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~RADT 133 - Positioning 3 > Skull Anatomy > Flashcards

Skull Anatomy Flashcards

1
Q

The skull has how many bones?

A

22; 8 cranial and 14 facial

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2
Q

What cranial bones are paired?

A

Parietal and temporal

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3
Q

The sphenoid and ethmoid are classified as ____ bones

A

Cranial (floor)

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4
Q

What is the name of the articulation between the frontal and parietal bone?

A

The coronal suture

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5
Q

What is the name of the articulation between the parietal bone and the temporal bone?

A

Squamosal suture

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6
Q

The foramen magnum is located in which bone?

A

Occipital

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7
Q

The flattened, horizontal portion on the superior aspect of the ethmoid bone is called the:

A

Cribriform plate

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8
Q

The hard, dense bony process of the temporal bone that houses the structures of the middle and inner ear is called the:

A

Petrous pyramid

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9
Q

The mastoid air cells are located in the:

A

temporal bone

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10
Q

The rounded, articulating condyles of the mandible that help form the temporomandibular joint are called the:

A

condyloid processes

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11
Q

The superior and middle nasal conchae that serve to increase the surface area of the nasal cavities are found in the:

A

Ethmoid bone

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12
Q

Which three cranial bones articulate directly with the zygomatic bone?

A

Frontal, sphenoid, temporal

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13
Q

The only movable bone in the adult skull is the:

A

Mandible

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14
Q

Average skull, width is 75-80% of length. Angle from midsagittal plane to petrous pyramid is 47 degrees

A

Mesocephalic

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15
Q

Broad skull side to side; 80% or greater than the length

A

Brachycephalic

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16
Q

Long, narrow skull; less than 75% of the length

A

dolichocephalic

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17
Q

There are a total of _____ fontanels in an infant.

A

6

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18
Q

Which cranial bone contains the cribriform plate?

A

ethmoid

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19
Q

What is the difference, in degrees, between the infraorbitomeatal and orbitomeatal line?

A

7-8 degrees

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20
Q

A patient enters the emergency department with a possible basilar skull fracture. Which of the following skull projections would best demonstrate any blood present in the sphenoid sinus?

A

horizontal beam lateral

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21
Q

Which cranial bone possesses the zygomatic process?

A

temporal

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22
Q

What are the two most common positioning errors when it comes to headwork.

A

rotation and tilt

23
Q

Bones of the calvarium (skullcap)

A

Frontal, right/left parietal, occipital

24
Q

Bones of the skull floor

A

right/left temporal, sphenoid, ethmoid

25
Q

Two main parts of the frontal bone

A

squamous/vertical portion (forehead); orbital/horizontal portion (superior part of orbit)

26
Q

Slight depression above each eyebrow; corresponds to the floor of the anterior fossa of the cranial vault

A

Supraoribital groove (SOG)

27
Q

Superior rim of each orbit

A

Supraorbital margin

28
Q

Small hole/opening within the SOM slightly medial to it’s midpoint

A

Supraoribital notch

29
Q

Four cranial bones that articulate with the frontal bone:

A

right/left parietals, sphenoid, ethmoid

30
Q

The widest portion of the skull is located between the ________ of the two parietal bones

A

parietal tubercles (eminences)

31
Q

five cranial bones that articulate with the parietal bones:

A

frontal, occipital, sphenoid, temporal, opposite parietal

32
Q

Rounded external surface of the occipital bone:

A

Squamous portion

33
Q

the prominent bump or protuberance at the inferoposterior portion of the skull:

A

external occipital protuberance (inion)

34
Q

6 bones that articulate with the occipital bone:

A

two parietals, two temporals, sphenoid, atlas (first cervical vertebra)

35
Q

Arch of bone extending anteriorly from the squamous portion of the temporal bone

A

zygomatic process

36
Q

Houses the organs of hearing and equilibrium, including mastoid air cells

A

petrous pyramid

37
Q

Cranial articulations of each temporal bone:

A

Parietal, occipital, sphenoid

38
Q

Central depression on the body of the sphenoid bone

A

sella turcica

39
Q

The sella turcica houses which gland?

A

Pituitary gland

40
Q

contains many small openings or foramina through which segmental branches of the olfactory nerves (or the nerves of smell) pass.

A

Cribriform plate

41
Q

Cranial articulations of the ethmoid bone

A

Frontal and sphenoid

42
Q

Classification of cranial sutures

A

fibrous/synarthrodial

43
Q

Separates the two parietal bones at the midline

A

Sagittal suture

44
Q

Separates the two parietal bones from the occipital bone

A

Lambdoidal suture

45
Q

What landmark corresponds with the level of the petrous ridge?

A

TEA

46
Q

What is the largest immovable bone of the face?

A

Maxilla

47
Q

A skull with a 47 degree angle between the petrous pyramids and the midsagittal plane is classified as:

A

Mesocephalic

48
Q

positioning line that extends across the front (anterior face) through both eyes

A

IPL

49
Q

Positioning line extending from the EAM to the smooth elevation between the superciliary arches

A

GML

50
Q

Comprises most of the lateral wall of the orbital cavities.

A

Zygomatic bone

51
Q

Forms the posterior 1/4 of the roof of the mouth

A

Palatine bone

52
Q

Vertical portion of the mandible

A

Ramus

53
Q

Horseshoe portion of the mandible

A

Body

~RADT 133 - Positioning 3 (7 decks)

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