Which muscle is responsible for flexing and abducting the wrist?

Study for the NCSF Functional Anatomy Test. Prepare with flashcards and multiple choice questions, complete with hints and explanations. Get ready for your exam today!

The flexor carpi radialis plays a crucial role in both flexing and abducting the wrist. This muscle originates from the medial epicondyle of the humerus and inserts at the base of the second and third metacarpals. When it contracts, it causes flexion at the wrist joint while simultaneously moving the hand toward the radial side, known as abduction. This dual action makes it essential for movements that require both flexion and abduction of the wrist, such as certain grasping or holding activities.

In contrast, the other muscles listed have different primary actions. The flexor carpi ulnaris also flexes the wrist but primarily adducts it toward the ulnar side. The extensor carpi radialis muscles extend the wrist and assist in abducting it, but they do not contribute to wrist flexion. Lastly, the extensor carpi ulnaris extends and adducts the wrist, further emphasizing that it does not facilitate wrist flexion or represent the primary muscle responsible for both flexion and abduction.

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