Anatomical Variations of the Intrapetrous Portion of the Facial Nerve
| Autor: | Fernando Ruiz-Juretschke, Ignacio Aristegui, Carlos Martín-Oviedo, Miguel Arístegui, Roberto García-Leal |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Histology Mandibular nerve 03 medical and health sciences 0302 clinical medicine Reference Values medicine.artery Temporal bone medicine Humans Ecology Evolution Behavior and Systematics Sigmoid sinus Semicircular canal business.industry Cranial nerves Anatomic Variation Anatomy Facial nerve Facial Nerve 030104 developmental biology medicine.anatomical_structure Geniculate ganglion Internal carotid artery business 030217 neurology & neurosurgery Biotechnology Petrous Bone |
| Zdroj: | Anatomical record (Hoboken, N.J. : 2007). 302(4) |
| ISSN: | 1932-8494 |
| Popis: | The intrapetrous facial nerve has the second longest intraosseous course of all cranial nerves, after the mandibular nerve. But it is by far the most complex considering the anatomical structures closely related to it. The auditory and vestibular portions of the inner ear, the dura of the middle fossa and posterior fossa, the sigmoid sinus and jugular bulb, and the internal carotid artery are close enough to merit attention. This article includes an anatomical study on 100 temporal bones with anatomical references as seen from the middle fossa and from the transmastoid approaches that may help identifying the facial nerve and protecting surrounding structures. Anatomical variability was present and noteworthy when considering the venous drainage system through the temporal bone and the mastoid pneumatization. The distance from the geniculate ganglion to the hiatus falopii offered the highest variability with a range of 0 to 7.75 mm and a mean of 3.30 mm. The geniculate ganglion was dehiscent in 20.8% of the specimens and the superior semicircular canal was spontaneously blue-lined in 27% of the cases. Through the transmastoid approach, the highest variability was found regarding the distance between the vertical portion of the facial nerve and the jugular bulb (range from 1.5 to 10.0 mm), the sigmoid sinus (range from 0 to 13.25 mm) and the internal carotid artery (range from 6.0 to 15.0 mm). This study highlights the importance of the relative variability of the facial nerve to other surrounding structures within the petrous portion of the temporal bone. Anat Rec, 302:588-598, 2019. © 2018 Wiley Periodicals, Inc. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text