手掌分区与正中神经和尺神经

Division of palmregarding median nerve and ulnar nerve

目的 :为研究手掌病变、作神经吻合及阻滞麻醉提供解剖学基础。方法 :手掌借 5条横平行线和掌纵纹 ,分为桡、尺两部及6个区。解剖并观察正中神经和尺神经在手掌各区的分支及分布。结果 :正中神经掌皮支和主支位于Ⅰ、Ⅱ区 ,主支在Ⅲ区形成 4种形态的伞形结构 ,在C线处发出第 1～ 3指掌侧总神经。正中神经返支由伞形结构桡侧发出 ,经B1点入大鱼际。尺神经主支和掌皮支位于Ⅰ区。浅支在A1点分为指掌侧总神经和小指掌侧固有神经 ,深支于A1点入手掌Ⅱ区深面。指掌侧总神经在E线分为指掌侧固有神经。结论 :手掌神经有按区分布的特点 ,有助于手掌损伤离断神经的寻找和吻合 ,以及手掌神经阻滞麻醉的精确定位。

Objective:Toprov ideana tomic albas isfor thereseac hofpa lmard isease ,ne rvousanas omosisand blocking anaesthesiaof palm .Methods:Thep almsweredividedinto 6regionsand 2 parts(th eradi alandth eulnarparts)bythe 5 par allelline sandthelongitu dinalstri aoft hepalm .The palmwa sa natomized ;thebranc hesandd istribu tionofthem edianne rvean dtheul arnervew ereobserved . Results:Thetrun kandthep almarcutane ousbran chofme diannervearelocatedinⅠandⅡregions.Thetrunkofmediannerveforms 4kindsoftheumbrellastructureinⅢregionandbranchesout1 3commonpalmardigitalnervesattheCline.The r adialpartoftheum brell astru ctureb ranches outtherecurre ntbr ancho fmed iannerve .Therecurr entbranc hgeti ntotheth enarat B1point.Thetrunkand thepalm arcut aneous branch ofulnar nervea relo catedinⅠregion .Theco mmonpalmardigitalnerveandtheproperp almardigitalnerve aredisengag edfro mthesuperfi cialbranchatA1pointan dthedeepbranchg etintothe deeppartof palm atA1point.Thecommonpalmar digita lnervebr anchouttheproperpalmardigitalnervesatEline.Conclusion :Thener vesofpalmhaveach aracteristicdistributionac cordin gtoitsregion ,whichis usefulf orsee kingandan astom osingthed iscon nect edner vesofpalm andforaccuratelocationofblockanaes thesiaofpalm .