<prompt> Battles sign is presented in:Anterior cranial fossa fractureMiddle cranial fossa fracturePosterior cranial fossa fractureFracture lesser wing of sphenoid  <response>: Skull base is formed by Anterior cranial fossa Middle cranial fossa Posterior cranial fossa - Formed by frontal bone - Formed temporal sphenoid bone - Formed by occipital bone Cribriform plate: Sieve like structure between anterior cranial fossa nasal cavity Anterior cranial Fossa fracture Middle cranial fossa fracture Posterior cranial fossa fracture - MC type of skull base fracture - Caused by fracture of cribriform plate Clinical feature: - Subconjunctival hematoma - CSF rhinorrhea - Epistaxis - Peritoneal hematoma or Raccoon eyes - Carotico cavernous fistula - Frontal lobe contusion - Caused by fracture of petrous pa of temporal bone Clinical feature: - CSF otorrhea - Paradoxical rhinorrhea - Hemotympanum Battle sign: Bruising or ecchymosis behind ear - Ossicular disruption - VII VIII cranial nerve palsies - Temporal lobe contusion - Caused by fracture of occipital bone Clinical features: - Visual disturbances - VI cranial nerve injury - Jugular foramen syndrome Vernet syndrome: Paresis of IX, X, XI cranial nerves - Basilar aery injury - Occipital contusion 