2017年3月29日 · It is a common belief that extension of the metacarpophalangeal (MCP) joint of the finger is achieved via the sagittal bands acting as a sling or lasso to attach the extensor tendon to the base of the proximal phalanx.

2023年10月30日 · The metacarpophalangeal joints (MCP) are a collection of condyloid joints that connect the metacarpus, or palm of the hand, to the fingers. There are five separate metacarpophalangeal joints that connect each metacarpal bone to the corresponding proximal phalanx of each finger.

2025年1月4日 · Extensor Tendon Injuries are traumatic injuries to the extensor tendons that can be caused by laceration, trauma, or overuse. Diagnosis is made clinically by physical examination and performing various provocative tests depending on the location of the injury. Treatment can be nonoperative or operative depending on the zone of injury.

Finger metacarpophalangeal (MCP) joint extension. Patient is sitting with forearm and hands supported, forearm in midposition, wrist neutral and MCP joint in neutral position. Firm. Expected range of motion is 45 degrees. [1] ↑ Norkin CC, White DJ. Measurement of Joint Motion: A Guide to Goniometry. FA Davis; 2021 Feb 07.

2023年8月4日 · Extension of the MCP joints allows the fingers to extend or extend away from the palm. The primary extensor muscles of the MCP joints are Extensor Digitorum, Extensor Digiti Minimi, and Dorsal Interosseous Muscles.

Thumb metacarpophalangeal (MCP) joint flexion and extension. Patient is seated with arm rested on a table and elbow flexed. The forearm is positioned in the mid-position and the wrist is slightly positioned in extension. The MCP joint being measured is at 0° of extension. [1] The thumb MCP joint is flexed to the limit of motion. [1]

Purpose: It is a common belief that extension of the metacarpophalangeal (MCP) joint of the finger is achieved via the sagittal bands acting as a sling or lasso to attach the extensor tendon to the base of the proximal phalanx. The aim of this study was to test the hypotheses that (1) division of the sagittal bands reduces extension force or ...

2023年8月14日 · The MCP joint of the thumb is structurally and functionally similar to the MCP joints of the other digits; however, there are differences and these will be noted when relevant. The thumb MCP joint is a hinge joint that allows up to 80 to 90 degrees of flexion with minimal extension, adduction, or abduction. [1]

Purpose It is a common belief that extension of the metacarpophalangeal (MCP) joint of the finger is achieved via the sagittal bands acting as a sling or lasso to attach the extensor tendon to the base of the proximal phalanx.

2017年5月22日 · At the MCP joint level the intrinsic muscles and tendons are palmar to the joint axis of rotation. This bimodal course allows the intrinsics to flex the MCP joints and extend the IP.