<prompt> Structure which does NOT pass under flexor retinaculum -Ulnar nerveMedian nerveFlexor digitorum superficialisFlexor digitorum profundus  <response>: 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 