Lecture 4: Skull Flashcards

1
Q

What are the paired cranial bones?

A

Temporal

Parietal

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2
Q

What are the unpaired cranial bones?

A

Frontal

Occipital

Sphenoid

Ethmoid

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3
Q

What are the paired facial bones?

A

Zygomatic

Lacrimal

Nasal

Palatine

Maxillae

Inferior Nasal Conchae

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4
Q

What are the unpaired facial bones?

A

Vomer

Mandible

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5
Q

What is the clinical significance of the Pterion landmark on the skull?

A

Middle Meningeal A. lies just deep to it, can rupture if there is a blow to the side of the head

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6
Q

What is a metopic suture?

A

Incomplete fusion of the frontal bones in the saggital plane

-can cause clept lip or palate

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7
Q

Why would bone flaps be created during surgery?

A

Incorporating as much overlying tissue with the bone allows periosteium to heal the best

Can be skin, muscle, fascia, etc.

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8
Q

What 2 bones meet at the coronal suture?

A

Frontal bone and Parietal bone

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9
Q

What 2 bones meet at the saggital suture?

A

Both parietal bone

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10
Q

What 2 bones meet at the Lambdoid suture?

A

Occipital bone and Parietal bone

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11
Q

What 2 bones meet at the Squamosal suture?

A

Temporal bone and parietal bone

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12
Q

What articulates with each other when nodding your head yes?

A

Atlas and the Occipital Condyles

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13
Q

What structure is found in the sella turcica?

A

Pituitary Gland

Clinical Significance: Tumor of pituitary gland can damage optic nerve and cause blindness

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14
Q

What cranial bone contains the foramen rotundum, foramen ovale, and foramen spinosum?

A

Sphenoid Bone

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15
Q

What blood vessel is transmitted through the foramen spinosum?

A

Middle Meningeal A.

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16
Q

What cranial bone does the pterygoid canal run through?

A

Sphenoid B.

17
Q

What is the attachment for the Falx Cerebri in the Ethmoid bone?

A

Crista Galli

18
Q

What bone is the cribiform plate located in?

A

Ethmoid Bone

19
Q

What bone forms the superior portion of the Nasal Septum?

A

Perpendicular plate of Ethmoid bone

20
Q

What bone forms the inferior portion of the Nasal Septum?

A

Vomer Bone

21
Q

What part of the Vomer B. articulates with the Sphenoid B.?

A

Ala

22
Q

What bone is part of the orbit, nasal cavity, and hard palate?

A

Palatine Bone

23
Q

Cleft lip is a failure of what bones to fuse?

A

Palatine and Maxilla

24
Q

What structure in the maxilla separates the hard palate from the anterior nasal spine?

A

Incisive foramen

25
Q

What is the largest paranasal sinus in the skull?

A

Maxillary Sinus

26
Q

What does a Le Fort I fracture involve?

A

Fracture of the alveolar process of maxilla

27
Q

What does a Le Fort II fracture involve?

A

Fracture of maxilla partially through the orbit and at the zygomaxillary suture

28
Q

What does a Le Fort III fracture involve?

A

Fracture dislocating upper face from the cranium (through the orbit)

29
Q

What bones comprise the nasal complex?

A

Frontal B.

Ethmoid B.

Sphenoid B. (Superior and middle nasal conchae)

Horizontal plate of palatine B.

Maxilla

Inferior nasal concha B.

Lacrimal B.

Nasal B.

30
Q

What bones form the roof of the orbit?

A

Lesser wing of sphenoid B.

Frontal B.

31
Q

What bones form the lateral wall of the orbit?

A

Frontal B. (zygomatic process)

Sphenoid B. (Greater wing)

Zygomatic B. (Orbital surface)

32
Q

What bones form the medial wall of the orbit?

A

Maxilla (frontal process)

Lacrimal B.

Ethmoid B. (Lateral mass)

33
Q

What bones form the floor of the orbit?

A

Palatine B. (Perpendicular plate)

Maxilla (orbital surface)

Zygomatic B.

34
Q

What bones form the orbit?

A

Frontal B.

Sphenoid B.

Zygomatic B.

Maxilla

Palatine B.

Lacrimal B.

Ethmoid B.

35
Q

What are the paranasal sinuses?

A

Frontal

Sphenoid

Ethmoid

Maxillary

36
Q

What is the clinical significance of the Anterior Fontanelle of the fetal skull?

A

Largest fontanelle, can extract CSF