What is the main action performed by the flexor carpi ulnaris at the wrist joint?

The main action performed by the flexor carpi ulnaris at the wrist joint is wrist flexion. This muscle is primarily responsible for bending the wrist and is located on the anterior (flexor) compartment of the forearm. When it contracts, it helps pull the hand and wrist forward, decreasing the angle between the palm and the forearm.

Additionally, the flexor carpi ulnaris also contributes to ulnar deviation, meaning it can assist in moving the wrist towards the little finger side. However, its primary and most significant action remains wrist flexion, making it a crucial muscle for many activities that involve gripping or holding objects.

Wrist abduction, wrist extension, and wrist circumduction are movements that involve different muscles and are not primarily associated with the action of the flexor carpi ulnaris. Understanding the specific function of the flexor carpi ulnaris helps in recognizing its role in various wrist movements and overall hand function.