舌咽神经根及其滋养动脉的显微解剖学研究

Microanatomical study on the nutrient artery of glossopharyngeal nerve root

目的观察延髓区舌咽神经根滋养动脉的来源及与神经根的毗邻关系,探讨原发性舌咽神经痛的可能病因。方法采用成人头颅标本10例20侧,在手术显微镜下对双侧滋养动脉进行解剖学观察和测量。结果舌咽神经根的滋养动脉主要由小脑下后动脉、延髓背外侧动脉和小脑下前动脉3支或2支共同组成,其中14侧来自小脑下后动脉,占70%,共52支;其次,9侧来自延髓背外侧动脉,占45%,共21支;8侧来自小脑下前动脉,占40%,共18支。舌咽神经根与以上3支滋养动脉接触或压迫的约占30%。结论部分舌咽神经痛病因可能与舌咽神经根和滋养动脉接触或压迫有关。

Objective To observe the origin of nutrient artery of glossopharyngeal nerve root in the area of medulla oblongata, and its relationship with the glossopharyngeal nerve root, in order to explore the cause of primary glossopharyngeal neuralgia. Methods Twenty sides of skull of ten cadaver eases were dissected. The nutrient arteries were observed and measured by the operative microscope. Results Of all the nutrient arteries of glossopharyngeal nerve root, fifty-two branch arteries were derived from the posterior inferior eerebellar artery （14 sides, 70% ）, twenty-one from the dorsolateral medullary artery （9 sides, 45% ）, and eighteen from the anterior inferior eerebellar artey （8 sides, 40% ）. About 30% Glossopharyngeal nerve roots were found being contacted and compressed by their surrounding arteries. Conclusion The cause of some primary glossopharyngeal neuralgia is related to the contact and compress of nutrient artery of the glossopharyngeal nerve root.