Lecture 18

Question 1

What are the two parts of the skull?

Answer 1

1) cranium

2) facial skeleton

Question 2

What are the 6 bones of the cranium?

Answer 2

1) frontal bone
2) parietal bones
3) occipital bone
4) temporal bones
5) ethmoid
6) sphenoid

Question 3

Which bone forms the forehead?

Answer 3

Frontal bone

Question 4

The frontal bone is an ________ bone located at the ________ part of the cranium. It’s inferior surface is the ________ _____ and its posteriorly bounded by the ________ ______.

Answer 4

Unpaired; anterior; orbital margin; coronal suture

Question 5

Which bone forms the bulk of the brain case?

Answer 5

Parietal bones

Question 6

Which cranial bone is located superiorly, laterally, and posteriorly?

Answer 6

Parietal bones

Question 7

The parietal bones superior midline is the _______ ______ and it joins the frontal bone anteriorly at the _______ ______.

Answer 7

Sagittal suture; coronal suture

Question 8

The infant skull parietal bones have ______ and ________ __________.

Answer 8

Anterior and posterior fontanelle

Question 9

Which bone forms the posterior and inferior portion of the brain case?

Answer 9

Occipital bone

Question 10

The occipital bone articulates superiorly with the ________ bones.

Answer 10

Parietal

Question 11

What is the foramen magnum?

Answer 11

The inferior foramen in the occipital bone where the spinal cord passes through

Question 12

What structures are lateral to the foramen magnum?

Answer 12

Occipital condyles

Question 13

The occipital condyles communicate with the _____

Answer 13

Atlas

Question 14

The portion of the occipital bone anterior to the foramen magnum is called the ______ portion, It forms the ____ of the ________.

Answer 14

Basilar; roof of the pharynx

Question 15

Which bone forms the lateral base of the brain case?

Answer 15

Temporal bones

Question 16

What are the five parts of the temporal bones?

Answer 16

1) squamous
2) mastoid process
3) styloid process
4) petrous portion
5) tympanic portion

Question 17

Which part of the temporal bones is the anterior projections of lateral portion of the skull?

Answer 17

Squamous

Question 18

Which part of the temporal bones is posterior and inferior to the EAM?

Answer 18

Mastoid process

Question 19

Which part of the temporal bones is the origin of several uncles including the stylohyoid, styloglossus, and stylopharungeus?

Answer 19

Styloid process

Question 20

Which part of the temporal bones is the base of the skull, is very hard, and houses the hearing organs?

Answer 20

Petrous portion

Question 21

Which part of the temporal bones is continuous with the EAM?

Answer 21

Tympanic portion

Question 22

The ethmoid bone is projected _________ and ________ from the _____ plates of the frontal bone.

Answer 22

Inferiorly; posteriorly; orbital

Question 23

What are the five main structures of the ethmoid?

Answer 23

1) cruciform plate
2) crista galli
3) superior nasal turbinate
4) medial nasal turbinate
5) perpendicular plate

Question 24

What are the two horizontal structures of the ethmoid?

Answer 24

1) cruciform plate

2) crista galli

Question 25

What are the three vertical parts of the ethmoid?

Answer 25

3) superior nasal turbinate 4) medial nasal turbinate 5) perpendicular plate

Question 26

What is the cruciform plate?

Answer 26

A porous flat surface of the ethmoid

Question 27

What is the crista galli?

Answer 27

The superior projection of the ethmoid

Question 28

What structures for the lateral walls of the nasal cavities?

Answer 28

The superior and middle nasal turbinates

Question 29

The __________ _____ forms the upper portion of the bony nasal septum.

Answer 29

Perpendicular plate

Question 30

Which bone is probably the most complicated in the body?

Answer 30

Sphenoid bone

Question 31

Which bone communicates with all the other cranial bone as well as some facial bones?

Answer 31

Sphenoid bone

Question 32

What does the sphenoid bone look like when removed from the rest of the skull?

Answer 32

A bat with wings spread

Question 33

What are the 4 major parts of the sphenoid bone?

Answer 33

1) body 2) greater wing 3) lesser wing 4) pterygoid plates

Question 34

The sphenoid body is the _____ portion of the bone. It’s superior surface has a _________ called the _____ _____ which houses the ________ gland.

Answer 34

Central; depression; sella turcica; pituitary

Question 35

The greater wing of the sphenoid bone attached to the _______ surfaces of the body, course _____ and _______ to for the _______ wall of the _______ cavity.

Answer 35

Lateral; superior ally and laterally; posterior; orbital

Question 36

The lesser wings of the sphenoid bone originate form the _______-_______ aspect of the body, course _______ and _______, are _______ to the greater wings, and contribute to the _______ cavities.

Answer 36

Anterior-superior; laterally and anteriorly; superior; orbital

Question 37

The pterygoid plates have one ____ on each side, so one ____ and one ______ pterygoid plate for each side.

Answer 37

Pair; medial; lateral

Question 38

What are the two parts of the pterygoid plates?

Answer 38

1) pterygoid fossa | 2) hamulus

Question 39

What is the pterygoid fossa?

Answer 39

The space between the medial and lateral plates

Question 40

What is the hamulus?

Answer 40

Located at the end of the medial pterygoid plate

Question 41

What are the 2 functions of the sinuses?

Answer 41

1) reduce skull weight | 2) contribute to nasal resonance

Question 42

The sinuses are lined with _______ ______ ________ And are continuous with the _____ ______

Answer 42

Ciliated mucous membrane; nasal cavity

Question 43

What are the four paranasal sinuses?

Answer 43

1) frontal 2) sphenoid 3) maxillary 4) ethmoid

Question 44

Which sinus is paired, in the frontal bone, and deep to the eyebrows?

Answer 44

Frontal

Question 45

Which sinus is paired, superior and anterior to the pharynx, and posterior and superior to the nasal turbinates?

Answer 45

Sphenoid

Question 46

Which sinus is paired, the largest , and the body of maxillae?

Answer 46

Maxillary

Question 47

Which sinus is made of numerous thin-walled cavities?

Answer 47

Ethmoid