What is the primary action of the flexor digiti minimi?

The primary action of the flexor digiti minimi is to bend (or flex) the pinky finger. This muscle is located in the hand and plays a key role in allowing for the movement of the little finger, specifically facilitating its flexion at the metacarpophalangeal joint. This action is essential for various hand functions, including grasping and manipulating objects, as well as improving dexterity in finger movements. Understanding the role of this muscle helps in recognizing how hand movements are coordinated and the importance of flexion in the overall functionality of the hand. The other options do not pertain to the flexor digiti minimi; therefore, they are not involved in the primary action of this muscle.