FESSH prep Compressive neuropathies median nerve

Anterior interosseous nerve (AIN) syndrome

Reviewed by Mateusz Gładysz, MD, FEBOPRAS, FEBHS Last clinically reviewed v1.0

FESSH-004Compressive neuropathies●●○ intermediate

Regarding anterior interosseous nerve (AIN) syndrome:

  1. 1.AIN syndrome presents with combined motor and sensory deficits.

  2. 2.The Kiloh–Nevin sign — inability to form a normal 'O' between thumb and index finger — is a clinical feature of AIN syndrome.

  3. 3.The pronator quadratus is spared in AIN syndrome.

  4. 4.Many cases of nontraumatic 'isolated' AIN palsy are now thought to represent a non-compressive inflammatory neuropathy (a forme fruste of Parsonage–Turner / neuralgic amyotrophy) rather than mechanical compression at the elbow.

  5. 5.MRI may demonstrate denervation oedema within the pronator quadratus in AIN syndrome.

FESSH marking: +1 per correct statement, 0 for blank, −1 for incorrect. Click the same TRUE/FALSE button twice to clear it.