stylomastoid foramen


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sty·lo·mas·toid fo·ra·men

[TA]
the distal or external opening of the facial canal on the inferior surface of the petrous portion of the temporal bone, between the styloid and mastoid processes; it transmits the facial nerve and stylomastoid artery.
Synonym(s): foramen stylomastoideum [TA]

sty·lo·mas·toid for·a·men

(stī'lō-mas'toyd fōr-ā'mĕn) [TA]
The distal or external opening of the facial canal on the inferior surface of the petrous portion of the temporal bone, between the styloid and mastoid processes; it transmits the facial nerve and stylomastoid artery.

sty·lo·mas·toid for·a·men

(stī'lō-mas'toyd fōr-ā'mĕn) [TA]
Distal or external opening of the facial canal on the inferior surface of the petrous portion of the temporal bone, between the styloid and mastoid processes; it transmits the facial nerve and stylomastoid artery.
References in periodicals archive ?
Facial nerve diameter was measured proximally at the stylomastoid foramen, distally just proximal to the pes anserinus, and midway between these two points.
The stylomastoid foramen may also be displaced anteroraterally in atretic ears, making the facial nerve more susceptible to intraoperative injury.
To our knowledge, this is the first report to apply the approach to identify the FN in the stylomastoid foramen with canal wall up mastoidectomy to remove the recurrent FBCA, and this might facilitate the complete dissection of the scar and lesion around the main trunk of the FN in the parotid gland.
It then curves (the pyramidal bend) to course vertically through the mastoid bone and exits at the stylomastoid foramen (figure 2).
Facial nerve schwannomas have a predilection for the area of the geniculate ganglion, although they can occur at any point along the nerve between its origin in the pons and its exit in the stylomastoid foramen and parotid segment.
[23] Likewise, in one of the two patients reported by Avery and Sprinkle, no facial nerve was found close to the stylomastoid foramen. [9] Koide et al were able to identify the peripheral branches of the facial nerve in their patient, but the main trunk could be found only at the stylomastoid foramen.
The facial nerve was decompressed from the stylomastoid foramen up to the geniculate ganglion, and it appeared to be normal.