In the hand anatomy, Structure G corresponds to which joint?

In the hand anatomy, Structure G corresponds to which joint?

• A. Second proximal interphalangeal joint
• B. First carpometacarpal joint
• C. Second distal interphalangeal joint
• D. Second metacarpophalangeal joint

Answer: (D)

In hand anatomy, you identify joints by where the bones come together. Structure G sits at the base of the index finger where the metacarpal bone meets the proximal phalanx, which is the knuckle area. This is the metacarpophalangeal joint of the second digit, allowing flexion, extension, and some sideways movement for grasp. The first carpometacarpal joint would be at the thumb’s base with the carpal bones, not at the index finger. The second proximal interphalangeal joint is between the proximal and middle phalanges, farther along the finger. The second distal interphalangeal joint is between the middle and distal phalanges, near the fingertip. Therefore Structure G corresponds to the second metacarpophalangeal joint.

In hand anatomy, you identify joints by where the bones come together. Structure G sits at the base of the index finger where the metacarpal bone meets the proximal phalanx, which is the knuckle area. This is the metacarpophalangeal joint of the second digit, allowing flexion, extension, and some sideways movement for grasp. The first carpometacarpal joint would be at the thumb’s base with the carpal bones, not at the index finger. The second proximal interphalangeal joint is between the proximal and middle phalanges, farther along the finger. The second distal interphalangeal joint is between the middle and distal phalanges, near the fingertip. Therefore Structure G corresponds to the second metacarpophalangeal joint.