Skull Flashcards

1
Q

crista galli is site of attachment of —

A

falx cerebri

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2
Q
what structures pass through the following:
foramen rotundum
foramen ovale
foramen spinosum
foramen lacerum
A

f. r: maxillary n.
f. o: mandibular, accessory meningeal artery, lesser petrosal nerve.
f. s: middle meningeal artery and vein, meningeal branch of mandibular nerve
f. l: greater petrosal nerve, allows internal carotid to pass its posterior wall.

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3
Q

where is the groove for middle meningeal artery?

A

middle cranial fossa

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4
Q

where does external acoustic meatus lead to?

A

tympanic membrane

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5
Q

lesser wing of sphenoid is in — whereas greater wing is in—

A

anterior cranial fossa, middle cranial fossa.

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6
Q

—- overlies middle ear, and —- overlies inner ear in middle cranial fossa.

A

tegmun tympani

arcuate eminence.

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7
Q

role of hamulus?

A

support for tendons of soft palate muscles

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8
Q

scaphoid fossa is the feature of —–.

A

middle pterygoid plate.

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9
Q

what attaches to pharyngeal tubercle?

A

pharyngeal constrictor muscles

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10
Q

occipital condyle is the site of —— with —–.

A

articulation with atlas

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11
Q

what passes through condylar canal?

A

emissary vein.

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12
Q

facial nerve exits through —–.

A

stylomastoid foramen

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13
Q

petrotympanic fissure houses —–.

A

chorda tympani

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14
Q

palato pharyngeal canal is posterior to —–.

A

nasal septum

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15
Q

pterygoid canal is posterior to —–.

A

medial pterygoid plate.

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16
Q

spine of sphenoid is located between —– and —–.

A

foramen spinosum and carotid canal (ventral skull).

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17
Q

foramen spinosum is posterior to ——- on ventral skull.

A

lateral pterygoid plate.

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18
Q

ethmoid foramina are on the — side of orbit.

A

medial

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19
Q

sphenoid sinus is beneath—–

A

hypophyseal fossa

20
Q

mylohyoid groove is for —-, whereas mylohyoid line is for —-.

A

mylohyoid nerve

mylohyoid muscle

21
Q

mandibular foramen passes—–.

A

inferior alveolar nerve branch of V3.

22
Q

mylohyoid nerve is branch of —–.

A

inferior alveolar nerve.

23
Q

sss is between — and — layers.

A

periosteal and meningeal layers.

24
Q

The floor of middle cranial fossa is —–, including medially the —- and —- laterally.

A

body of sphenoid
hypophyseal fossa
greater wings of sphenoid

25
groove for middle meningeal artery is on ---- of temporal bone. Impression of trigeminal ganglion may be visible on ----- of temporal bone.
squamous | medial petrous
26
organs of hearing and balance are in ---- temporal bone.
posterior end of petrous
27
arcuate eminence is a bump on ---- bone, tegmun tympani is an indentation ----- to arcuate eminence.
petrous bone | anterolateral
28
internal acoustic meatus houses:
facial and vestibulo
29
jugular foramen transmits:
glosso, vagus, accessory, internal jugular
30
hamulus is the hook on anteroinferior -----.
medial plate of pterygoid
31
superior and middle chonchae are part of ---- bone, but inferior is ---- bone.
ethmoid bone, | separate bone
32
palatopharyngeal canal is ---- to -----.
posterior to nasal septum
33
groove for auditory tube on ventral skull is the impression of which part?
cartilaginous part of auditory tube
34
foramen rotundum is not visible from -----aspect, because it opens into----
inferior skull, | pterygopalatine fossa.
35
----- ligament attaches to spine of sphenoid.
sphenomandibular ligament
36
what nerve goes through superior orbital fissure?
opthalamic nerve branches; lacrimal, nasociliary, | also trochlear, abducens, occulomotor
37
what nerve goes through inferior orbital fissure?
maxillary nerve from pterygopalatine fossa
38
where do branches of opthalamic nerve go through in the orbit?
frontal-branches into supraorbital and supratrochlear Lacrimal-to lacrimal gland Nasociliary- to iris, ciliary body, also branches into anterior/pos ethmoidal nerves and becomes infratrochlear nerve.
39
what nerve/branch passes through zygomatico-orbital foramen?
zygomatico-orbital branch of maxillary nerve.
40
sphenoid emissary foramen is ----- to ---- foramen.
anteromedial to foramen ovale.
41
paranasal sinuses open into-----. | Mastoid hair cells are not paranasal sinuses because they ----.
nasal cavity | do not open into nasal cavity
42
mental foramina are on external surface below-----.
2nd premolars
43
are the two layers of dura fused all the way?
no, on places where vessels e.g. dural sinuses, nerves e.g. peripheral trigeminal and its ganglion are located, AND where meningeal layer forms foldings
44
dural sinuses ---- valves.
lack
45
sella diaphragm is continuous with ---- of ----.
dura of middle cranial fossa
46
``` state the foramina the following nerves pass through: oculomotor trochlear trigeminal abducens facial vestibulo glosso vagus accessory hypoglossal ```
3. superior orbital fissure (sof) 4.sof 5. V1-SOF V2-foramen rotundum=>pterygopalatine fossa =>inferior orbital fissure=>orbit, branches exit orbit via zygomatico-orbital foramen & infraorbital canal. V3- foramen ovale 6. sof 7. internal acoustic m. to stylomastoid foramen. Chorda tympani emerges separately from petrotympanic fissure. 8. internal a.m. 9. jugular f. 10. j.f 11. j.f. 12. hypoglossal canal