Temporal bone canals. Lecture on anatomy.
#Skull #Neurosurgery #Anatomy
Lecture on anatomy - canals of the temporal bone.
The carotid canal (canalis caroticus) begins on the lower surface of the pyramid with the external carotid opening, goes up, bends almost at a right angle, then goes medially and forward. The canal ends with the internal carotid opening at the apex of the pyramid of the temporal bone. The internal carotid artery and nerves of the carotid plexus pass through this canal into the cranial cavity.
The carotid-tympanic canals (canaliculi caroticotympanici), 2-3 in number, branch off from the carotid canal and go into the tympanic cavity. These canals contain the arteries and nerves of the same name.
The muscular-tubular canal (canalis musculotubularis) begins at the apex of the pyramid of the temporal bone, goes back and laterally and opens into the tympanic cavity. A horizontal septum divides it into two parts. Above is the semicanal of the muscle that tenses the eardrum (semicanalis musculi tensoris tympani), which contains the muscle of the same name. Below is the semicanal of the auditory tube (semicanalis tubae auditivae).
The facial canal (canalis facialis) begins in the internal auditory canal. It initially runs transversely in relation to the long axis of the pyramid to the level of the cleft of the canal of the greater petrosal nerve. Having reached the cleft, the canal forms a knee, then goes at a right angle back and laterally. Having passed along the medial wall of the tympanic cavity, the canal turns vertically downwards and ends in the stylomastoid opening. The facial nerve passes through this canal.
The canal of the chorda tympani (canaliculus chordae tympani) comes from the wall of the facial canal in its final section and opens into the tympanic cavity. A nerve, the chorda tympani, passes through this canal.
The tympanic canaliculus (canaliculus tympanicus) begins at the bottom of the petrosal fossa, goes up, pierces the wall of the tympanic cavity. Then the canaliculus passes along its medial wall and ends in the area of the cleft of the canal of the lesser petrosal nerve. The tympanic nerve passes through this canaliculus.
The mastoid canaliculus (canaliculus mastoideus) begins in the jugular fossa and ends in the tympanomastoid fissure. The auricular branch of the vagus nerve passes through this canaliculus.
The best lecture on the anatomy of the temporal bone in 2 parts - • Анатомия височной кости. Часть 1. Лекция п...
The author of this and some other videos is prof. Izranov - / @vladimirizranov
All videos on the anatomy of the skull bones in this playlist - • Анатомия