The Skull Flashcards

1
Q

What is the red part of the skull called?

A

Neurocranium

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2
Q

What is the blue part of the skull called?

A

Viscerocranium or facia bones

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3
Q

What is the viscerocranium also known as?

A

Facial bones

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4
Q

What is the neurocranium?

A

The bony case of the brain

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5
Q

What is the viscerocranium?

A

The facial bones

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6
Q

What is the skull made up of?
(2)

A

Neurocranium and viscerocranium

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7
Q

Label the skull:

A
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8
Q

What are the features of the frontal bone?
(2)

A

It’s unpaired in adults

It’s a flat bone

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9
Q

What does the frontal bone articulate with?
(2)

A

The parietal bones at the coronal suture

The zygomatic bone to form the frontozygomatic suture

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10
Q

Which bone in the skull is this?

A

Frontal bone

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11
Q

What are the features of the parietal bones?
(3)

A

They’re right and left parietal bones

They’re flat bones

They have superior and inferior temporal lines

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12
Q

Which bones in the skull is this?

A

Parietal bones

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13
Q

What do the parietal bones articulate with?
(4)

A

The sagittal border of the opposite parietal bone to form the sagittal suture

The frontal bone to form part of the coronal suture

The occipital bone to form part of the lambdoid suture

Sphenoid and temporal bones to form the squamosal suture

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14
Q

What are the features of the temporal bones?
(2)

A

They’re right and left temporal bones

They’re irregular bones (oddly shaped)

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15
Q

What do the temporal bones articulate with?
(4)

A

The mandibular fossa with the head of the mandible to form the temporomandibular joint

The squamous part with the parietal bones to form the squamosal suture

The occipital bones to form part of the lambdoid suture

The zygomatic bone

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16
Q

Which bones in the skull is this?

A

Temporal bones

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17
Q

What are are all the temporal bones?
(6)

A

Zygomatic process

Articular tubercle

External acoustic opening

Styloid process

Mastoid process

Mandibular fossa

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18
Q

What does the zygomatic process do?

A

The zygomatic bone

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19
Q

What does the external acoustic opening do?

A

It allows sound waves to reach the tympanic membrane

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20
Q

What does the styloid process do?

A

It allows for the attachment for muscles and ligaments of the tongue and neck

21
Q

What does the mastoid process do?

A

It allows for the attachment for sternocleidomastoid muscle, and contains mastoid air cells

22
Q

What does the mandibular fossa do?

A

It articulates with the condyle of mandible (TMJ)

23
Q

Label the temporal bones:

24
Q

How many pairs of auditory ossicles are there in the skull?

25
What are the 3 pairs of auditory ossicles called?
Malleus (attaches to tympanic membrane) Incus (middle) Stapes (internal)
26
What are the features of the occipital bone? (4)
It’s a flat bone They’re irregular bones (oddly shaped) It has occipital condyles It has an external occipital protuberance
27
What does the external occipital protuberance do?
It’s the attachment site for the trapezius muscle
28
What do the occipital condyles do?
They articulate with C1 (atlas)
29
Which bone in the skull is this?
Occipital bone
30
What are the foramens also known as?
Canals
31
Label the foramens/canals in the skull:
32
Label the foramens/canals in the skull:
33
What part of the skull is this?
Foramens/canals
34
Label the sphenoid bone:
35
What are the features of the ethmoid bone? (2)
It’s an irregular bone It plays an important role in the structure of the nasal cavity
36
What are the bones in the skull? (6)
Frontal bone Parietal bones Temporal bone Occipital bone Sphenoid bones Ethmoid bones
37
What are sutures?
Immoveable, fibrous joints
38
What are the 3 types of sutures?
Coronal suture Sagittal suture Lambdoidal suture
39
Label the sutures:
40
Label the sutures:
41
What is the fontanelle?
They’re soft spots between the bones of the skull where bone formation isn’t complete
42
When does the anterior fontanelle and the posterior fontanelle close?
The posterior fontanelle usually closes first, within 2 months of birth. The anterior fontanelle closes between 7-18 months and
43
What structure is found in a newborn skull?
The fontanelle
44
Label a newborn skull:
45
What are paranasal sinuses?
Air filled spaces
46
What are the 4 paranasal sinuses?
Frontal Ethmoid Sphenoid Maxillary
47
Label the paranasal sinuses:
48
What are the functions of the paranasal sinuses? (4)
Lightening the weight of the head Supporting immune defence of the nasal cavity Humidifying inspired air Increasing resonance of the voice