人肱桡肌和股薄肌的肌构筑、肌内神经肌梭分布与神经入肌点的分析

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1、superficialmuscleontheradialsideoftheforearm．Itarosefromtheuppertwo—thirdsofthelateralsupracondylarridgeofthehumerus，andthelateralintermuscularseptum，andlimitedabovebythegroovefortheradialnerve．InterposingbetweenitandtheBrachialisweretheradialnerveandtheanastomo

2、sisbetweentheanteriorbranchoftheprofundaarteryandtheradialrecurrent．Thefibersendabovethemiddleoftheforearminafiattendon，whichwasinsertedintothelateralsideofthebaseofthestyloidprocessoftheradius．ThetendoncrossednearitsinsertionbythetendonsoftheAbductorpollicislon

3、gusandExtensorpollicisbrevis；onitsulnarsideistheradialartery(2)TheGracilisWaSthemostmuscleonthemedialsideofthethigh．ItWasthinandflattened，broadabove，narrowandtaperingbelow．Itarosebyathinaponeurosisfromtheanteriormarginsofthelowerhalfofthesymphysispubisandtheuppe

4、rhalfofthepubicarch．Thefibersranverticallydownward，andendinaroundedtendon，whichpassedbehindthemedialcondyleofthefemur,curvedaroundthemedialcondyleofthetibia,whereitbecameflattened，andWaSinsertedintotheupperpartofthemedialsurfaceofthebodyofthetibia,belowthecondyl

5、e．Afewofthefibersofthelowerpartofthetendonwereprolongedintothedeepfasciaoftheleg．Atitsinsertion，thetendonwassituatedimmediatelyabovethatoftheSemitendinosus，anditsupperedgewasoverlappedbythetendonoftheSartorius，withwhichitWaSinpartblended．ItWaSseparatedfromthetib

6、ialcollateralligamentoftheknee-joint，byabursacommontoitandthetendonoftheSemitendinosus．2Thestructuralfeatureofbarchioradialisandgracilis(1)barchioradialis：muscleweight(45．6+5．7)g，MuscleLength(25．6-t-0．7)enl，FiberLength16．1cm，CrossSectionArea2．68cm2；(2)gracilis：m

7、uscleweight(65．5±8．5)g．MuscleLength(31．0±2．0)cm，FiberLengthl9．7cm，CrossSectionArea3．20cm23．Thedistributionofintramuscularnerves：(1)ThenerveofBarchioradialiscamefrommusculospiralnerve，includedsingle(70％)anddouble(30％)．Single：thenervebranchedinto53branches(1ateral

8、branch，intermedialbranchandmedialbranch)：Thelateralbranchbranchedinto2secondarybranches：onereachedthelateralpartofthebarchioradialis；theotherreachedthesuperficialsurf