The Neurovascular Relationship of the Trigeminal Root and Blood Vessels

Objective To provide anatomical data of trigeminal root for operation of the microvascular decompression (MVD).Method The neurovascular relationship of the 52 cases of formalined adult cadavers was studied after india ink and gelatin had been injected into the internal carotid artery.Result ①The vessels implicated in compression,including the superior cerebellar artery (SCA),the anterior inferior cerebellar artery (AICA) and pontine branch of the basilar artery.In 52 perfused cadaver dissections,compression was found in 46.15% and was located at the root entry zone in 36.54%.The arteries compressing the trigeminal root were most often noted to come from the SCA,and the percentages of it were 21.57%.②The most frequent parent vessels were the pontine branch of the basilar artery (43.5%) and the AICA(41.2%).The trigeminal arteries from the pontine branch of the basilar artery and AICA,most of the former entered into the superior of the trigeminal root (48.98%),but most of the later entered into the inferior of it (57.63%).Conclusion The relationship between the trigeminal root and adjacent blood vessels was close.On the one hand,the former could be compressed by SCA,AICA and the pontine branch of the basilar artery,on the other hand,the later might be parent vessels of the trigeminal artery. [