Extensor hoodExtensordigitorum tendonDorsal interosseousmuscleFlexor digitorumprofundus tendonFulcrum ofmetacarpophalangeal jointABCContraction of intrinsicmuscles (lumbricals andinterossei muscles)Deep transversemetacarpal ligamentMiddle fingerFulcrums ofinterphalangeal jointsExtension ofinterphalangeal jointsFlexion ofmetacarpophalangeal jointExtendedFlexedUpstrokePalmar ligamentLumbrical muscle
Fig. 7.104 Dorsal interossei (palmar view), right hand.
Fig. 7.105 Palmar interossei (palmar view), right hand.
AdductionAdductionFirst palmarinterosseous(rudimentary: whenpresent is oftenconsidered part ofeither adductorpollicis or flexorpollicis brevis)Insertion intodorsal expansion
Fig. 7.106 Adductor pollicis, right hand.
Oblique head of adductor pollicisTransverse head of adductor pollicisRadial artery(deep palmar arch)Sesamoid bone
Fig. 7.107 Thenar and hypothenar muscles, right hand.
Flexor retinaculumMedian nerveFlexor carpi ulnarisOpponens digiti minimiAbductor digiti minimiFlexor digiti minimi brevisDeep branch ofulnar artery and nerveRecurrent branch of median nerveAdductor pollicis and first palmarinterosseous insert into medialside of extensor hoodFlexor pollicis brevis and abductorpollicis brevis insert into lateral side of extensor hoodExtensor hoodFlexor pollicis brevisThree thenar musclesThree hypothenar musclesOpponens pollicisAbductor pollicis brevis
Fig. 7.108 Lumbrical muscles, right hand.
Flexor retinaculumFlexor digitorumsuperficialis tendon (cut )Flexor digitorumprofundus tendonAttached to dorsal hoodFirst and second lumbricals(unipennate)Third and fourth lumbricals(bipennate)Flexor pollicislongus tendonDeep transversemetacarpal ligament
Fig. 7.109 Arterial supply of the right hand.
Fig. 7.110 Superficial palmar arch, right hand.
Fig. 7.111 Deep palmar arch, right hand.
Radial arteryUlnar arteryUlnar nerveDeep branchof ulnar arteryPerforatingarteryPalmarmetacarpalarteriesDeep palmar archAdductorpollicismuscleRadialis indicisarteryPrincepspollicis arteryFirst dorsalinterosseous muscleFirst dorsalmetacarpalarteryMainly radial arteryDorsalmetacarpalarteriesDorsal carpalnetworkDorsalcarpal archDorsaldigitalarteriesDorsalcarpal branchof ulnar arteryPosteriorinterosseousarteryDorsal viewarcharteryExtensordigitorumtendons(cut)DorsalmetacarpalarteriesFirst dorsalmetacarpalarteryDorsal carpalDorsal carpalbranch of ulnarExtensor pollicis brevisAbductor pollicis longusExtensor pollicis longusExtensor retinaculumExtensor carpiradialis longusRadial artery inanatomical snuffboxExtensor carpiradialis brevisDorsal interosseiDorsal digitalarteriesDorsal branches of properpalmar digital arteries
Fig. 7.112 Dorsal venous arch of the right hand.
Fig. 7.113 Ulnar nerve in the right hand.