In Carpal tunnel syndrome, features are of -
The carpal bones form an arch which is convex on the dorsal side of the hand and concave on the palmar side.
The groove on the palmar side is covered by flexor retinaculum, thus forming carpal tunnel.
Carpal tunnel syndrome is caused by compression of median nerve.
Compression of ulnar nerve
Compression of median nerve under the flexor retinaculum
Anaesthesia over thenar eminence
Atrophy of hypothenar muscles