Median nerve lesion at the wrist causes all of the following, EXCEPT:
Thenar Atrophy
Weakness of Adductor Pollicis
Weakness of 1st and 2nd Lumbricals
Weakness of Flexor Pollicis Brevis
Median nerve lesion at wrist will lead to atrophy of thenar eminence, weakness to flexor pollicis brevis, 1st and 2nd lumbricals. Adductor pollicis is supplied by the ulnar nerve. Ref: Neurology, Marco Mumenthaler, Heinrich Mattle, 4th Edition, Page 749-783; Snell's Clinical Anatomy, 7th Edition, Page 482,483.