颈椎脊神经沟内口和颈神经的观测

目的　探讨颈椎脊神经沟内口与颈神经受嵌压的关系。方法　取 2 0具成人尸体的颈椎标本 ,选用完整的成人颈椎 4 4套 ,测量颈椎脊神经沟内口的宽度和颈神经穿过脊神经沟内口时的横径 ,并统计两者之间的比值。结果　颈神经穿过脊神经沟内口处的横径为 :C3 为 2 .7± 0 .7mm ,C42 .7± 0 .7mm ,C5为 2 .8± 0 .8mm ,C64.8± 0 .9mm ,C75 .3± 1.1mm。脊神经沟内口的宽度分别为 :C3 为 5 .8± 1.0mm ,C45 .5± 0 .9mm ,C55 .6± 1.0mm ,C65 .5± 1.1mm ,C76 .2± 1.0mm ;颈神经穿过脊神经沟内口时的横径与脊神经沟内口宽度的比值 :C3 为 1∶2 .15 ,C41∶2 .0 5 ,C51∶1.98,C61∶1.14 ,C71∶1.18。结论　脊神经沟内口与穿过内口的颈神经受累关系密切 ,下颈段 (C6、C7)颈神经受累的机率大于上颈段 (C3 、C4)。

Observation of the Internal Opening of the Cervical Spinal Nerve Sulcus and Nerves

Objective To investigate the relationship between the internal opening of the spinal nerve sulcus and the spinal nerve lesion. Methods The width of the medial opening of spinal nerve sulcus and the outside diameters of spinal nerves were measured on 20 adult cadavers and 44 adult dry cervical vertebrae. the ratios of the spinal nerve external diameters to the width of the medial opening of the spinal nerve sulcus were processed statistically. Results The diameters of the internal opening of spinal nerve sulcus were 2.7±0.7 mm for C 3,2.7±0.7 mm for C 4,2.8±0.8mm for C 5,4.8±0.9 mm for C 6,5.3±1.1 mm for C 7 respectively. The width of the internal opening of the spinal nerve sulcus were 5.8±1.0 mm for C 3,5.5±0.9 mm for C 4,5.6±1.0 mm for C 5,5.5±1.1 mm for C 6,6.2±1.0 mm for C 7 respectively. The ratios of diameters of the spinal nerves to the width of the internal opening of the spinal nerve sulcus were 1∶2.15 for C 3, 1∶2.05 for C 4, 1∶1.98 for C 5, 1∶1.14 for C 6, 1∶1.18 for C 7 respectively. Conclusion The internal opening of the spinal nerve sulcus has intimate relations with the cervical spinal nerve lesions and the rate of the spinal nerve lesion is probably much higher at C 6 and C 7 segments than at C 3 and C 4 segments.