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The relative length of the digit varies during motion of the IP joints. The length of the palmar aspect decreases during flexion while the dorsal aspect increases by about 24 mm. The useful range of motion of the PIP joint is 30–70°, increasing from the index finger to the little finger.
The collateral ligaments of interphalangeal joints are ligaments of the interphalangeal joints of the hand. They limit extension at these joints (together with the palmar ligaments). [1] On each side of the interphalangeal joints of the fingers are diagonally placed fibrous bands. The proximal ends of the bands are near the dorsal phalanges of ...
Anatomically, it is said that the knuckles consist of the metacarpophalangeal [1] (MCP) and interphalangeal (IP) joints of the finger. The knuckles at the base of the fingers may be referred to as the 1st [1] or major knuckles while the knuckles at the midfinger are known as the 2nd [2] and 3rd, or minor, knuckles.
In the human hand, palmar or volar plates (also referred to as palmar or volar ligaments) [1] are found in the metacarpophalangeal (MCP) and interphalangeal (IP) joints, where they reinforce the joint capsules, enhance joint stability, and limit hyperextension.
A hand imitating an ulnar claw. The metacarpophalangeal joints of the 4th and 5th fingers are extended and the Interphalangeal joints of the same fingers are flexed.. An ulnar claw, also known as claw hand or Spinster’s Claw, is a deformity or an abnormal attitude of the hand that develops due to ulnar nerve damage causing paralysis of the lumbricals.
Flexion of MCP and IP joints: Abductor pollicis brevis: Transverse carpal ligament, the scaphoid and trapezium: Radial base of proximal phalanx and the radial sesamoid: Median nerve (C8-T1) Abduction of MCP joint and flexion of IP joint. It also assists in opposition and extension of the thumb Adductor pollicis
The joints in the hand are joints found at the distal end of the upper limb. The joints are: In the wrist there is the radiocarpal joint between the radius and carpus.
Radial side of the proximal phalanx of the index finger: 2 Radial side of the middle phalanx of the index finger: 3 Tip of the index finger: 4 Tip of the middle finger: 5 Tip of the ring finger: 6 Tip of the little finger: 7 Distal interphalangeal joint crease of the little finger: 8 Proximal interphalangeal joint crease of the little finger: 9