Cranial nerve related to apex of the petrous temporal bone -a) VIIIb) VIIc) VId) Ve) IX

Site Cranial Nerves  Sphenoid fissure (superior orbital)  III, IV, first division V, VI  Lateral wall of cavernous sinus  III, IV, first division V, VI, often with proptosis  Retrosphenoid space  II, III, IV, V, VI  Apex of petrous bone  V, VI  Internal auditory meatus  VII, VIII  Ponto cerebellar angle  V, VII, VIII and sometimes IX  Jugular foramen  IX, X, XI  Posterior laterocondylar space  IX, X, XI, XII  Posterior retroparotid space  IX, X, XI, XII and homer  syndrome