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SHB > 10.13.16 Skull > Flashcards

10.13.16 Skull Flashcards

1
Q

The skull is formed from separate bones. There are ___ single bones and ___ paired bones.

A

6; 8

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2
Q

Many of the bones of the skull articulate with one another at serrated edges called ___.

A

Sutures

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3
Q

The skull is subdivided into what two main parts?

A

Cranium, mandible

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4
Q

The skull is studied in different views, also known as ___.

A

Norma

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5
Q

At birth, there are soft spots on the skull known as ___.

A

Fontanelles

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6
Q

Fontanelles close ___ months after birth.

A

18-24

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7
Q

What is the name of the superior view of the skull?

A

Norma verticalis (skull cap)

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8
Q

What bones can be seen in norma verticalis?

A

Frontal bone, parietal bones, occipital bone

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9
Q

What is the name of the suture between the parietal bones and the frontal bone?

A

Coronal suture

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10
Q

What is the name of the suture between the two parietal bones?

A

Sagittal suture

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11
Q

What is the area of the skull where the sagittal and coronal sutures join?

A

Bregma

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12
Q

What is the name of the suture between the occipital bone and the parietal bones?

A

Lambdoid suture

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13
Q

What is the area of the skull where the sagittal and lambdoid sutures join?

A

Lambda

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14
Q

What is the name of the superior/posterior view of the skull?

A

Norma occipitalis

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15
Q

What is the main bony feature of the norma occipitalis?

A

External occipital protuberance with superior and inferior nuchal lines

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16
Q

What is the name of the superior/anterior view of the skull?

A

Norma frontalis

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17
Q

What are the main bony features of norma frontalis?

A
  1. Frontal bone
  2. Nasal bone
  3. Bony orbit
  4. Zygomatic bone
  5. Maxillary bone
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18
Q

What are three foramina seen in norma frontalis?

A
  1. Supraorbital foramen
  2. Infraorbital foramen
  3. Mental foramen
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19
Q

Where is the supraorbital foramen found?

A

Above the orbit

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20
Q

What does the supraorbital foramen transmit?

A

Supraorbital nerve (derived from frontal nerve, which belongs to the ophthalmic division of V) and supraorbital artery (derived from ophthalmic artery)

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21
Q

Where is the infraorbital foramen found?

A

Below the orbit

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22
Q

What does the infraorbital foramen transmit?

A

Infraorbital nerve (branch of maxillary division of V) and infraorbital artery (branch of maxillary artery)

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23
Q

Where is the mental foramen found?

A

On the mandible

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24
Q

What does the mental foramen transmit?

A

Mental nerve (branch of mandibular division of V) and mental artery (branch of maxillary artery)

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25
Q

What bone forms the roof of the nose?

A

Ethmoid bone

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26
Q

Which concha (shelf) are part of the ethmoid bone?

A

Superior concha and middle concha

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27
Q

What part of the ethmoid bone contains many holes?

A

Cribriform plate

28
Q

What does the cribriform plate transmit?

A

CN I

29
Q

What are the foramen and fissures in the orbit?

A

Foramen: Optic canal
Fissure: Superior and inferior orbital fissures

30
Q

What is the name of the lateral view of the skull?

A

Norma lateralis

31
Q

The zygoma and temporal bones articulate to form the ___.

A

Zygomatic arch

32
Q

The ___ is located above the zygomatic arch.

A

Temporal fossa

33
Q

What is the pterion?

A

Meeting of temporal, parietal, frontal, and greater wing of sphenoid bones

34
Q

The pterion is a landmark for the ___.

A

Middle meningeal artery

35
Q

Breaking the zygomatic arch allows one to see the ___.

A

Infratemporal fossa

36
Q

The ___ has two wings - greater and lesser.

A

Sphenoid bone

37
Q

What are the three cranial fossa in the cranial cavity?

A
  1. Anterior cranial fossa
  2. Middle cranial fossa
  3. Posterior cranial fossa
38
Q

What forms the anterior cranial fossa?

A

Orbital plate of frontal bone, lesser wing of sphenoid, cribriform plate of ethmoid bone, crista galli, frontal crest, foramen cecum

39
Q

What forms the middle cranial fossa?

A

Greater wing of sphenoid, temporal bone

40
Q

What is the pyramid-shaped portion of the temporal bone at the base of the skull between the sphenoid and occipital bones?

A

Petrous

41
Q

What does petrous protect?

A

VII and VIII

42
Q

What forms the posterior cranial fossa?

A

Temporal and occipital bones

43
Q

What are the processes of the lesser wing of the sphenoid bone?

A

Anterior clinoid processes

44
Q

What is found between the optic nerve canals?

A

Groove for optic chiasm

45
Q

What is found medial to the anterior clinoid processes?

A

Optic canals

46
Q

What is found between the crista galli and frontal crest?

A

Foramen cecum

47
Q

What does the optic canal transmit?

A

Optic nerve and ophthalmic artery

48
Q

What is found in the middle of the body of the sphenoid bone?

A

Pituitary gland

49
Q

The pituitary gland is located in the ___ fossa.

A

Hypophyseal

50
Q

What forms the bony seat for the pituitary gland?

A

Sella turcica

51
Q

CN III, IV, V1, and V2 cross the ___ to reach their foramens.

A

Cavernous sinus

52
Q

What artery passes through the cavernous sinus?

A

Internal carotid artery

53
Q

What are the 4 foramen of the middle cranial fossa?

A
  1. Foramen rotundum
  2. Foramen ovale
  3. Foramen spinosum
  4. Foramen lacerum
54
Q

What does the foramen rotundum transmit?

A

Maxillary nerve (V2)

55
Q

What does the foramen ovale transmit?

A

Mandibular nerve (V3) and lesser petrosal nerve

56
Q

What does the foramen spinosum transmit?

A

Middle meningeal artery

57
Q

What bone contains foramen rotundum, spinosum, and ovale?

A

Sphenoid bone

58
Q

What are the two limbs of the sphenoid bone?

A

Pterygoid process (medial and lateral)

59
Q

What is found above the foramen rotundum, ovale, and spinosum?

A

Superior orbital fissure

60
Q

Where is the internal auditory meatus found?

A

Petrous part of temporal bone

61
Q

What does the internal auditory meatus transmit?

A

CN VII and VIII

62
Q

The petrous part of the temporal bone protects the ___.

A

Ear

63
Q

What nerves exit the trigeminal ganglia?

A

CN V1, V2, V3

64
Q

What does the jugular foramen transmit?

A

CN IX, X, XI

65
Q

What does the hypoglossal canal transmit?

A

CN XII

66
Q

What does foramen magnum transmit?

A

CN XI

SHB (36 decks)

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