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The external opening of carotid canal (Latin: "apertura externa canalis carotici") is located upon the inferior aspect of the petrous part of the temporal bone.It is situated anterior to the jugular fossa (the two being separated by a ridge upon which the tympanic canaliculus opens inferiorly), [3] and posterolateral to the foramen lacerum.
A jugular foramen is one of the two (left and right) large foramina (openings) in the base of the skull, located behind the carotid canal. It is formed by the temporal bone and the occipital bone. It allows many structures to pass, including the inferior petrosal sinus, three cranial nerves, the sigmoid sinus, and meningeal arteries.
The cervical segment, or C1, or cervical part of the internal carotid, extends from the carotid bifurcation until it enters the carotid canal in the skull anterior to the jugular foramen. Internal carotid artery - dissection. At its origin, the internal carotid artery is somewhat dilated.
carotid canal: 2: internal carotid artery: internal carotid plexus, sympathetics from the superior cervical ganglion: temporal: posterior cranial fossa: internal acoustic meatus: 2: labyrinthine artery: facial nerve (VII), vestibulocochlear nerve (VIII) temporal: posterior cranial fossa: jugular foramen: 2: internal jugular vein, inferior ...
It passes through the petrous part of the temporal bone within the tympanic canaliculus that is situated within the bony ridge separating the carotid canal and the jugular foramen to reach the middle ear. [2] In the tympanic cavity of the middle ear, it ramifies upon the promontory of tympanic cavity to form the tympanic plexus. [2] [1 ...
The tympanic canaliculus (also Jacobson's canaliculus, tympanic canal, inferior tympanic canaliculus, or temporal canaliculus) is a minute canal in the bony ridge that separates the carotid canal and jugular foramen.
The carotid sheath is a condensation of the deep cervical fascia [1]: 578 enveloping multiple vital neurovascular structures of the neck, [2] including the common and internal carotid arteries, the internal jugular vein, the vagus nerve (CN X), and ansa cervicalis. [1]: 578 [2] The carotid sheath helps protects the structures contained therein. [2]
Carotid tubercle (apex) First part of subclavian artery (base) The vertebral artery runs from base to apex (prior to entering the transverse foramen of 6th cervical vertebra). [citation needed] The carotid tubercle separates the vertebral artery which passes directly behind it from the common carotid artery which lies directly in front of it.