The medial antebrachial nerve receives sensation from which area?

The medial antebrachial nerve receives sensation from which area?

• A. The lateral forearm
• B. The upper arm
• C. The dorsum of the hand
• D. The medial forearm

Answer: (D)

The medial antebrachial nerve is primarily responsible for providing sensory innervation to the skin of the medial forearm. This nerve branches off from the medial cord of the brachial plexus, and its afferent fibers specifically cover the skin in the region mentioned. The medial forearm area includes the skin covering the medial aspect, which extends from the elbow to the wrist. Understanding its function is crucial, especially in clinical assessments, as an injury to this nerve can lead to diminished sensation or sensory deficits in this specific area. The other areas listed, such as the lateral forearm, upper arm, and dorsum of the hand, are innervated by different nerves; for example, the lateral forearm is mainly innervated by the musculocutaneous nerve, while the dorsum of the hand is more associated with radial nerve innervation. This delineation is important for accurately pinpointing injuries or conducting nerve conduction studies.

The medial antebrachial nerve is primarily responsible for providing sensory innervation to the skin of the medial forearm. This nerve branches off from the medial cord of the brachial plexus, and its afferent fibers specifically cover the skin in the region mentioned. The medial forearm area includes the skin covering the medial aspect, which extends from the elbow to the wrist.

Understanding its function is crucial, especially in clinical assessments, as an injury to this nerve can lead to diminished sensation or sensory deficits in this specific area. The other areas listed, such as the lateral forearm, upper arm, and dorsum of the hand, are innervated by different nerves; for example, the lateral forearm is mainly innervated by the musculocutaneous nerve, while the dorsum of the hand is more associated with radial nerve innervation. This delineation is important for accurately pinpointing injuries or conducting nerve conduction studies.