Flexor retinaculum of the hand
The flexor retinaculum is a strong, fibrous band that covers the carpal bones on the palmar side of the hand near the wrist.On the radial side of the retinaculum is the tendon of the flexor carpi radialis, which lies in the groove on the greater multangular between the attachments of the ligament to the bone.The flexor retinaculum is the roof of the carpal tunnel, through which the median nerve and tendons of muscles which flex the hand pass.It is because of this that pianists, meat cutters, and people with jobs involving extensive typing are at particularly high risk.The intent is that this will lengthen the flexor retinaculum enough to accommodate inflamed or damaged tendons and reduce the effects of compression on the median nerve.
Anatomical terminologyfibrouscarpal bonescarpal tunnelradiuspisiform bonehook of the hamate bonescaphoid bonetrapezium bonepalmar carpal ligamentpalmar aponeurosisulnar arteryulnar nerveulnar nervesflexor carpi radialispalmaris longusflexor carpi ulnarisshort muscles of the thumblittle fingermedian nervecarpal tunnel syndromePeroneal retinaculaExtensor retinaculum of the handpublic domainGray's AnatomyMusclesShoulderdeltoidrotator cuffsupraspinatusinfraspinatusteres minorsubscapularisteres majorfasciadeltoid fasciasupraspinous fasciainfraspinous fasciacompartmentsanteriorcoracobrachialisbicepsbrachialisposteriortriceps brachiianconeusarticularis cubitiaxillary sheathaxillary fasciabrachial fascialateralmedialquadrangular spacetriangular spacetriangular intervalForearmpronator teresflexor digitorum superficialispronator quadratusflexor digitorum profundusflexor pollicis longusmobile wadbrachioradialisextensor carpi radialis longusbrevisextensor digitorumextensor digiti minimiextensor carpi ulnarissupinatoranatomical snuffboxabductor pollicis longusextensor pollicis brevisextensor pollicis longusextensor indicisbicipital aponeurosisextensorflexorantebrachial fasciacubital tunnelosborne's ligamentthenaropponens pollicisflexor pollicis brevisabductor pollicis brevisadductor pollicishypothenaropponens digiti minimiflexor digiti minimi brevisabductor digiti minimipalmaris brevislumbricaldorsalpalmarextensor retinaculumextensor expansion