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| The Facial Nerve (CN7) |
| The bony canal containing the facial nerve can be followed on axial and coronal CT images. This section provides a basic approach for identifying and tracing the course of the facial nerve through the temporal bone. |
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| Intracanalicular and Cisternal Segments |
| The intracanalicular and cisternal segments are best visualized on MRI. |
Remember, in the anterior internal
auditory canal (IAC), CN 7 is
superior and the cochlear nerve
inferior
“seven up, coke down” |
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The vestibular branches of CN 8
(superior and inferior) are posterior and “keep you from falling back” |
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| Intracanalicular and Cisternal Segments |
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| Superior IAC |
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| Inferior IAC
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