Not under flexor retinaculum
Structures deep to flexor retinaculum1) Lateral compament : Flexor carpi radialis tendon with its synol sheath lodged in the groove on the palmar surface of trapezium.2 Medial compament : (carpal tunnel proper).Structures superficially to flexor retinaculum 1) Palmaris longus tendon continuous with apex of palmar aponeurosis.2) Palmar cutaneous branch of median nerve.3) Palmar cutaneous branch of ulnar nerve.4) Ulnar nerve.5) Ulnar vessels protected superficially by volar carpal ligament (superficial pa of the flexor retinaculum).
Median nerve
Ulnar nerve
FDS
FPL