Structure which does NOT pass under flexor retinaculum -
Structures superficial to flexor retinaculum

        Palmaris longus
        Ulnar vessels and nerve
        Palmar cutaneous branches of median and ulnar nerves.

 Structures deep to flexor retinaculum

      Median nerve
       Flexor digitorum superficialis
       Flexor digitorum profundus
       Flexor pollicis longus
       Flexor carpi radialis
Ulnar nerve
Median nerve
Flexor digitorum superficialis
Flexor digitorum profundus