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GA 2 > CRANIAL CAVITY > Flashcards

CRANIAL CAVITY Flashcards

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

A

Sella turcica

21
Q

3 parts of sella turcica

A

Tuberculum sellae
Hypophysial fossa
Dorsum sellae

22
Q

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

A

Tuberculum sellae

23
Q

A groove running bet the right and left optic canals

A

Chiasmatic sulcus

24
Q

Sits in the middle of sella turcica. It is a depression in the body of sphenoid, which holds pituitary gland

A

Hypophysial fossa

25
Q

Forms post wall of sella turcica

Separates middle from posterior cranial fossa

A

Dorsum sellae

26
Q

Arise from lesser wing of sphenoid

A

Ant clinoid process

27
Q

Superolateral projections of dorsum sellae

A

Post clinoid process

28
Q

Attachment points for TENTORIUM CEREBELLI

A

Ant and *post clinoid process

29
Q

Lateral parts of middle cranial fossa are formed by

A

Greater wing of sphenoid

Squamous and petrous part of temporal

30
Q

Optic canals in the sphenoid bone transmits

A

Optic nerves CN II

Opthalmic arteries

31
Q

The optic canal are connected by

A

Chiasmatic sulcus

32
Q

Four foramina in the sphenoid bone -middle cranial fossa

A

Superior orbital fissure
Foramen rotundum
Foramen ovale
Foramen spinosum

33
Q

Superior orbital fissure opens anteriorly to the orbit and transmits

A
  1. Oculomotor nerve
  2. Trochlear
  3. Opthalmic branch of trigeminal nerve
  4. Abducens nerve
34
Q

Opens into the pterygopalatine fossa and transmits maxillary branch of trigeminal nerve

A

Foramen rotundum

35
Q

Opens into the infratemporal fossa

Transmits mandibular branch of trigeminal

A

Foramen ovale

36
Q

Transmits middle meningeal artery and vein and meningeal branch of trigeminal

A

Foramen spinosum

37
Q

3 foramina in the temporal bone

A

Hiatus of greater petrosal nerve
Hiatus of lesser petrosal nerve
Carotid canal

38
Q

Formed by sphenoid, temporal and occipital bone

A

Foramen lacerum

39
Q

Part of intracranial cavity

Located bet foramen magnum and tentorium cerebelli

A

Post cranial fossa

40
Q

Post cranial fossa contains

A

Brainstem and cerebellum

Midbrain, pons, medulla,

41
Q

Largest and deepest of the three fossas

A

Posterior cf

42
Q

Anterior boundary of posterior cranial fossa

A

Dorsum sellae
Posterior aspects of body of sphenoid
Basilar part of occipital bone

43
Q

Posterior boundary of posterior cranial fossa

A

SQUAMOUS PART OF OCC BONE

44
Q

Lateral boundary of posterior cranial fossa

A

Petrous and mastoid part of temporal bone

45
Q

Superior boundary of posterior cranial fossa

A

Mastoid angles of parietal

46
Q

Transmits the medulla, vertebral arteries

A

Foramen magnum

47
Q

Internal acoustic meatus transmits

A

Facial

Vestibulocochlear

48
Q

Jugular foramen transmits

A

Int jugular vein
Glossopharyngeal
Vagus
Accessory nerves

49
Q

Lies at the anterolateral margins of f magnum and transmits hypoglossal nerve

A

Hypoglossal canal

GA 2 (21 decks)

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