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1、GROSSANATOMYOFTHEFOREARM Chenyonghua MainMenu Bonesoftheforearm Superficialmusclesoftheanteriorcompartment Deepmusclesoftheanteriorcompartment Arteriesandnervesoftheanteriorcompartment Superficialmusclesoftheposteriorcompartment Deepmusclesoftheposteriorcompartment Arteriesandnervesoftheposteriorcom
2、partment Acknowledgements Bonesoftheforearm Theradiusproximallyarticulateswiththehumerusattheelbowjoint Distallyitarticulateswiththescaphoidandlunatebonesofthecarpus andwiththeulnaatthedistalradioulnarjoint Theulnaisthemoremedialofthetwobones Itsproximalendarticulateswiththehumerusattheelbowjoint Di
3、stallyitarticulateswiththeradius Itisexcludedfromthewristjointbythearticulardisc Theinterosseousmembranebindtheradiusandtheulnatogether Head Interosseousmembrane Radius Humerus Tuberosityofradius Ulna Head Fig1 Anteriorviewofbonesoftheforearm 总体记忆 前臂共有18块肌肉分为屈肌与伸肌二部分屈肌8块分为浅层与深层浅层有5块深层有3块伸肌10块浅深各5块 前
4、臂8块屈肌 浅层5块旋前圆肌桡侧屈腕肌掌长肌指浅屈肌尺侧屈腕肌 Superficialmusclesoftheanteriorcompartment Titlepage 1 2 3 4 Thesuperficialmusclesoftheanteriorcompartmentincludepronatorteres flexorcarpiradialis palmarislongus andflexorcarpiulnaris Alsoincludedinthisgroupisflexordigitorumsuperficialis Thesuperficialgroupofmusclesal
5、lhavethesameorigin whichisattachedtothemedialepicondyleofthehumerus FORFURTHERDETAILSCLICKONEACHINDIVIDUALMUSCLEBELOW PronatorteresFlexorcarpiradialisFlexorcarpiulnarisFlexordigitorumsuperficialisPalmarislongus notincludedinthediagram Fig2 Showingsuperficialmusclesoftheposteriorcompartment Brachio r
6、adialis Returntomainmenu PronatorTeres Thepronatortereshastwoheads thehumeralheadandtheulnarhead Themediannerveenterstheforearmbetweenthetwoheads Origin Humeralhead Medialepicondyleofthehumerus Ulnarhead Medialborderofthecoronoidprocessoftheulna Insertion Lateralaspectoftheshaftoftheradius Nervesupp
7、ly Mediannerve C6andC7 Action Pronationoftheforearm Flexionoftheforearm Pronatorteres Radius Fig3 Pronatorteres Returntotitlepage Flexorcarpiradialis palmarislongus andflexorcarpiulnaris FlexorcarpiradialisOrigin Medialepicondyleofthehumerus Insertion Baseofthesecondandthirdmetacarpalbones Nervesupp
8、ly Mediannerve C6andC7 Action Flexesthehandatthewristjoint Abductsthehandatthewristjoint PalmarislongusOrigin Medialepicondyleofthehumerus Insertion Flexorretinaculumandpalmaraponeurosis Nervesupply Mediannerve C7andC8Action Flexesthehandatwristjoint Flexorcarpiulnaris Origin Humeralhead Medialepico
9、ndyleofthehumerus Ulnarhead Medialaspectoftheolecranonprocessoftheulnaandtheposteriorborderoftheulna Insertion Pisiformbone hookofthehamate andbaseofthefifthmetacarpalbone Nervesupply Theulnarnerve C7 C8 andT1 Action Flexesthehandatwristjoint Adductsthehandatwristjoint Pronatorteres Flexorcarpiradia
10、lis Palmarislongus Flexorcarpiulnaris Fig4 Flexorcarpiradialisandulnarisandpalmarislongus Returntotitlepage Flexordigitorumsuperficialis Origin Humeroulnarhead Medialepicondyleofthehumerusandthemedialmarginofthecoronoidprocessoftheulna Radialhead Risingfromtheobliquelineontheanteriorsurfaceoftheshaf
11、toftheradius Insertion Themusclebellygivesrisetofourtendonsdistally Eachofthetendonattachestothesidesofthemiddlephalanxofthefourmedialfinger Nervesupply Mediannerve C8andT1 Action Flexesthemiddlephalanxoffingers Flexestheproximalphalanxoffingers weak Flexesthewrist Flexordigitorumsuperficialis Fig5
12、Flexordigitorumsuperficialis Returntotitlepage 前臂8块屈肌 深层3块指深屈肌挴长屈肌旋前方肌 DeepMusclesoftheanteriorcompartment Titlepage Thedeepmusclesoftheforearmcompriseoftheflexorpollicislongus flexordigitorumprofundusandpronatorquadratus Forfurtherdetailsclickoneachoftheindividualmuscles 1 Flexordigitorumprofundus
13、2 Flexorpollicislongus Pronatorquadratusnotshown 1 1 2 Brachio radialis cut Tendonofcarpiflexorradialis cut Fig6 Deepmusclesoftheanteriorcompartment Returntomainmenu Flexordigitorumprofundusandflexorpollicislongus FlexorpollicislongusOrigin Middleoftheanteriorsurfaceoftheshaftoftheradiusandfromthead
14、joiningpartoftheinterosseousmembrane Insertion Thetendonpassesdistallythroughthecarpaltunnelandattachestothedistalphalanxofthethumb Nervesupply Theanteriorinterosseousbranchofthemediannerve Action Flexesthephalangesofthethumb FlexordigitorumprofundusOrigin Upperthree quartersoftheanteriomedialshafto
15、ftheulna Insertion Themuscledividesintofourtendonsjustpriortotraversingthecarpaltunnel Theyattachtothedistalphalanxofthefourfingers Nervesupply Themedialpartissuppliedbytheulnarnerve thelateralportionissuppliedbytheanteriorinterosseousbranchofthemediannerve C8andT1 Action Flexesthefinger Exclusivefl
16、exorofthedistalphalanx Weakflexorofthewrist Flexorpollicislongus Pronatorquadratus Flexordigitorumprofundus Fig7 Flexordigitorumprofundusandflexorpollicislongus Returntotitlepage PronatorQuadratus Origin Lowerquarteroftheanteriorsurfaceoftheshaftoftheulna Insertion Lowerquarteroftheanteriorsurfaceoftheshaftoftheradius Nervesupply Theanteriorinterosseousbranchofthemediannerve Action Pronatestheforearm Pronatorquadratus Flexorcarpiradialis cut Flexorpollicislongus Flexordigitorumprofundus Flexorca
