Skull Anatomy and topography - CH 11
TRUE or FALSE Frontanelles are only found in the skulls of infants.
True ("soft spot"; areas of incomplete ossification)
Which structure is labeled "A"? a. GAL b. GML c. OML d. IOML
a. GAL ( glabelloalveolar line )
Which radiographic landmark extends from the outer canthus to the EAM? a. OML b. IOML c. GML d. IPL e. AML f. MML
a. OML ( orbitomeatal line )
Which structure is labeled "M"? a. TEA b. mental point c. gonion d. EAM e. auricle
a. TEA ( top of ear attachment )
Which area of the cranial floor extends from the anterior frontal bone to lesser wings of sphenoid? a. anterior cranial fossa b. internal cranial fossa c. middle cranial fossa d. posterior cranial fossa
a. anterior cranial fossa
The junction of coronal and sagittal sutures is the: a. bregma b. lambda c. lambdoidal suture d. squamosal suture
a. bregma
Which suture is located between the frontal and parietal bones? a. coronal b. sagittal c. squamosal d. lambdoidal
a. coronal
Identify the highlighted structure. a. frontal bone b. parietal bone c. temporal bone d. occipital bone e. sphenoid bone
a. frontal bone
** Identify the bones that make up the calvaria (skull cap). (select all that apply) a. frontal b. parietal c. temporal d. sphenoid e. ethmoid f. occipital
a. frontal; b. parietal; f. occipital
Identify the highlighted structure. a. glabella b. pterion c. inion d. asterion e. mastoid process f. styloid process
a. glabella
Which structure is labeled "A"? a. glabella b. IPL c. supraorbital groove d. superciliary ridge
a. glabella
Which skull type is considered average in size and shape? a. mesocephalic b. brachycephalic c. dolichocephalic
a. mesocephalic
Which type of skull's petrous pyramids project 47 degrees from the MSP? a. mesocephalic b. brachycephalic c. dolichocephalic
a. mesocephalic
Which structure is labeled "C"? a. nasion b. acanthion c. mental point d. gonion e. auricle
a. nasion
Identify the highlighted structure. a. squamosal suture b. bregma c. coronal suture d. lambda e. lambdoidal suture
a. squamosal suture
**Which cranial bones are paired? a. temporal b. sphenoid c. occipital d. ethmoid
a. temporal
**Which of the following bones are part of the cranial floor? (1) Ethmoid (2) Frontal (3) Temporal A. 1 and 2 only B. 1 and 3 only C. 2 and 3 only D. 1, 2, and 3
b. 1 and 3 only
The skull reaches it's adult size and density at approximately what age? a. 5 b. 12 c. 18 d. 24
b. 12
Which structure is labeled "B"? a. GAL b. GML c. OML d. IOML
b. GML ( glabellomeatal line )
Which radiographic landmark extends from the infraorbital margin to the EAM? a. OML b. IOML c. GML d. IPL e. AML f. MML
b. IOML ( infraorbitomeatal line )
Which structure is labeled "G"? a. glabella b. IPL c. supraorbital groove d. supercillary ridge
b. IPL ( interpupillary line )
Which structure is labeled "F"? a. nasion b. acanthion c. EAM d. gonion e. auricle
b. acanthion
Which type of skull is short from front to back, broad from side to side, and shallow from base to vertex? a. mesocephalic b. brachycephalic c. dolichocephalic
b. brachycephalic
Which type of skull's petrous pyramids project 54 degrees from the MSP? a. mesocephalic b. brachycephalic c. dolichocephalic
b. brachycephalic
Which structure is labeled "C"? a. squamosal suture b. bregma c. coronal suture d. lambda e. lambdoidal suture
b. bregma
Identify the highlighted structure. a. frontal bone b. parietal bone c. temporal bone d. occipital bone e. sphenoid bone
b. parietal bone
Identify the highlighted structure. a. glabella b. pterion c. inion d. asterion e. mastoid process f. styloid process
b. pterion
Which suture is located on top of the head between the 2 parietal bones? a. coronal b. sagittal c. squamosal d. lambdoidal
b. sagittal
How many cranial bones are there? a. 4 b. 7 c. 8 d. 10 e. 14
c. 8
Identify the highlighted structure. a. pterion b. bregma c. EAM d. inion e. asterion
c. EAM
Which radiographic landmark extends from the glabella to the EAM? a. OML b. IOML c. GML d. IPL e. AML f. MML
c. GML ( glabellomeatal line )
Which structure is labeled "D"? a. GAL b. GML c. OML d. IOML e. AML
c. OML ( orbitomeatal line )
Identify the highlighted structure. a. squamosal suture b. bregma c. coronal suture d. lambda e. lambdoidal suture
c. coronal suture
Which type of skull is long from front to back, narrow from side to side, and deep from base to vertex? a. mesocephalic b. brachycephalic c. dolichocephalic
c. dolichocephalic
