手内在肌

蚓状肌LumbricalsofthehandTherearefourofthesesmallwormlikemusclesoneachhandThesemusclesareunusualinthattheydonotattachtoboneInsteadtheyattachproximallytothetendonsofflexordigitorumprofundusanddistallytotheextensorexpansions每只手共四条蚓状肌这些肌肉不同其他肌肉地方是它们不是连接在骨上而是连接在屈指深肌腱和伸肌腱扩张部FormOriginInsertionfirstunipennateItoriginatesfromtheradialsideofthemostradialtendonoftheflexordigitorumprofunduscorrespondingtotheindexfinger示指屈指深肌腱桡侧Itpassesposteriorlyalongtheradialsideoftheindexfingertoinsertontheextensorexpansionnearthemetacarpophalangealjoint止于掌指关节附件伸肌腱处secondunipennateItoriginatesfromtheradialsideofthesecondmostradialtendonoftheflexordigitorumprofunduswhichcorrespondstothemiddlefinger屈指深肌腱桡侧Itpassesposteriorlyalongtheradialsideofthemiddlefingerandinsertsontheextensorexpansionnearthemetacarpophalangealjoint止于掌指关节附件伸肌腱处thirdbipennateOneheadoriginatesontheradialsideoftheflexordigitorumprofundustendoncorrespondingtotheringfingerwhiletheotheroriginatesontheulnarsideofthetendonforthemiddlefingerThemusclepassesposteriorlyalongtheradialsideoftheringfingertoinsertonitsextensorexpansion止于掌指关节附件伸肌腱处屈指深肌腱桡侧中指尺侧面fourthbipennateOneheadoriginatesontheradialsideoftheflexordigitorumprofundustendoncorrespondingtothelittlefingerwhiletheotheroriginatesontheulnarsideofthetendonfortheringfinger屈指深肌腱桡侧环指尺侧面Themusclepassesposteriorlyalongtheradialsideofthelittlefingertoinsertonitsextensorexpansion止于掌指关节附件伸肌腱处Innervation神经支配ThefirstandsecondlumbricalsthemostradialtwoareinnervatedbythemediannerveThethirdandfourthlumbricalsmostulnartwoareinnervatedbythedeepbranchoftheulnarnerve第12蚓状肌由正中神经支配第34蚓状肌由尺神经深支支配Bloodsupply血供Therearefourseparatesourcesofbloodsupplyforthesemusclesthesuperficialpalmararchthecommonpalmardigitalarterythedeeppalmararchandthedorsaldigitalartery4条肌肉血供均不相同1掌浅弓2指总动脉3掌深弓4指背动脉Actions功能ThelumbricalmuscleswiththehelpoftheinterosseousmusclessimultaneouslyflexthemetacarpophalangealjointswhileextendingbothinterphalangealjointsofthedigitonwhichitinsertsThelumbricalsareusedduringanupstrokeinwriting与骨间肌协同屈掌指关节伸指间关节拇指对掌肌OpponensPollicisOrigin起点Flexorretinaculumandtuberclesofscaphoidandtrapezium屈肌支持带舟骨结节和大多角骨Insertion止点Lateralsideof1stmetacarpal第1掌骨外侧面Action功能Draws1stmetacarpallaterallytoopposethumbtowardcenterofpalmandrotatesitmedially向手掌牵拉第1掌骨外侧并向内侧旋转Innervation神经支配RecurrentbranchofmediannerveC8andT1C8T1正中神经返支C8T1ArterialSupply血供Superficialpalmarbranchoftheradialartery桡动脉掌浅弓小指对掌肌OpponensDigitiMinimiOrigin起点Hookofhamateandflexorretinaculum钩骨钩和屈肌支持带Insertion止点Medialborderof5thmetacarpal第5掌骨内侧缘Action功能Draws5thmetacarpalanteriorlyandrotatesitbringinglittlefinger5thdigitintooppositionwiththumb牵引第5掌骨向前并旋转它与拇指对掌InnervationDeepbranchofulnarnerveC8andT1C8T1神经支配尺神经深支C8T1ArterialSupply血供Ulnarartery尺动脉拇短屈肌FlexorPollicisBrevisOrigin起点Flexorretinaculumandtuberclesofscaphoidandtrapezium屈肌支持带舟骨大多角骨Insertion止点Lateralsideofbaseofproximalphalanxofthumb近节指骨基底的外侧Action功能Flexesthumb屈拇指Innervation神经支配RecurrentbranchofmediannerveC8andT1C8T1正中神经返支C8T1ArterialSupply血供Superficialpalmarbranchoftheradialartery掌浅弓分支小指短屈肌FlexorDigitiMinimiBrevisOrigin起点Hookofhamateandflexorretinaculum钩骨钩和屈肌支持带Insertion止点Medialsideofbaseofproximalphalanxoflittlefinger小指近节指骨基底尺侧Action功能Flexesproximalphalanxoflittle5thfinger屈小指近节指骨Innervation神经支配DeepbranchofulnarnerveC8andT1C8T1尺神经深支C8T1ArterialSupply动脉血供Ulnarartery尺动脉骨间掌侧肌InterosseousMusclesPalmarOriginPalmar13Palmarsurfacesof2nd4thand5thmetacarpalsunipennatemuscles起点掌侧面245掌骨半羽状肌InsertionPalmar13Extensorexpansionsofdigitsandbasesofproximalphalangesofdigits24and5止点第245近节指骨基底ActionPalmar13Adductdigitstowardaxiallineandassistlumbricalsinflexingmetacarpophalangealjointsandextendinginterphalangealjoints功能内收手指靠近中指与蚓状肌一起屈掌指关节伸指间关节InnervationDeepbranchofulnarnerveC8andT1C8T1神经支配尺神经深支ArterialSupplyPalmar13Palmarmetacarpalarteries血供掌心动脉骨间背侧肌InterosseousMusclesDorsalOriginDorsal14Adjacentsidesoftwometacarpalsbipennatemuscles起点两个掌骨的相邻面InsertionDorsal14Extensorexpansionsandbasesofproximalphalangesofdigits24止点24近节指骨的基底ActionDorsal14Abductdigitsfromaxiallineandactwithlumbricalstoflexmetacarpophalangealjointsandextendinterphalangealjoints功能外展手指远离中指与蚓状肌一起屈掌指关节伸指间关节InnervationDeepbranchofulnarnerveC8andT1C8T1神经支配尺神经深支ArterialSupplyDorsal14Dorsalandpalmarmetacarpalarteries血供掌背动脉拇收肌AdductorPollicisOriginObliqueheadbasesof2ndand3rdmetacarpalscapitateandadjacentcarpalsTransverseheadanteriorsurfaceofbodyof3rdmetacarpal起点斜头第23掌骨基底头状骨及相邻腕骨横头第3掌骨干前表面InsertionMedialsideofbaseofproximalphalanxofthumb止点拇指近节指骨基底的内侧ActionDraws1stmetacarpallaterallytoopposethumbtowardcenterofpalmandrotatesitmedially功能牵拉拇指向手掌移动并向内侧旋转InnervationDeepbranchofulnarnerveC8andT1C8T1神经支配尺神经深支ArterialSupplyDeeppalmararterialarch血供掌深弓拇短展肌AbductorPollicisBrevisOriginFlexorretinaculumandtuberclesofscaphoidandtrapezium起点屈肌支持带舟骨结节大多角骨InsertionLateralsideofbaseofproximalphalanxofthumb止点拇指近节指骨的外侧面ActionAbductsthumbandhelpsopposeit功能外展拇指InnervationRecurrentbranchofmediannerveC8andT1C8T1神经支配正中神经返支ArterialSupplySuperficialpalmarbranchoftheradialartery血供桡动脉的掌浅弓分支小指展肌AbductorDigitiMinimiOriginPisiform起点豌豆骨InsertionMedialsideofbaseofproximalphalanxoflittlefinger止点第5近节指骨基底掌侧ActionAbductslittle5thfinger功能外展第5小指InnervationDeepbranchofulnarnerveC8andT1C8T1神经支配尺神经深支ArterialSupplyUlnarartery血供尺动脉