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Anatomy > Skull and TMJ > Flashcards

Skull and TMJ Flashcards

1
Q

What is a pneumatised bone?

A

A bone with air spaces in it e.g. frontal, temporal, sphenoid, ethmoid

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2
Q

What is the function of pneumatised bones?

A

Makes skull lighter

Adds resonance to voice

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3
Q

Name the paired bones in the neurocranium

A

Parietal

Temoral

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4
Q

Name the single bones in the neurocranium

A

Frontal
Occipital
Sphenoid
Ethmoid

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5
Q

Name the paired bones in the viscerocranium

A 
Palatine
Lacrimal
Nasal
Zygomatic 
Inferior Nasal Cocha
Maxilla
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6
Q

Name the single bones in the viscerocranium

A

Vomer

Mandible

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7
Q

What are the borders of the temporal fossa?

A

Sup. + Post. = sup. + inf. temporal lines
Ant. = Frontal process of zygomatic bone, zygomatic process of frontal bone
Inf. = Infratemporal crest deep to zygomatic arch

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8
Q

What is the ptersion?

A

H-shaped junction of sutures where the frontal, parietal, temporal and sphenoid bones meet

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9
Q

What is the clinical significance of the pterion?

A

Weak area in skull which is susceptible to injury

Anterior branch of middle meningeal artery lies beneath pterion meaning injury can cause an extradural haematoma

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10
Q

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

A

Lamboid suture

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11
Q

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

A

Coronal suture

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12
Q

What is the function of arachnoid granulations?

A

Return CSF draining from the skull back into the venous circulation

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13
Q

What is the glabella?

A

The most prominent aspect of the face

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14
Q

What is the nasion?

A

The most depressed aspect of the face

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15
Q

What is the inion?

A

A protuberance on the occipital bone

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16
Q

What is the asterion?

A

Junction between parietal, occipital and temporal bones

17
Q

What are the boundaries of the infratemporal fossa?

A

Lateral: ramus of the mandible
Medial: lateral pterygoid plate of the sphenoid
Anterior: posterior aspect of the maxilla
Posterior: tympanic plate, mastoid and styloid processes
Superior: infratemporal crest of sphenoid bone
Inferior: angle of mandible

18
Q

How would a fratured cribiform plate present?

A

CSF rhinorrhoea

19
Q

Where do the olfactory bulbs lie?

A

On the cribiform plate

20
Q

Where does the pituitary gland lie?

A

On the hypophyseal fossa

21
Q

Which bony structures make up the TMJ joint?

A

Glenoid fossa of temporal bone

Condylar process of mandible

22
Q

Which form of mandible dislocation is most common?

A

Anterior dislocation into infratemporal fossa

23
Q

During which movement is the mandible most susceptible to dislocation and why?

A

Depression - condylar processes move anteriorly and lie underneath the articular eminences

24
Q

Which structures pass through the superior orbital fissure?

A

Ophthalmic nerve (CN V1)
Opthalmic veins
CN III, IV, VI
SNS fibres

25
Q

Which nerve passes through the foramen rotundum?

A

CN V2 (maxillary)

26
Q

Which structures pass through the foramen ovale?

A 
CN V3 (mandibular)
Accessory meningeal artery
27
Q

Which structures pass through the foramen spinosum?

A

Middle meningeal artert

Meningeal branch of V3

28
Q

Which foramen does the Facial Nerve pass through?

A

Stylomastoid foramen

29
Q

Which structure passes through the foramen lacerum?

A

Deep petrosal nerve

30
Q

Which structures pass through the jugular foramen?

A

CN IX, X, XI
IJV
Inferior and sigmoid sinuses

31
Q

Which structure passes through the hypoglossal canal?

A

Hypoglossal nerve

32
Q

What is the function of the lateral ligament of the TMJ?

A

Strengths joint laterally

Alongside postglenoid tubercle prevents posterior dislocation

33
Q

Which structures pass through the optic canals?

A

Optic nerves

Ophthalmic arteries

Anatomy (14 decks)

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