Thumb Anatomy Ligaments

Ladd md 1. There are four thumb tendons.

Sprained Thumb

The ligaments and pulleys of the thumb show considerable variability on mri in healthy volunteers.

Thumb anatomy ligaments. This tendon helps you bend the thumb. Flexion and extension occur parallel to the palm of the hand. Ulnar collateral ligament most common.

The radial collateral ligaments of the thumb mp are also injured at a higher rate than finger mp or ip joints but are less common than the ulnar collateral ligament. It allows the thumb to act like a post. When the thumb is straight the collateral ligaments are tight and stabilize the joint against valgus force.

Any hard force on the thumb that pulls the thumb away from the hand called a valgus force can cause damage to the ulnar collateral ligaments. This helps connect the thumb to the hand on the side near the index finger. Anatomy and spectrum of findings in asymptomatic volunteers.

The ulnar collateral ligament of the metacarpophalangeal joint is typically striated and less than 3 mm thick. Thumb collateral ligament injuries include radial collateral ligament rare. The joint that is affected is called the metacarpophalangeal joint or mcp joint.

Joint capsule of the thumb. Thumb carpometacarpal ligaments inside and out. These ligaments are best seen on sagittal mr images of the thumb.

These ligaments are best seen on sagittal mr images of the thumb. Injury to this ligament is sometimes called skiers thumb because it is a common injury from a ski pole. The collateral ligaments are called the anterior and posterior ligaments.

A comparative study of arthroscopic and gross anatomy from the robert a. Zhang md 1 sarah van nortwick ba 1 elisabet hagert md 1 2 and amy l. The dorsal ligaments comprise the dorsal radial ligament posterior oblique ligament and intermetacarpal ligament fig 1.

The radial collateral ligament is on the other side of the thumb. The most common ligament to be injured in the thumb is the ulnar collateral ligament. The thumb is the first of the hands five digits but it is typically not referred to as a finger.

Eponyms for ulnar collateral ligament ucl injury are gamekeepers thumb for chronic injury. This tendon travels along the back of the thumb and helps straighten the thumb. The thumb joint has two collateral ligaments as well as the capsule which is lined by a synovial membrane.

Mri of the thumb. The radial collateral ligament is injured in forced adduction and leads to instability and eventually degeneration. The thumb possesses a unique and wide range of motion not shared by the hands other digits.

They are responsible for reinforcing the thumb. Extensor pollicis brevis. Chase hand and upper limb center at stanford university andrew y.

Skiers thumb for acute injury. This tendon helps you move the thumb away from the palm to form an open hand. Thumb collateral ligament injury.

Thumb Anatomy Mpc Joint Tendons Ligaments Ligaments