Bones - Cranial Vault

Question 1

Frontal Bone

Answer 1

• Superciliary arch
• Supraorbital margin
• Supraorbital foramina (enclosed) or notch (in margin)
• Glabella
• Zygomatic process
• Fossa for lacrimal gland
• Frontal sinus

Articulation: Parietal bones (coronal suture), nasal, zygomatic, ethmoid, sphenoid, lacrimal bones, maxillae

Question 2

Occipital Bone

Answer 2

• Highest nuchal line
• Superior nuchal line
• Inferior nuchal line
• External occipital protuberance
• Occipital condyles
• Hypoglossal canal
• Internal occipital protuberance
• Foramen magnum

Articulation: Parietal bones (lambdoid suture), temporal bones (occipitomastoid sutures), sphenoid bone, atlas (C1 vertebra)

Question 3

Sphenoid

Answer 3

• Greater wing (orbital, temporal, cerebral surfaces)
• Lesser wing
• Body (openings of sphenoid sinuses)
• Medial pterygoid processes/plates
• Lateral pterygoid processes/plates
• Superior orbital fissure
• Foramen rotundum
• Foramen ovale
• Foramen spinosum
• Optic canal
• Sella turcica
• Anterior and posterior clinoid processes

Articulation: Zygomatic, frontal, parietal, temporal, occipital, ethmoid, and palatine bones

Question 4

Ethmoid

Answer 4

• Cribriform plate
• Crista galli
• Orbital plate
• Ethmoidal labyrinth containing ethmoid cells
• Superior and middle nasal concha

Articulation: Frontal, sphenoid, nasal, lacrimal, palatine bones, and vomer

Question 5

Parietal Bones

Answer 5

• Furrows for middle meningeal vessels
• Superior temporal line
• Inferior temporal line

Articulation: Frontal bone (coronal suture), other parietal bone (saggital suture), temporal bones (temporal/squamous suture), and sphenoid bone

Question 6

Temporal Bones

Answer 6

• Mastoid process
• Styloid process
• Zygomatic process
• Internal and external acoustic meatus
• Stylomastoid foramen
• Carotid canal
• Mandibular fossa
• Auditory tube

Articulation: Parietal, occipital, zygomatic, sphenoid bones, and mandible