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Fig. 7 | Neurosurgical Review

Fig. 7

From: Intradural anterior transpetrosal approach

Fig. 7

The schema of the intradural anterior transpetrosal approach. a The petrous apex is observed after the CSF is drained from the ambient cistern to extend the operative field. GPN, V3, MMA, and SPS cannot be seen in the intradural space. b The dura was cut to expose the petrous apex. The landmarks are the mandibular nerve, greater petrosal nerve, superior petrosal sinus, and arcuate eminence. AC ambient cistern, AE arcuate eminence, GPN greater petrosal nerve, MMA middle meningeal artery, PA petrous apex, SPS superior petrosal sinus, TE tentorium cerebelli, IV trochlear nerve, V3 mandibular nerve

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