BONES OF BRAIN BOX (NEUROCRANIUM) CANALS OF TEMPORAL BONE № Name of canal Entrance Exit 1 Canalis caroticus For. caroticum internum 2 Canalis musculotubarius 3 Canalis facialis 4 Canaliculus chordae tympani Canaliculus tympanicus Canaliculi caroticotympanici Canaliculus mastoideus For. caroticum externum Angle between top of pyramis and temporal squama Porus acusticus internus From 3 5 6 7 Contents A. Carotis interna Relation to tympanic cavity --- Tympanic cavity M. tensor tympani; Tuba auditiva + For. stylomastoideum N. facialis (VII) --- N. Chorda tympani + Fossula petrosa From 1 Fissura petrotympanica Hiatus canalis n. petrosa minoris Tympanic cavity N. tympanicus + + Fossa jugularis Fissura tympanomastoidea Aa. et nn. caroticotympanici Auricular branch from vagus nerve (X) ---