Role of Electrodiagnosis in Ulnar Nerve Entrapments: Difference between revisions
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===== Entrapment of Ulnar Nerve ===== | ===== Entrapment of Ulnar Nerve ===== | ||
[[Ulnar nerve entrapments]] are the second most common entrapment in Upper extremity after Median Nerve entrapment at Carpal Tunnel. Common causes include pregnancy, diabetes, occupations including repetitive elbow and wrist movements, acute trauma, iatrogenic injuries, cycling, and other recreational sports <ref>Vij N, Traube B, Bisht R, Singleton I, Cornett EM, Kaye AD, Imani F, Erdi AM, Varrassi G, Viswanath O, Urits I. An update on treatment modalities for ulnar nerve entrapment: a literature review. Anesthesiology and Pain Medicine. 2020 Dec;10(6).</ref>.Ulnar Nerve entrapments mostly occurs at two sites | [[Ulnar Nerve Entrapment|Ulnar nerve entrapments]] are the second most common entrapment in Upper extremity after Median Nerve entrapment at Carpal Tunnel. Common causes include pregnancy, diabetes, occupations including repetitive elbow and wrist movements, acute trauma, iatrogenic injuries, cycling, and other recreational sports <ref>Vij N, Traube B, Bisht R, Singleton I, Cornett EM, Kaye AD, Imani F, Erdi AM, Varrassi G, Viswanath O, Urits I. An update on treatment modalities for ulnar nerve entrapment: a literature review. Anesthesiology and Pain Medicine. 2020 Dec;10(6).</ref>.Ulnar Nerve entrapments mostly occurs at two sites | ||
# Ulnar Nerve Entrapment in Cubital Tunnel - This is an entrapment of the nerve in the cubital tunnel and occurs mainly due to compression by Osborne's ligament<ref name=":0" />, larger coronoid process in men with lesser subcutaneous fats around it compared to women makes them more vulnerable to entrapment compared to women<ref>Contreras MG, Warner MA, Charboneau WJ, Cahill DR. Anatomy of the ulnar nerve at the elbow: potential relationship of acute ulnar neuropathy to gender differences. Clinical Anatomy: The Official Journal of the American Association of Clinical Anatomists and the British Association of Clinical Anatomists. 1998;11(6):372-8.</ref>,and trauma. | # Ulnar Nerve Entrapment in Cubital Tunnel - This is an entrapment of the nerve in the cubital tunnel and occurs mainly due to compression by Osborne's ligament<ref name=":0" />, larger coronoid process in men with lesser subcutaneous fats around it compared to women makes them more vulnerable to entrapment compared to women<ref>Contreras MG, Warner MA, Charboneau WJ, Cahill DR. Anatomy of the ulnar nerve at the elbow: potential relationship of acute ulnar neuropathy to gender differences. Clinical Anatomy: The Official Journal of the American Association of Clinical Anatomists and the British Association of Clinical Anatomists. 1998;11(6):372-8.</ref>,and trauma. | ||
Revision as of 09:10, 26 November 2023
Original Editor - Nehal Shah
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Introduction[edit | edit source]
Anatomy of Ulnar Nerve[edit | edit source]
Ulnar nerve is the continuation of Medial Cord of Brachial Plexus (C8-T1). It passes in the arm medial to brachial artery . It then enters cubital tunnel and enters the forearm. It supplies Flexor Carpi Ulnaris (FCU) and Flexor Digitorum Profundus (FDP) for ring and little finger. It enters the wrist from Guyon's canal where it divides into Deep Motor branch which supplies Abductor Digiti Minimi, third and fourth Lumbrical, Interossei, Deep head of Flexor Pollicis Brevis and Adductor Pollicis and a Superficial Sensory branch which gives sensory innervation to ulnar border of the ring finger and little finger [1]. Two sensory nerves arise from the Ulnar nerve in the forearm - Dorsal Ulnar Cutaneous Nerve which provides sensory innervation to the dorsal aspect the medial one and a half fingers and the associated dorsal hand area and a Palmar cutaneous nerve that provides innervation to the medial half of the hand.
Entrapment of Ulnar Nerve[edit | edit source]
Ulnar nerve entrapments are the second most common entrapment in Upper extremity after Median Nerve entrapment at Carpal Tunnel. Common causes include pregnancy, diabetes, occupations including repetitive elbow and wrist movements, acute trauma, iatrogenic injuries, cycling, and other recreational sports [2].Ulnar Nerve entrapments mostly occurs at two sites
- Ulnar Nerve Entrapment in Cubital Tunnel - This is an entrapment of the nerve in the cubital tunnel and occurs mainly due to compression by Osborne's ligament[1], larger coronoid process in men with lesser subcutaneous fats around it compared to women makes them more vulnerable to entrapment compared to women[3],and trauma.
- Ulnar Nerve Entrapment in Guyon's Canal - Compression of Ulnar nerve at wrist occurs in Guyon's Canal mainly due to occupations involving repetitive wrist movements and cycling activities apart from trauma. Guyon's canal is divided into three zones. Zone 1 lies proximal to the bifurcation of the nerve into Deep Palmar branch and Superficial Sensory branch. Zone 2 lies distal to zone 1 and surrounds motor branch. Zone 3 is distal to zone 2 and it surrounds only the sensory branch[1]
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Resources[edit | edit source]
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References[edit | edit source]
- ↑ 1.0 1.1 1.2 Davis DD, Kane SM. Ulnar Nerve Entrapment.
- ↑ Vij N, Traube B, Bisht R, Singleton I, Cornett EM, Kaye AD, Imani F, Erdi AM, Varrassi G, Viswanath O, Urits I. An update on treatment modalities for ulnar nerve entrapment: a literature review. Anesthesiology and Pain Medicine. 2020 Dec;10(6).
- ↑ Contreras MG, Warner MA, Charboneau WJ, Cahill DR. Anatomy of the ulnar nerve at the elbow: potential relationship of acute ulnar neuropathy to gender differences. Clinical Anatomy: The Official Journal of the American Association of Clinical Anatomists and the British Association of Clinical Anatomists. 1998;11(6):372-8.
