Skull

Question 1

What are the paired bones of the cranium?

Answer 1

Parietal

Temporal

Question 2

What are the unpaired cranial bones?

Answer 2

Frontal
Occipital
Sphenoid
Ethmoid

Question 3

What are the paired facial bones?

Answer 3

Zygomatic
Lacrimal
Nasal
Palatine
Maxillae
Inferior nasal conchae

Question 4

What are the unpaired facial bones?

Answer 4

Vomer

Mandible

Question 5

Where is the bregma?

Answer 5

Intersection pt of coronal suture and sagittal suture

Question 6

Where is the lambda?

Answer 6

Intersection pt b/w sagittal and lamboid sutures

Question 7

What is the pterion? Clinically significant bc?

Answer 7

Intersection pt. Of frontal, parietal, temporal and sphenoid bones

Weakest point, and middle meningeal a. Runs below

Question 8

Where is the asterion?

Answer 8

Intersection pt. B/w squamous and lambdoid sutures

Question 9

Where does the falx cerebri attach?

What does the falx cerebri do?

Answer 9

Frontal crest of frontal bone
Crista galli of ethmoid bone

Protective Ct for brain; separates 2 hemispheres

Question 10

What is the metopic suture?

Answer 10

Divides frontal bone in half, usually not there past embryo

Question 11

What attaches to the mastoid process of the temporal bone?

Answer 11

SCm

Question 12

What is the function of the petrous portion of the temporal bone?

Answer 12

Protects inner ear

Question 13

The groove for what sinus can be found on the temporal bone?

Answer 13

Groove for the Sigmoid sinus

Question 14

What articulates with cervical vertebrae when nodding “yes”?

Answer 14

occipital condyles

Question 15

What grooves for sinuses can be found on the occipital bone?

Answer 15

Groove for
Sigmoid sinus
Transverse
Superior sagittal

Question 16

What makes the TMJ?

Answer 16

Made by condylar process articular w/ the mandibular fossa of temporal bone

Question 17

What bone are the superior and middle concha from?

Answer 17

Ethmoid bone

Question 18

What 7 bones make up the eye orbit?

Answer 18

Frontal (zygomatic process)

Sphenoid (greater and lesser wing) (lesser is roof, greater is lateral wall)

Maxilla (frontal process and perpendicular plate)

Lacrimal bone

Ethmoid bone (lateral mass)

Zygomatic bone (orbital surface)

palatine (perpendicular plate)

Question 19

What bones make up the nasal cavity?

Answer 19

Vomer (vertical plate)

palatin (perpendicular plate and horiz. Plate)

Nasal bone

Lacrimal bone (provides passageway for nasolacrimal duct)

Inferior nasal concha

Maxillary bone

Sphenoid bone

Ethmoid bone (super. And middle nasal concha, crista galli, cribriform plate)

Palatine process of maxilla

Question 20

What unites the cranial and facial bones?

Answer 20

Sphenoid

Question 21

Where does the pituitary gland sit?

Answer 21

Sella turcica, specifically the hypophyseal fossa

Question 22

Where would you find the lateral and medial pterygoid plate?

Answer 22

Sphenoid bone

Question 23

What makes up the superior orbital fissure?

Answer 23

Space between greater and lesser wing of sphenoid bone

Question 24

What are the fontanelles of the neonate?

Answer 24

Anterior, sphenoid, mastoid, posterior fontanelles

Question 25

What is a Le Fort 1 fracture?

Answer 25

Fix thru floor of maxilla and takes it posteriorly

Question 26

What is a Le Fort II fx?

Answer 26

Zygomatic/maxillary suture fracture

Pyramidal fracture

Takes off part of orbit

Question 27

What is a Le Fort III Fx?

Answer 27

Takes off zygomatic bone and more of orbit

Horizontal fx of maxillary

Question 28

How do you get surgical acces to cranial cavity?

Answer 28

Perform craniotomy - section of neurocranium (Bone flap) is elevated or removed

Healing is best when flap incorporates overlaying tissues bc msucles have lots of blood supply compared to the poor osteogenic properties of the periosteum

Question 29

How is the mandible united in a neonate?

How is union effected?

Answer 29

By a cartilaginous joint called the mandibular symphysis

Union b/w halves is effected by means of fibrocartilage