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DMD2 > Bones of the skull > Flashcards

Bones of the skull Flashcards

1
Q

How is the metopic suture formed?

A

2 bones fuse to form frontal bone.

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2
Q

Which foramina of the skull run through the sphenoid?

A

Intraorbital foramen

Optic canal

Superior orbital fissure

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3
Q

Where does the supraorbital foramen run?

A

It passes through the frontal bone and allows passage of supraorbital NAV

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4
Q

Where does the infraorbital foramen run?

A

Sphenoid bone and maxilla and allows passage of infraorbital NAV

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5
Q

What passes through the optic canal?

A

Optic nerve and opthalmic artery

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6
Q

What passes through the superior orbital fissure?

A

CN3, 4, 6

Trigenminal branches: Lacrimal frontal nasociliary nerves

Opthalmic vein.

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7
Q

What passes through the superior orbital fissure?

A

CN3, 4, 6

Trigenminal branches: Lacrimal frontal nasociliary nerves

Opthalmic vein

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8
Q

What passes through the inferior orbital fissure?

A

Infraorbital nerve + infraorbital vessels + ascending branches of sphenopalatine ganglion

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9
Q

What passes through foramen rotundum?

A

V2 (maxillary nerve)

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10
Q

What passes through foramen ovale?

A

V3 (mandibular nerve)

Parasympathetic fibers from CN 9 via less petrosal nerve + accessory meningeal artery

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11
Q

What passes through the foramen spinosum?

A

Middle meningeal artery and vein

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12
Q

What passes through the petrotympanic fissure?

A

Chorda tympani + anterior tympanic artery

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13
Q

What passes through the foramen lacerum?

A

Greater and deep petrosal nerve + parasympathetic fibers from CN7 via nervus intermedius

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14
Q

What passes through the internal acoustic meatus?

A

CN7 and 8

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15
Q

What passes through the stylomastoid foramen?

A

CN7

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16
Q

What passes through the jugular foramen?

A

Internal jugular vein

CN 9, 10, 11

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17
Q

What passes through the mandibular formaen?

A

Inferior alveolar nerve (V3) + Artery + Vein

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18
Q

What passes through the mental foramen?

A

Mental NAV

19
Q

Which foramina pass through the palatine bone?

A

Greater and lesser palatine foramen

20
Q

Which foramina pass through the frontal bone?

A

Foramen caecum

Supraorbital foramen

21
Q

Which foramina pass through the maxilla?

A

Incisive canal

Infraorbital foramen

Inferior orbital fissure

22
Q

Which foramina pass through the sphenoid?

A

Infraorbital foramen

Optic canal

Superior orbital fissure

Inferior orbital fissure

Foramen rotundum

Foramen ovale

Foramen spinosum

Foramen lacerum

23
Q

Which foramina pass through the frontal bone?

A

Foramen caecum (also passes through the ethmoid)

Supraorbital foramen

24
Q

Which foramina pass through the mandible?

A

Mandibular foramen

Mental foramen

25
Q

Which foramina pass through the sphenoid?

A

Infraorbital foramen (also passes through the maxilla)

Optic canal

Superior orbital fissure

Inferior orbital fissure (also passes through the maxilla)

Foramen rotundum

Foramen ovale

Foramen spinosum

Foramen lacerum

26
Q

Which bones make up the orbit?

A

Zygomatic bone

Maxillary bone

Lacrimal bone

Ethmoid bone

Sphenoid bone

27
Q

What is the clinical significance of the anatomy of the ethmoid?

A

Infection passing through the ethmoid can cause infection in the brain and orbit.

28
Q

Which nerve runs through the pterygomaxillary fissure?

A

The maxillary nerve

29
Q

What is the pterygomaxillary fissure?

A

The pterygomaxillary fissure is a fissure of the human skull. It is vertical, and descends at right angles from the medial end of the inferior orbital fissure. It is a triangular interval, formed by the divergence of the maxilla from the pterygoid process of the sphenoid.

30
Q

How is the mandible connected to the rest of the skull?

A

Mandible is connected to rest of the skull only by soft tissue

31
Q

What is the mylohyoid ridge?

A

The mylohyoid ridge is the ridge for mylohyoid muscle to connect. It is located on the ramus of the mandible.

32
Q

What is teh external oblique ridge?

A

External oblique ridge is a landmark that ends towards the mandibular foramen. It is located on the buccal side of the mandible.

33
Q

Where on the mandible are the lingual foramen and digastric fossa?

A

Both are located on lingual side of the mandible anteriorly.

Lingual foramen with genial tubercle is located centrally

Digastric fossa is located on both sides of the lingual foramen

34
Q

Where on the mandible are the lingual foramen and digastric fossa?

A

Both are located on lingual side of the mandible anteriorly.

Lingual foramen with genial tubercle is located centrally.

Digastric fossa is located on both sides of the lingual foramen.

35
Q

What attaches to the mastoid process?

A

The sternocleidomastoid

36
Q

What is the purpose of the mandibular condyle?

A

Mandibular condyle fits into the glenoid fossa and this is palpable by feeling behind the ear when opening the mouth wide.

37
Q

What happens if the stylohyoid ligament is ossified?

A

Ossified stylohyoid ligament can cause fainting (Eagles syndrome) due to compression of the carotid sinus

38
Q

What is the stylohyoid ligament?

A

In connection with the stylohyoideus muscle a ligamentous band, the stylohyoid ligament, may be described. It is a fibrous cord, which is attached to the tip of the styloid process of the temporal bone and the lesser cornu (lesser horn) of the hyoid bone.

39
Q

What structures are present in the temporal bone related to hearing?

A

MISO: Malleus-Incus-Stapes-Oval window

40
Q

Where is the carotid artery/canal located relative to the occipital condyle?

A

Carotid artery/canal is lateral and anterior to the occipital condyle

41
Q

Where is the sphenomandibular ligament located?

A

It attaches the spine of the sphenoid to the lingula of the mandible

42
Q

What is attached by the stylomandibular ligament?

A

Styloid process to the angle of the mandible

43
Q

What is the shape and attachment of the occipital condyle?

A

Occipital condyle is bean shaped and attaches to the first vertebra

44
Q

What structures are located very close to the maxillary sinus?

A

The molars and the premolars

DMD2 (89 decks)

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