Which type of skull's petrous pyramids project 40 degrees from the MSP? a. mesocephalic b. brachycephalic c. dolichocephalic
c. dolichocephalic
**Which cranial bone makes up an aspect of the bony nasal septum? A. Sphenoid B. Temporal C. Ethmoid D. Frontal
c. ethmoid
Which structure is labeled # 31? a. glabella b. pterion c. inion d. asterion e. mastoid process f. styloid process
c. inion
Which structure is labeled "I"? a. nasion b. acanthion c. mental point d. gonion e. auricle
c. mental point
Which area of the cranial floor extends from the lesser wings of sphenoid to apices of petrous ridges? a. anterior cranial fossa b. internal cranial fossa c. middle cranial fossa d. posterior cranial fossa
c. middle cranial fossa
**Which cranial bone forms the posterior portion of the skull? a. temporals b. frontal c. occipital d. parietals
c. occipital
**The sella turcica is part of the: a. ethmoid bone b. temporal bone c. sphenoid bone d. occipital bone
c. sphenoid bone
Which suture is located between the temporal bone and parietal bones? a. coronal b. sagittal c. squamosal d. lambdoidal
c. squamosal
Which structure is labeled "E"? a. glabella b. IPL c. supraorbital groove d. superciliary ridge
c. supracilliary groove ( SOG )
**Which cranial bone houses the organs for hearing and equilibrium? A. Ethmoid B. Sphenoid C. Temporal D. Occipital
c. temporal
Identify the highlighted structure. a. frontal bone b. parietal bone c. temporal bone d. occipital bone e. sphenoid bone
c. temporal bone
Which structure is labeled "G"? a. GAL b. GML c. EAM d. AML e. MML
d. AML ( acanthiomeatal line )
Which structure is labeled "E"? a. GAL b. GML c. OML d. IOML e. AML
d. IOML ( infraorbitomeatal line )
Which radiographic landmark is a perpendicular line between the pupils of the eyes? a. OML b. IOML c. GML d. IPL e. AML f. MML
d. IPL ( interpupillary line )
Which structure is labeled "I"? a. glabella b. pterion c. inion d. asterion e. mastoid process f. styloid process
d. asterion
What portion of the skull is also referred to as the "skullcap"? a. frontal b. occipital c. bregma d. calvaria e. cranium
d. calvaria
Identify the highlighted structure. a. frontal bone b. parietal bone c. temporal bone d. ethmoid bone e. sphenoid bone
d. ethmoid bone
Which structure is labeled "J"? a. TEA b. acanthion c. EAM d. gonion e. auricle
d. gonion ( mandibular angle )
Identify the highlighted structure. a. squamosal suture b. bregma c. coronal suture d. lambda e. lambdoidal suture
d. lambda
The junction of sagittal and lambdoidal sutures is the: a. bregma b. lambda c. lambdoidal suture d. squamosal suture
d. lambda
Which suture is located between the occipital and parietal bones? a. coronal b. sagittal c. squamosal d. lambdoidal
d. lambdoidal
Identify the highlighted structure. a. frontal bone b. parietal bone c. temporal bone d. occipital bone e. sphenoid bone
d. occipital bone
Which area of the cranial floor is defined as a deep depression posterior to petrous ridges? a. anterior cranial fossa b. internal cranial fossa c. middle cranial fossa d. posterior cranial fossa
d. posterior cranial fossa
Which structure is labeled "F"? a. glabella b. IPL c. supraorbital groove d. superciliary ridge
d. supercilliary ridge ( arch )
How many facial bones are there? a. 4 b. 7 c. 8 d. 10 e. 14
e. 14
Which radiographic landmark extends from the acanthion to the EAM? a. OML b. IOML c. GML d. IPL e. AML f. MML
e. AML ( acanthiomeatal line )
Which structure is labeled "K"? a. TEA b. acanthion c. mental point d. auricle e. EAM
e. EAM (external acoustic meatus)
Which structure is labeled "H"? a. GAL b. GML c. IOML d. AML e. MML
e. MML ( mentomeatal line )
Which structure is labeled "L"? a. TEA b. mental point c. gonion d. EAM e. auricle
e. auricle
Identify the highlighted structure. a. squamosal suture b. bregma c. coronal suture d. lambda e. lambdoidal suture
e. lambdoidal suture
Identify the highlighted structure. a. glabella b. pterion c. inion d. asterion e. mastoid process f. styloid process
e. mastoid process
Identify the highlighted structure. a. frontal bone b. parietal bone c. temporal bone d. occipital bone e. sphenoid bone
e. sphenoid bone
Which radiographic landmark extends from the center of the chin to the EAM? a. OML b. IOML c. GML d. IPL e. AML f. MML
f. MML ( mentomeatal line )
Identify the highlighted structure. a. glabella b. pterion c. inion d. asterion e. mastoid process f. styloid process
f. styloid process