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Neuroanatomy - ANAT202 > The skull > Flashcards

The skull Flashcards

1
Q

How many bones does the skull contain?

A

The skull has 22 bones, excluding the ossicles of ear , except for th

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2
Q

How is the mandible joined to the skull?

A

The mandible is joined to the skull by a moveable joint

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3
Q

Describe most of the skull bones and what are the skull bones joined by?

A

Most skull
bones are flat bones joined by
interlocking joints called sutures

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4
Q

What is the skull divided into?

A

The skull is divided into the braincase (neurocranium) and the facial skeleton (viscerocranium).

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5
Q

What is the main task of the skull?

A

The main task of the skull is the protection of the most important organ in the human body: the brain.

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6
Q

Name the 8 cranial bones of the skull.

A
  • Occipital
  • 2 Temporal bones
  • 2 Parietal bones
  • Sphenoid
  • Ethmoid
  • Frontal
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7
Q

Name the 14 facial bones.

A
  • 2 Nasal
  • 2 Maxillae
  • 2 Zygomatic
  • Mandible
  • 2 Lacrimal
  • 2 Palatine
  • 2 Inferior nasal conchae
  • Vomer
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8
Q

List the functions of the skull.

A 
The skull : 
• Forms the framework of the face
• Contains cavities for special sense organs
• Provides openings for air & 
food passage
• Secures the teeth
• Anchors muscles eg. 
muscles of facial 
expression & mastication
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9
Q

What is the cranium divided into?

A

The cranium is divided into :
An upper domed part (calvaria) that covers the cranial cavity containing the brain
• A Base that consists of floor of cranial cavity
• The Lower anterior part- facial skeleton (viscerocranium)

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10
Q

Name the bones that make up the calvaria.

A

CALVARIA
Temporal & parietal bones
Frontal, sphenoid, & occipital bones

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11
Q

Name the bones that make up the cranium.

A

CRANIUM

Sphenoid, temporal, & occipital bones

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12
Q

Name the bones that make up the facial skeleton.

A 
FACIAL SKELETON 
Nasal bones
Palatine bones
Lacrimal bones
Zygomatic bones
Maxillae
Inferior nasal conchae
Vomer
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13
Q

Describe the roof of the calvaria.

A

The calvaria roof is a dome-shaped roof

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14
Q

What is the function of the roof of the calvaria?

A

The calvaria roof protects the superior aspect of brain

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15
Q

What does the roof of the calvaria consist of?

A

The calvaria roof Consists mainly of the frontal, paired parietal, & occipital bones

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16
Q

Calvaria - What is the frontal crest?

A

The frontal crest is the point of attachment for the falx cerebri

17
Q

What is the purpose of the depressions and pits(granular foveolae)?

A

The depressions and pits mark the location of the arachnoid granulations

18
Q

What creates the smaller grooves?

A

The smaller grooves are created by various meningeal vessels

19
Q

Where are the 4 largest sutures of skull located?

A

The four largest sutures of the skull are located where the parietal bones articulate with other bones:
coronal, sagittal, lambdoid sutures

20
Q

Which bones make up the calvaria/skull cap?

A

Frontal bone, parietal bones, & occipital bone

21
Q

What does the unpaired frontal articulate with?

A

The unpaired frontal bone
articulates with paired parietal bones at coronal
suture

22
Q

What do the 2 parietal bones articulate with?

A

The two parietal bones
articulate with each other
in midline at sagittal suture

23
Q

Which unpaired bone do parietal bones articulate with?

A

The Parietal bones articulate
with the unpaired occipital
bone at the lambdoid suture

24
Q

What is the junction of the sagittal and coronal sutures called?

A

Junction of sagittal & coronal sutures is bregma

25
Q

What is the junction of the sagittal and lambdoid sutures called?

A

Junction of sagittal & lambdoid sutures is lambda

26
Q

What does the frontal bone form?

A

The frontal bone forms the forehead, roof of
orbit, most of anterior
part of cranial floor

27
Q

What happens to the right and left frontal bones after birth?

A

After birth the right & left frontal bones unite at the

metopic suture

28
Q

What takes place superior to the orbit?

A

Superior to orbit, bone
thickens – forms supra-orbital margin- contains
foramen

29
Q

Incomplete foramen =

A

supraorbital notch

30
Q

Where do the frontal sinuses lie?

A

Frontal sinuses lie deep

to frontal squama

31
Q

Which bones form the sides and the roof of the cranial cavity?

A

Two parietal bones form sides & roof of cranial cavity

32
Q

CRANIAL BONES … PARIETAL BONE. What does the internal surface contain?

A

The internal surface contains many protrusions & depressions that accommodate blood
vessels supplying dura mater

33
Q

What do the temporal bones form?

A

The temporal bones form the inferior lateral aspect of cranium + part of cranial floor

34
Q

What forms the zygomatic arch?

A

The zygomatic process of temporal and the temporal process of zygomatic bone

Neuroanatomy - ANAT202 (5 decks)

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