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| Ulnar Nerve Compression Syndromes Guyon Syndrome | Entrapment Syndrome, Ulnar Nerve | External Compression Syndrome, Ulnar Nerve | Ulnar Nerve Compression | Ulnar Nerve Entrapment | Ulnar Nerve Entrapment Syndrome | Ulnar Nerve Entrapment at the Wrist | Guyon Syndromes Ulnar neuropathies caused by mechanical compression of the nerve at any location from its origin at the BRACHIAL PLEXUS to its terminations in the hand. Common sites of compression include the retroepicondylar groove, cubital tunnel at the elbow (CUBITAL TUNNEL SYNDROME), and Guyon's canal at the wrist. Clinical features depend on the site of injury, but may include weakness or paralysis of wrist flexion, finger flexion, and ulnar innervated intrinsic hand muscles, and impaired sensation over the ulnar aspect of the hand, fifth finger, and ulnar half of the ring finger. (Joynt, Clinical Neurology, 1995, Ch51, p43) |