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BDS3 Anatomy > Anatomy W1 - Vault of the skull > Flashcards

Anatomy W1 - Vault of the skull Flashcards

1
Q

What bones can you see from norma frontalis?

A 
Frontal 
Nasal 
Maxilla 
Zygomatic bone 
Mandible
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2
Q

What bones can you see from norma verticalis?

A

Frontal
Parietal (x2)
Occipital

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3
Q

What bones can you see from norma Lateralis?

A 
Frontal 
Parietal 
Greater wing of the sphenoid 
Temporal 
Maxilla 
Mandible 
Zygomatic 
Occipital
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4
Q

What suture connects the frontal bone to the parietal bones?

A

Coronal suture

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5
Q

What suture runs down the middle of the cranium joining the two parietal bones?

A

The sagital suture

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6
Q

What suture unites the occipital bone with the parietal bones?

A

The lambdoid suture

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7
Q

What suture joins the two frontal bones in a young individual?

A

The metopic suture

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8
Q

What is the highest part of the skull called?

A

The bregma

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9
Q

What age is the metopic suture fused by?

A

3 years old

8% of the population still have a metopic suture > the age of 3.

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10
Q

What is the function of the parietal foramen? What runs through them?

A

Provides venous communication between the inside and the outside of the cranial cavity.

Emissary veins pass through

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11
Q

What are wormian/sutural bones?

A

They are islands of bones along a suture

commonly on the lambdoid suture

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12
Q

Where are Wormian bones commonly found?

A

The lambdoid suture

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13
Q

What is the most post posterior part of the skull called?

Where is it located?

A

The external occipital protuberance

The occipital bone

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14
Q

Where is the anterior fontanelle found?

A

Diamond shaped membrane located between the 2 frontal bones and the 2 parietal bones of a baby.

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15
Q

What are sutures?

A

Unossified fibrous joints

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16
Q

How are sutures formed?

Describe the mechanism

A

Formed by intramembranous ossification in the embryo

Primitive mesenchymal cells differentiate into osteoblasts and lay down bone WITHOUT cartilage precursor.

17
Q

Describe the functions(s) of sutures.

A

Allow growth of cranial bones

Allow ease of movement of the the skull through the birth canal

18
Q

What bone does the head of the mandible articulate with to form the Tempromandibular joint?

A

Mandibular fossa of the Temporal bone

19
Q

List the parts of the temporal bone. (6)

A

Squamous zygomatic

Petromastoid

Tympanic plate

Styloid process

Zygomatic process

Mastoid process

20
Q

At what age does the mastoid process (part of the temporal bone) appear?

A

2 y/o

21
Q

Describe the difference between the mastoid process (part of the temporal bone) in males compared to females.

A

Mastoid process is larger and more prominent in males

22
Q

What is the pteroin?

A

An H shapes suture which has very thin and fragile bone that joins the frontal, parietal, sphenoidal and temporal bones

23
Q

What is the clinical relevance of the pteroin?

A

The bone in this area is thin

The middle meningeal artery runs directly below this area

Trauma to this area could lead to rupture of this artery

Leads to an extra dural haemorrhage

24
Q

What is the function of diploic veins?

A

Drain bone marrow

25
Q

How many parts are there to the frontal bone? Name them.

A

Squamous part

Frontal plate

Orbital plate

26
Q

How many parts is there to the maxilla?

A

2 wings joined by a suture

27
Q

What structures does the maxilla contribute to? (4)

A

Anterior nasal aperture

The bridge of the nose

The mesial lower margin of the orbit

Bones of the cheek

28
Q

What is the zygomatic process/buttress composed of?

A

The zygomatic process of the temporal bone

The temporal process of the zygomatic bone

29
Q

What are the key landmarks of the normal frontalis?

A

The supra-orbital foramen/notch

The infra-orbital foramen

The mental foramen

The zygomaticofacial formaen

30
Q

What does the supra-orbital foramen/notch carry?

A

The supraorbital branch of the opthalmic div of the trigeminal nerve

31
Q

What does the infra-orbital foramen carry?

A

The infraorbital branch of the maxillary branch of the trigeminal nerve

32
Q

What does the mental foramen carry?

A

The mental branch of the inferior alveolar nerve of the mandibular branch of the trigeminal nerve

33
Q

What can the supra-orbital notch be used for clinically?

A

Can be used to assess conscious levels.

Apply pressure to this area and a conscious patient will respond.

BDS3 Anatomy (26 decks)

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