Balkany T, Fradis M, Jafek B W, Rucker N C
Department of Otolaryngology, University of Miami School of Medicine, FL 33101.
Otolaryngol Head Neck Surg. 1991 Jan;104(1):20-3. doi: 10.1177/019459989110400105.
Recent studies of the intrinsic vasculature of the cat facial nerve have demonstrated relatively poor blood supply to the labyrinthine segment. In this study, the intrinsic vasculature of the human facial nerve was systematically evaluated in 25 temporal bones and three fresh cadaver nerves. Cross-sectional vessel counts were obtained for the labyrinthine, tympanic, and mastoid segments. Capillary densities for each segment were derived from these data. The labyrinthine segment of the human facial nerve, like that in the cat, contains fewer and smaller intrinsic blood vessels than do the mastoid and tympanic segments. This may indicate that the labyrinthine segment of the facial nerve may be more vulnerable to ischemic damage. In conjunction with the previously demonstrated narrowness of the labyrinthine fallopian canal, these findings support the contention that the labyrinthine segment is a likely site of lesion in Bell's palsy.
最近对猫面神经固有血管系统的研究表明，其迷路段的血液供应相对较差。在本研究中，对25块颞骨和3条新鲜尸体神经中的人类面神经固有血管系统进行了系统评估。获得了迷路段、鼓室段和乳突段的横断面血管计数。各段的毛细血管密度由这些数据得出。与猫的情况一样，人类面神经的迷路段所含的固有血管比乳突段和鼓室段更少、更小。这可能表明面神经的迷路段更容易受到缺血性损伤。结合先前证明的迷路段面神经管狭窄，这些发现支持了迷路段是贝尔麻痹可能的病变部位这一观点。
