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颈动脉窦

颈动脉窦
颈部动脉图,颈动脉窦位于颈内动脉起始处
基本信息
动脉颈动脉
神经舌咽神经颈动脉窦支英语branch of glossopharyngeal nerve to carotid sinus
标识字符
拉丁文sinus caroticus
MeSHD002346
TA98A12.2.04.008、​A12.2.06.003
TA24367
FMAFMA:50094
解剖学术语

颈动脉窦(carotid sinus),是颈内动脉起始处的膨大部分,位于颈内动脉和颈外动脉分叉处的上方,高度在甲状软骨上缘。

颈总动脉末端和血管壁内有压力感受器,能感受血压的变化,进而通过神经传到方式控制血压升降。在一定范围内(动脉血压60~180毫米汞柱,1毫米汞柱=0.133千帕),压力感受器的传入冲动频率与动脉管壁的扩张程度成正比,即动脉血压愈高,动脉管壁被扩张的程度也愈高,压力感受器的传入冲动频率也愈高,所以从感受器的性质,它是血管壁牵张感受器。压力感受器对搏动性的压力变化比非搏动性的压力变化更敏感,此特点与正常机体内动脉血压的搏动性特点是相适应的。

在主动脉弓、胸部升主动脉及颈总动脉等的管壁中都有压力感受器,在颈动脉窦管壁内的称为颈动脉窦压力感受器。

解剖学剥离显示颈动脉窦位置

参考

外部链接

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颈动脉窦
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