Fig. 13From: Nerve entrapment syndromes of the upper limb: a pictorial review50-year-old male with flexor pollicis longus palsy. Axial PDFS (a) and PD (b) at the level of the distal forearm demonstrate atrophy and denervation oedema of the pronator quadratus (white arrows), supportive of anterior interosseous nerve (AIN) denervation. A discrete lesion or compressive cause has not been identifiedBack to article page