What structure runs through the Tunnel of Guyon, potentially leading to ulnar tunnel syndrome if compressed?

Study for the NPTE Physical Therapist Assistant Exam. Ace the test with comprehensive flashcards and multiple-choice questions. Each query offers hints and detailed explanations. Get thoroughly prepared for your examination!

The structure that runs through the Tunnel of Guyon, which is located between the pisiform and hamate bones in the wrist, is the ulnar nerve and artery. This anatomical passageway serves as a critical route for the ulnar nerve to reach the hand and provide sensory and motor functions to the fifth digit (pinky finger) and part of the fourth digit (ring finger), as well as muscle innervation for the intrinsic muscles of the hand.

Compression of the ulnar nerve within this tunnel can lead to ulnar tunnel syndrome, characterized by symptoms such as tingling, numbness, and weakness in the areas innervated by the ulnar nerve. The location and potential for compression make the Tunnel of Guyon significant in assessing ulnar nerve pathologies.

The other options provided represent nerves and arteries that do not traverse this particular tunnel. The radial nerve and artery are found more laterally in the forearm, the median nerve and artery are primarily at the carpal tunnel, and the peroneal nerve does not pertain to the upper limb at all, instead being associated with the lower leg. Understanding this anatomy is crucial for diagnosing and managing conditions related to nerve compression.

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