Osteology of Skull

Question 1

What bones surrund greater wingo fsphenoid bone (3)

Answer 1

Forntal, Parietal ,and Temproal bone

Question 2

What forms the calvaria (4)

Answer 2

frotnal bne, pariatal bones, and the squamous parts of teh temporal and occipital bones

Question 3

What are the bones of the cranium (6)

Answer 3

Frontal bone
Paired parietal bones
Paired temporal bones
Single occipital bone
Single sphenoid bone
Single ethmoid bone

Question 4

Posterior Articulation

Answer 4

Parietal bones via the Coronal Suture

Question 5

Inferior Articulation (6)

Answer 5

Sphenoid
Zygomatic 
Lacrimal
Maxiallary
Nasal
Ethmoid bones

Question 6

What runs through supraorbital Notch (foramen)

Answer 6

Supraorbital Nerve and Artery

Question 7

What are superciliary ridges

Answer 7

brow ridges

Question 8

What is the Zygomatic Process

Answer 8

for articulation with zygomatic bone

Question 9

What is the coronal suture

Answer 9

From side to side across top of skull

Divides frontal bone from teh two parietal bones

Question 10

What is the Lambdoid suture

Answer 10

where parietal bones meet occipital bone

Question 11

What are superior and inferior temproal lines

Answer 11

continue posteriorly onto parietal bones- for attachemnt of

(superior) TEMPORALIS FASCIA and (inferior) Temporalis MUSCLE

Question 12

What is the Pterion

Answer 12

“dont get hit in teh temple)

This is the thinnest part of the skull!
Translucent

Grooves for Meningeal vessesls

Question 13

What are Grooves in Frontal bone for

Answer 13

on inside surface for meningeal vessels

Can be seen Pterion

Question 14

What are Sinuses

Answer 14

part of paranasal sinus sytem- usually drain through ethmoid sinuses

Question 15

How do parietal bones articulate medially

Answer 15

Via the Sagittal Suture

Question 16

How do parietal bones articulate Anteriorly

Answer 16

With frontal bones via coronal suture

Question 17

How doe Paritetal bones articualte posterioly

Answer 17

with occipital bone via Lambdoid suture

Question 18

What do parietal bones articualte with inferiorly

Answer 18

Temporal bones

Question 19

Foramen for Emissary Vein

Answer 19

near sagittal border

Question 20

What are intrasutural bones

Answer 20

rare, called “inca bones” b/c prominent in Inca iIndieanns

Question 21

Which bone contains the FORAMEN MAGNUM

Answer 21

Occipital Bone

Question 22

What does Occipital bone articulate with anteriorally and laterally

Answer 22

Mastoid and petrous parts of temporal bones

Question 23

What does Occipital bone articualte with Anterioly

Answer 23

Sphenoid bone at the midlein

Question 24

What does Occipital bone articualte with infeirorly

Answer 24

Superior articular facets of the atlas vertebra via teh occipital condyles forming ATLANTOOCCIPITAL JOINTS

Question 25

What three cranial nerves come out of jugular foramen

Answer 25

Vagus N Glossopharyngeal N Accessory N

Question 26

What are the foramina from anterior to posterior on inferior skull

Answer 26

Open Some Canned Jugs Hun ``` Foramen Ovale Foramen Spinosum Carotid Canal Jugular Canal Hypoglaossal Canal ```

Question 27

Which bone is the "yes" bone?

Answer 27

Atlas!!! Its articulation with teh Occipital COndyle allows one to say yes

Question 28

What is the No Bone

Answer 28

2nd Cervical Vertebrae Atlas rotates on dens of 2nd vertical vertebrae (axis)

Question 29

What is Diploe

Answer 29

Cancellous bone of the skull Where CSF is circulated around brain and recycled trhough Arachnoid Granulations

Question 30

What is the Sulcus for Superior Sagittal Sinus

Answer 30

Characteristic fo vein with endothelial-like structures Formed by reflection of meninges that surrounds brain Major stucture draining blood from brain Brings blood from brain and Ends up draining into IJV --> Jugualr forament

Question 31

WHat can be torn when you fracture the BASE OF THE SKULL

Answer 31

the Meninges! B/c DUra is very adherant to base of skull, allows CSF to escape to various places in skull Commonly through ears and nasal cavities

Question 32

What is the Sigmoid Sulcus

Answer 32

Big dura venous drainage structures for brain | Internal/External Connection

Question 33

What do surgeons need to break through in order to get to Pituitary gland?

Answer 33

Hypophyseal Fossa

Question 34

What doe sthe Anterior Cranial Fossae consist of

Answer 34

Frontal lobs of brain Olfactory bulbs and trats Cribiform foramina

Question 35

What is in Middle Fossa

Answer 35

Butterfly ``` Temporal lobes fo brain Pituitary gland Foramina Rotundum Foramina Ovale Foramina Spinosum Superior Orbital Fissures Optic Canals ```

Question 36

What is in the Posterior Cranial Fossa

Answer 36

``` Midbrain Pons Meduall of brain stem Cerebellum Foramen magnum Jugular foramen Internal Acoustic Meatus Hypoglossal Canal ``` Condylar Canal and Mastoid Foramen Des

Question 37

Describe what kind of bone Fontalles

Answer 37

Ossified Developing bones will slide on each other Humans can barely amke it thorugh birth canal Areas in calvaia of new born infants where sutures do not meet and there is a gap between teh bones closed with mabranous tissue has not yet ossififed

Question 38

Bregma

Answer 38

Anterior Fontanelle | future site of Bregma

Question 39

Lambda

Answer 39

Posterior Fontanelle, future site of lamba