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Flashcards in CRANIAL CAVITY Deck (50):
0

The cranial cavity is divided into

Floor
Roof

1

Floor is divided into 3 depressions

Ant cranial fossa
Middle
Posterior

2

Anterior cranial fossa is formed by

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

3

Anterior boundary of the Ant cranial fossa

Frontal bone

4

Middle boundary of ant cranial fossa

Crest for attachment of falx cerebri

5

Post boundary of ant cranial fossa

Lesser wing of sphenoid bone

6

Median part of ant cranial fossa

Groove for the optic chiasma

7

Attached to the crista galli

Falx cerebri

8

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

Crista galli

9

Attached to the ant clinoid process

Tentorium cerebelli

10

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

Ant clinoid process

11

The upper surface of the cribriform plate supports the

Olfactory bulbs

12

Small perforations in the cribriform plate are for the

Olfactory nerves

13

Landmarks in ethmoid bone

Olfactory foramina
Crista galli
Cribriform plate

14

Landmarks in sphenoid (ant cf)

Lesser wing
Ant clinoid process

15

Landmarks in Frontal

Orbital plate

16

Butterfly shaped

Middle cranial fossa

17

Middle part of middle cf accomodates

Pituitary gland

18

Lateral parts of middle cf accomodating

Temporal lobes of the brain

19

Central part of the middle cf is formedby

Body of the Sphenoid bone

20

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

Sella turcica

21

3 parts of sella turcica

Tuberculum sellae
Hypophysial fossa
Dorsum sellae

22

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

Tuberculum sellae

23

A groove running bet the right and left optic canals

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