|---|
| Posterior radiocarpal ligament | runs diagonally across the posterior aspect of the wrist from the distal end of the radius to the triquetral and hamate carpal bones (on the ulnar side of the wrist | limits flexion of the wrist |
Which muscles are responsible for wrist flexion?
Flexion: bending the wrist towards the palm. Muscles include: Flexor Carpi Ulnaris (prime mover), Flexor Carpi Radialis (prime mover), Palmaris longus (tightens the skin and fascia in the palm), Flexor Digitorum Superficialis (finger flexor, assists only).
What tendons and ligaments are in the wrist?
radial and ulnar collateral ligaments – a pair of ligaments which bind the bones of the wrist and provide stability. volar radiocarpal ligaments – a complex web of ligaments that support the palm side of the wrist. dorsal radiocarpal ligaments – ligaments that support the back of the wrist.
What are the 3 main muscles involved in wrist flexion?
These muscles are: the flexor carpus radialis, flexor carpus ulnaris, and palmaris longus. The other three muscles, the flexor digitorum superficialis, flexor digitorum profundus, and flexor pollicis longus, start in the forearm and the tendons attach to phalanges (finger bones).
What is the triangular fibrocartilage complex?
Overview. A triangular fibrocartilage complex (TFCC) is a structure in the wrist that supports the carpal bones on the wrist. The TFCC is responsible for keeping the radius and ulna stable as the hand grasps an object or the forearm rotates.
How many ligaments are in the wrist?
There are four palmar radiocarpal ligaments. Each has a proximal attachment to the radius and a distal attachment to one or more carpal bones.
What is triangular fibrocartilage complex?
What causes triangular fibrocartilage complex?
What causes a TFCC tear? There are two types of TFCC tears: traumatic and degenerative. Traumatic tears typically result from falling on an outstretched hand, excessive arm rotation or a blow to the wrist. Athletes are at risk, especially those who use a racquet, bat or club or put pressure on the wrists.
What is the ulnar fovea?
The fovea is situated between the ulnar styloid process and the flexor carpi ulnaris tendon. Ligamentous structures in the fovea region when the forearm is in a neutral position form the foveal attachments of the conjoined palmar and dorsal radioulnar ligaments and the ulnocarpal ligaments.
What are ligaments in wrist?
Wrist Ligaments The Ulnocarpal and radioulnar ligaments are two sets of ligaments that provide the main support for the wrist. The scapholunate interosseous ligament and the lunotriquetral interosseous ligament provide stability to the proximal carpal row.
What is Palmaris longus?
The Palmaris longus (PL) muscle is a long, slender muscle which is usually present in the superficial volar compartment of the forearm, interposed between the Flexor Carpi Ulnaris and the Flexor Carpi Radialis muscles. The absence of the palmaris longus does not have an effect on grip strength.
