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GA 2 > CRANIAL CAVITY > Flashcards

CRANIAL CAVITY Flashcards

(50 cards)

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0
Q

Floor is divided into 3 depressions

A

Ant cranial fossa
Middle
Posterior

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1
Q

The cranial cavity is divided into

A

Floor

Roof

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2
Q

Anterior cranial fossa is formed by

A

Frontal bone
Crista galli and cribriform plate of ethmoid
Lesser wings of sphenoid bone

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3
Q

Anterior boundary of the Ant cranial fossa

A

Frontal bone

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4
Q

Middle boundary of ant cranial fossa

A

Crest for attachment of falx cerebri

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5
Q

Post boundary of ant cranial fossa

A

Lesser wing of sphenoid bone

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6
Q

Median part of ant cranial fossa

A

Groove for the optic chiasma

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7
Q

Attached to the crista galli

A

Falx cerebri

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8
Q

Sharp upward projection of the ethmoid bone where falx cerebri is attached

A

Crista galli

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9
Q

Attached to the ant clinoid process

A

Tentorium cerebelli

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10
Q

Formed by the medial end of the lesser wing of sphenoid bone

A

Ant clinoid process

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11
Q

The upper surface of the cribriform plate supports the

A

Olfactory bulbs

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12
Q

Small perforations in the cribriform plate are for the

A

Olfactory nerves

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13
Q

Landmarks in ethmoid bone

A

Olfactory foramina
Crista galli
Cribriform plate

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14
Q

Landmarks in sphenoid (ant cf)

A

Lesser wing

Ant clinoid process

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15
Q

Landmarks in Frontal

A

Orbital plate

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16
Q

Butterfly shaped

A

Middle cranial fossa

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17
Q

Middle part of middle cf accomodates

A

Pituitary gland

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18
Q

Lateral parts of middle cf accomodating

A

Temporal lobes of the brain

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19
Q

Central part of the middle cf is formedby

A

Body of the Sphenoid bone

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20
Q

Saddle shaped bony prominence which acts to hold and support the pituitary gland

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A

Sella turcica

21
Q

3 parts of sella turcica

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A

Tuberculum sellae
Hypophysial fossa
Dorsum sellae

22
Q

Vertical elevation, forms ant wall of sella turcica and post aspect of chiasmatic sulcus

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A

Tuberculum sellae

23
Q

A groove running bet the right and left optic canals

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A

Chiasmatic sulcus

24
Sits in the middle of sella turcica. It is a depression in the body of sphenoid, which holds pituitary gland
Hypophysial fossa
25
Forms post wall of sella turcica | Separates middle from posterior cranial fossa
Dorsum sellae
26
Arise from lesser wing of sphenoid
Ant clinoid process
27
Superolateral projections of dorsum sellae
Post clinoid process
28
Attachment points for TENTORIUM CEREBELLI
Ant and *post clinoid process
29
Lateral parts of middle cranial fossa are formed by
Greater wing of sphenoid | Squamous and petrous part of temporal
30
Optic canals in the sphenoid bone transmits
Optic nerves CN II | Opthalmic arteries
31
The optic canal are connected by
Chiasmatic sulcus
32
Four foramina in the sphenoid bone -middle cranial fossa
Superior orbital fissure Foramen rotundum Foramen ovale Foramen spinosum
33
Superior orbital fissure opens anteriorly to the orbit and transmits
3. Oculomotor nerve 4. Trochlear 5. Opthalmic branch of trigeminal nerve 6. Abducens nerve
34
Opens into the pterygopalatine fossa and transmits maxillary branch of trigeminal nerve
Foramen rotundum
35
Opens into the infratemporal fossa | Transmits mandibular branch of trigeminal
Foramen ovale
36
Transmits middle meningeal artery and vein and meningeal branch of trigeminal
Foramen spinosum
37
3 foramina in the temporal bone
Hiatus of greater petrosal nerve Hiatus of lesser petrosal nerve Carotid canal
38
Formed by sphenoid, temporal and occipital bone
Foramen lacerum
39
Part of intracranial cavity | Located bet foramen magnum and tentorium cerebelli
Post cranial fossa
40
Post cranial fossa contains
Brainstem and cerebellum Midbrain, pons, medulla,
41
Largest and deepest of the three fossas
Posterior cf
42
Anterior boundary of posterior cranial fossa
Dorsum sellae Posterior aspects of body of sphenoid Basilar part of occipital bone
43
Posterior boundary of posterior cranial fossa
SQUAMOUS PART OF OCC BONE
44
Lateral boundary of posterior cranial fossa
Petrous and mastoid part of temporal bone
45
Superior boundary of posterior cranial fossa
Mastoid angles of parietal
46
Transmits the medulla, vertebral arteries
Foramen magnum
47
Internal acoustic meatus transmits
Facial | Vestibulocochlear
48
Jugular foramen transmits
Int jugular vein Glossopharyngeal Vagus Accessory nerves
49
Lies at the anterolateral margins of f magnum and transmits hypoglossal nerve
Hypoglossal canal

GA 2 (21 decks)

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