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809 - Exam Block 2 > Osteology Lab 5A - Cranial Cavity > Flashcards

Osteology Lab 5A - Cranial Cavity Flashcards

1
Q

What is filled by the frontal lobes of the cerebral hemispheres

A

anterior cranial fossa

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2
Q

What 4 bones form the anterior cranial fossa

A

Orbital plates of the frontal bone

Lesser wings of sphenoid bone

Body of the sphenoid bone

Ethmoid bone

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3
Q

The Middle Cranial Fossa is formed by what 3 bones

A

Body of the sphenoid

Greater wings of the sphenoid

Temporal bones

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4
Q

The midline depression of the middle cranial fossa is filled by the

A

pituitary gland

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5
Q

The lateral depressions of the middle cranial fossa is filled by the

A

temporal lobes of the cerebral hemispheres

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6
Q

What is the largest & deepest cranial fossa

A

Posterior Cranial Fossa

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7
Q

What travels through the foramen magnum of the occipital bone

A

brainstem to spinal cord
vertebral arteries
CN XI

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7
Q

The Posterior Cranial Fossa is filled by the ________ and __________

A

brainstem (midline) &
cerebellum (lateral depressions)

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7
Q

Bony processes located on external surface anterolateral to the foramen magnum

A

Occipital condyles

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8
Q

The posterior cranial fossa is formed primarily by what 2 bones

A

Temporal bones

Occipital bones

(With small contributions from the body of the sphenoid & parietal bones)

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8
Q

What supports the pons and medulla regions of the brainstem

A

Basilar part of the occipital bone

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8
Q

What travels along the internal surface of the basilar part of the occipital bone

A

Basilar artery

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9
Q

What articulates with the C1 vertebra (atlas)

A

Occipital condyles

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10
Q

Palpable bony projection in the midline that closely approximates the location of the confluence of the sinuses

A

External occipital protuberance

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11
Q

What canal internally lies along the anterolateral edges of the foramen magnum

A

Hypoglossal canal

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12
Q

What canal externally lies along the anterior aspect
of the occipital condyles

A

Hypoglossal canal

13
Q

Prominence in the midline posterior to the foramen magnum that is overlaid by the confluence of sinuses

A

Internal occipital protuberance

14
Q

2 attachment sites for the cerebral falx

A

Internal occipital protuberance
Frontal Crest

15
Q

Raised line extending inferiorly from the internal occipital protuberance that is the attachment site for the cerebellar falx

A

Internal occipital crest

16
Q

What bone surrounds the inner ear

A

petrous part of the temporal bone

17
Q

What bone is located in the cranial base between the
sphenoid & occipital bones

A

petrous part of the temporal bone

18
Q

What bone forms a prominent ridge along the
internal aspect of the cranial base which separates the middle & posterior cranial
fossa

A

petrous part of the temporal bone

19
Q

What is the opening located along the posterior aspect of the petrous ridge

A

Internal acoustic meatus

20
Q

What transmits CN VII and CN
VIII

A

Internal acoustic meatus

21
Q

What permits passage of the internal carotid artery & the postganglionic sympathetic fibers traveling on it

A

carotid canal

22
Q

What lies in between the petrous ridge of the temporal bone and the occipital bone

A

Jugular foramen

23
Q

What does CN IX, X, and XI travel through

A

jugular foramen

24
Q

Internal jugular vein begins here & receives direct drainage from the sigmoid & inferior petrosal sinuses

A

jugular foramen

25
Q

The body of the sphenoid bone contains the

A

sphenoid sinus

26
Q

The hypophyseal fossa is filled by the ___________ and covered by the ________

A

pituitary gland ; sellar diaphragm

27
Q

Posterior aspect of sella turcica

A

dorsum sellae

28
Q

Articulates with basilar portion of the occipital bone

A

Dorsum sellae

29
Q

Attachment of the cerebellar tentorium

A

Anterior & Posterior clinoid processes

30
Q

The foramen ovale is on what wing of the sphenoid

A

Greater

31
Q

What transmits the middle meningeal artery

A

Foramen spinosum

32
Q

Space between the greater & lesser wings of the sphenoid bone

A

superior orbital fissure

33
Q

The optic canal transmits what 2 things

A

CN II and the ophthalmic artery

34
Q

By birth, what opening is covered by cartilage and is not continuous into the middle cranial fossa

A

Foramen lacerum

35
Q

The cribriform plate contains numerous openings for the
passage of the fibers of CN

A

CN I

809 - Exam Block 2 (14 decks)

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