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Anatomy Exam #2 > Skull > Flashcards

Skull Flashcards

1
Q

An interparietal suture

A

sagittal

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2
Q

A suture between the frontal and two parietal bones

A

coronal

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3
Q

A suture between the occipital and two parietal bones

A

lambdoidal

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4
Q

A suture between the temporal and parietal bones

A

squamosal

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5
Q

Junction of sagittal and coronal sutures

A

bregma

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6
Q

Junction of sagittal and lambdoidal sutures

A

lambda

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7
Q

What is another name for the EOP?

A

inion (most prominent projection of the protuberance)

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8
Q

Junction of coronal suture, squamosal suture, and greater wing of sphenoid; weak point over meningeal artery

A

pterion

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9
Q

Describe the anterior fontanelle.

A
  • Located at the junction of the sagittal and coronal sutures
  • Becomes bregma later in development
  • Closes at 18 months of age
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10
Q

Describe the posterior fontanelle.

A
  • Located at the junction of lambdoidal and sagittal sutures
  • Becomes lambda later in development
  • Closes at 3 months of age
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11
Q

What are the two main parts of the skull?

A
  • Neurocranium (cavity that surrounds/protects brain and brainstem)
  • Viscerocranium (cavity that forms the anterior and lower regions of the skull)
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12
Q

How many nuerocranial bones are there? Name them.

A

8 bones

  • Frontal (1)
  • Parietal (2)
  • Temporal (2)
  • Occipital (1)
  • Sphenoid (1)
  • Ethmoid (1)
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13
Q

How many viscerocranial bones are there? Name them.

A

14 bones

  • Nasal (2)
  • Lacrimal (2)
  • Palatine (2)
  • Inferior nasal concha (2)
  • Maxilla (2)
  • Zygomatic (2)
  • Mandible (1)
  • Vomer (1)
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14
Q

What are the are the pits on the internal aspect of the parietal bones, near the sagittal suture, formed by arachnoid granulations?

A

granular fovea

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15
Q

What are the four parts of the temporal bones?

A
  • Squamous: broad, flat surface; includes zygomatic process
  • Petrous: dense bone; includes middle and inner ear
  • Tympanic: middle portion; includes external auditory meatus and styloid process
  • Mastoid: spongy bone containing air cells; includes mastoid process, the attachment for SCM
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16
Q

What is the difference between the maxilla and mandible?

A

Maxilla is upper jaw and mandible is lower jaw

17
Q

Which two bones form the jugular foramen?

A

temporal bone (petrous portion) and occipital bone

18
Q

Which part of the frontal bone articulates with the zygomatic bone?

A

zygomatic process

19
Q

What does the zygomatic bone articulate with?

A
  • Sphenoid
  • Frontal (zygomatic process)
  • Temporal (zygomatic process)
  • Maxilla
20
Q

Which muscles attach to the medial pterygoid plate?

A

muscles of the pharynx

21
Q

Which muscles attach to the lateral pterygoid plate?

A

medial and lateral pterygoid

22
Q

Where are the concha located and what are their purpose?

A
  • Superior and middle concha are part of the ethmoid bone
  • Inferior concha is considered its own bone
  • Purpose is to increase the surface area in nasal cavities and to warm the air coming in
23
Q

Extremely thin bones surrounding air cells (sinuses)

A

lamina papyracea

24
Q

What is the most important part of the mandible?

A

Mandibular foramen because it allows for passage of inferior alveolar nerve, which innervates all of the teeth of the lower jaw.

25
Q

What causes cleft palate?

A

When maxillary bones do not meet and fuse completely at the midline.

26
Q

Which part of the maxilla articulates with the frontal bone?

A

frontal process

27
Q

What is the distinguishing feature of the palatine bones?

A

L-shaped

28
Q

What is an important space formed by the pterygoid of sphenoid and the palatine?

A

pterygopalatine fossa

29
Q

What is the zygomatic arch formed by?

A

Union of zygomatic process of temporal bone w/ temporal process of zygomatic bone

30
Q

The lacrimal bones form the ______ wall of the orbit.

A

medial

31
Q

The region where the internasal suture meets the frontal bone.

A

nasion

32
Q

Which bone forms the inferior and posterior aspect of the bony nasal septum?

A

vomer

Anatomy Exam #2 (12 decks)

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