Question

MCP Flexion, Digits 2-5

A) Flexing the metacarpophalangeal joints of fingers 2 to 5
B) Extending the metacarpophalangeal joints of fingers 2 to 5
C) Flexing the metacarpophalangeal joints of fingers 1 to 5
D) Extending the metacarpophalangeal joints of fingers 1 to 5

Answer 1

MCP flexion for digits 2-5 involves flexing the metacarpophalangeal joints, which are biaxial and allow various finger movements.

Step-by-step explanation:

The metacarpophalangeal (MCP) flexion for digits 2-5 refers to the flexing of the metacarpophalangeal joints of these fingers. The MCP joint is a biaxial joint that allows flexion and extension as well as abduction, adduction, and circumduction movements. Flexing typically means bringing the fingers towards the palm (closing the hand), whereas extension would be straightening the fingers away from the palm. The phalanx bone of the thumb or one of the fingers plays a crucial role in this action, as it articulates with the metacarpal bones to form what we commonly refer to as the knuckles. Anatomically speaking, these joints are condyloid and are pivotal for the precise movements of our fingers.