<unk><unk>  nerve (C5-T1), also known as the volar<unk>  nerve, is a branch of the median nerve that supplies motor innervation to the deep forearm muscles
Compression or injury can cause an isolated AIN palsy
Brachial plexopathy or cervical spine pathologies may present with combined median nerve palsies
Peripheral neuropathy
Entrapment between forearm muscles or tendons
FPL tendon rupture (usually with severe rheumatic disease)
Trauma
Forearm fracture
Pediatric - supracondylar fracture
Space occupying lesions
Post-viral neuritis
Parsonage-Turner syndrome
Iatrogenic
Entrapment between forearm muscles or tendons
FPL tendon rupture (usually with severe rheumatic disease)
Trauma
Forearm fracture
Pediatric - supracondylar fracture
Space occupying lesions
Forearm fracture
Pediatric - supracondylar fracture
Parsonage-Turner syndrome
Anterior interosseous neuropathy
Carpal tunnel syndrome
Posterior interosseous neuropathy
Pronator teres syndrome
Ulnar neuropathy
Long thoracic neuropathy
Suprascapular neuropathy
Radial neuropathy at the spiral groove 