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a general term for such spaces as the dilated channels for venous blood inside teh cranial cavity or teh air cavities in cranial bones which communicate with the nasal cavities
An organ of teh digestive, respiratory, urogenital, or endocrine systems as well as the spleen, the heart and the blood vessels; hollow and multilayered walled organs
bilateral ridge arching superiorly and posteriorly from zygomatic process. Origin of m. temporalis. Demarcates the superior limit of the temporal fossa.
linear midline depression (internal); lodges parts of superior sagittal sinus (a large vein formed from periosteum and dural membranes)
anterior and lateral depression of roof of orbit which accommodates the lacrimal gland
Supraorbital foramen or notch
in medial 1/3 of supraorbital border and transmits supraorbital nerve, artery, and vein (NVB); occasionally multiple
point of intersection of coronal (fronto-parietal) and sagittal sutures (site of anterior, or bregmatic, fontanelle in the newborn)
point of intersection of lambdoidal (occipito-parietal) and sagittal sutures (site of posterior fontanelle in infants)
Posteriorly, on either side of the sagittal suture; when present, it tranmits veins from the scalp to superior sagittal sinus (emissary veins)
Depression for confluence of sinuses (Torcular of Herophili)
at intersection of superior sagittal, transverse, occipital, and straight venous sinuses; may be on the right or left side of the midline
posterior to each condyle; accomodate posterior margin of superior facet of atlas when head is bent backward
Anterior to foramen magnum, this is the attachment site for fibrous raphe of pharynx in the midline
Hypoglossal canal (anterior condyloid)
at anterior base of each condyle, this canal transmits hypoglossal nerve (XII) and meningeal branch of ascending pharyngeal artery
The jugular notch of the occipital bone, together with the jugular fossa of the temporal bone form a large foramen when these bones are articulated
Sinuses that drain into the jugular bulb:
INferior petrosal venous sinus passes over its lateral margin; the inferior petrosal venous sinus and the sigmoid sinus merge to form the internal jugular vein
a dilation at the top of the internal jugular vein; occupies the jugular fossa of the temporal bone
transmits spinal cord and meninges; vertebral arteries; vertebral venous plexus and CV XI
posterior-superior to external auditory meatus; an instrument may be pushed through the bone here into the tympanic antrum or middle ear chamber
External acoustic (auditory) meatus
bony part of external ear; extends about 2.5 cm anterior-lateral to tympanic membrane
bony projection extending antero-inferiorly from inferior surface of tympanic portion of temporal
large downward projection containing air cells, posterior to tympanic part of temporal bone
anterior surface near apex (above internal aperture of carotid canal). Lodges semilunar gasserian ganglion of CN V, trigeminal
the inferior surface of this fossa forms the anterior part of the jugular foramen; lodges bulb of the internal jugular vein in this deep fossa
fossa in the triangular depression posterior to external orifice of carotid canal; inferior to internal auditory meatus; contains a dural communication between perilymphatic and subarachnoid spaces (fluid-filled)
posterior lateral to internal auditory meatus; transmits ductus endolympathicus (fluid filled) of the inner ear
External auditory meatus
facial canal-bony canal transmitting portions of the facial N through the petrous pyramid to the stylomastoid foramen
deficiency in floor of middle cranial fossa, anterior medial to internal orifice of teh carotid canal. In life, inferior part is filled with fibrocartilage over which courses the internal carotid artery and trhough which passes the nerve of the pterygoid canal (Vidian N) and a meningeal branch of the ascending pharyngeal artery
Hiatus of the facial nerve
anterior surface of petrous portion; transmits greater petrosal nerve (branch of CN VII)
internal acoustic meatus
located on the posterior surface of the petrous portion; transmits the facial nerve (CN VII) and the vestibulocochlear nerve (CN VIII) and the internal auditory branch of the basilar artery
forms anterior boundary of mandibular fossa and attachment of temporomandibular ligament
anterior part receives the mandibular condyle; and the posterior is non-articular and lodges a small portion of the parotid gland
Origin for mm. Stylohyoid, styloglossus, and stylopharyngeus; and attachment for stlyohyold and sytlomandibular ligaments;
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