Which muscle is innervated by the median nerve?

Which muscle is innervated by the median nerve?

• A. Flexor carpi ulnaris
• B. Palmaris longus
• C. Flexor digitorum profundus
• D. Extensor carpi radialis

Answer: (B)

The palmaris longus is indeed innervated by the median nerve, which is significant as it plays a role in wrist flexion and the ability to oppose the thumb. The muscle primarily assists in flexing the skin of the palm and providing tension in the palmar fascia. Its innervation by the median nerve is crucial because this nerve supplies motor function to several muscles in the forearm and hand, particularly those involved in flexion and opposition movements. Understanding the role of the median nerve is important for comprehending common clinical conditions, such as carpal tunnel syndrome, where the median nerve can become compressed, affecting its ability to innervate the palmaris longus and surrounding muscles. The presence of this muscle is also notable in that not all individuals have it, which can lead to variations in anatomy but does not affect the nerve's function. Other muscles mentioned, such as the flexor carpi ulnaris and flexor digitorum profundus, receive innervation from different nerves, which helps delineate the role of the median nerve in the arm's muscular structure. Thus, recognizing the specific innervation of the palmaris longus enhances the understanding of both functional anatomy and clinical relevance in the field of musculoskeletal health

The palmaris longus is indeed innervated by the median nerve, which is significant as it plays a role in wrist flexion and the ability to oppose the thumb. The muscle primarily assists in flexing the skin of the palm and providing tension in the palmar fascia. Its innervation by the median nerve is crucial because this nerve supplies motor function to several muscles in the forearm and hand, particularly those involved in flexion and opposition movements.

Understanding the role of the median nerve is important for comprehending common clinical conditions, such as carpal tunnel syndrome, where the median nerve can become compressed, affecting its ability to innervate the palmaris longus and surrounding muscles. The presence of this muscle is also notable in that not all individuals have it, which can lead to variations in anatomy but does not affect the nerve's function.

Other muscles mentioned, such as the flexor carpi ulnaris and flexor digitorum profundus, receive innervation from different nerves, which helps delineate the role of the median nerve in the arm's muscular structure. Thus, recognizing the specific innervation of the palmaris longus enhances the understanding of both functional anatomy and clinical relevance in the field of musculoskeletal health