Anterior interosseous neuropathy (AIN): causes

Written and reviewed by Dr Ibrahim Imam, Consultant Neurologist. Last reviewed .

Anterior interosseous neuropathy (AIN): causes. Lacertus fibrosus, Deep head of pronator teres. Fully referenced neurology checklist.

Compressive causes

  • Lacertus fibrosus
  • Deep head of pronator teres
  • Fibrous end of the arch of flexor digitorum superficialis
  • Fibrous bands
  • Enlarged bicipital tendon bursa
  • Thrombosed branch of the radial artery
  • Thrombosed ulnar artery
  • Bone spurs
  • Gantzer’s muscle: accessory head of FPL
  • Fascicular constrictions above the elbow

Other causes

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Synonym

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References

  1. Aljawder A, Faqi MK, Mohamed A, Alkhalifa F. Anterior interosseous nerve syndrome diagnosis and intraoperative findings: a case report. Int J Surg Case Rep 2016; 21:44-47.
  2. al-Qattan MM. Gantzer's muscle. An anatomical study of the accessory head of the flexor pollicis longus muscle. J Hand Surg Br 1996; 21:269-270.
  3. Degreef I, De Smet L. Anterior interosseous nerve paralysis due to Gantzer's muscle. Acta Orthop Belg 2004; 70:482-484.
  4. Sneag DB, Arányi Z, Zusstone EM, et al. Fascicular constrictions above elbow typify anterior interosseous nerve syndrome. Muscle Nerve 2020; 61:301-310.
  5. Ulrich D, Piatkowski A, Pallua N. Anterior interosseous nerve syndrome: retrospective analysis of 14 patients. Arch Orthop Trauma Surg 2011; 131:1561-1565. 
  6. And 8 more. Subscribe to see the full list

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