Anatomy week 16 skull

Question 1

Explain the neurocranium + its function

Answer 1

• Neurocranium , makes up the largest part of the skull
• Protects the brain

Question 2

Name the 2 parts that the skull can be split into

Answer 2

• Neurocranium
• Viscerocranium

Question 3

Explain the viscerocranium
- What it includes

Answer 3

• Inludes the lower jaw and thion walled bones of the facial skeleton

Question 4

Name all the bones that the neurocranium contains

Answer 4

• Frontal
  -Parietal
  -Occipital
• Temporal
  -Sphenoid bone
  -Ethmoid

Question 5

Name the bones that the viscerocranium contais

Answer 5

• Mandible
  -Maxilla
  -Zygomatic
  -Lacrimal
  -Nasal
  -Palatine
  -Inferior Nasal concha
  -Vomer

Question 6

Explain the structure of the Frontal lobe + what it forms

Answer 6

• Unpaired, shell-shaped bone foroming the anterosuperior cranium

Question 7

Name the 3 parts of the Frontal Lobe

Answer 7

-Squamous part
- Orbital Parts X2
- Nasal part

Question 8

Explain the functions of the supraorbital Margin

Supraorbital Foramen In the Frontal Lobe

Answer 8

• Seperates the squamous and orbital parts
  -A passage for subraorbital vessels and nerves

Question 9

Explain the structure of the parietal bone + what it forms

Answer 9

• The parietal bones are bilateral skull bones that form the superior and lateral walls of the cranium

Question 10

Name the three parts of the occipital bone

Answer 10

• Squamous
• Condylar
  -Basilar

Question 11

What is located inferiorly on the occipital bone

Answer 11

-Occipital condyles which articulate with C1

Question 12

What does the condylar part of the Occipital bone contain

Answer 12

• 2 occipital condyles

Question 13

What lies posterior to the condyles in the occipital bone

Answer 13

• Condyloid fossa

Question 14

What is the external surface of the occipital bone marked by

Answer 14

superior & inferior nuchal lines.

Question 15

What does the occipital bone form

Answer 15

Posterior cranial fossa at the skull base

Question 16

Name the 2 foramina in the occipital bone

Answer 16

-Foramen magnum
-Condylar canals
( partly Jugular foramen)

Question 17

What are the Temporal bones- what does it form

Answer 17

Paired bones that from the middle and posterior cranial fossae

Question 18

What are the 3 parts of the Temporal bone

Answer 18

• Squamous Part
  -Petromastoid Part
• Tympanic part

Question 19

Explain the 3 parts of the temporal bone form
1. What it forms
2+ 3 , what it encloses

Answer 19

-Squamos : Forms the lateral skull
-Petromastoid Part: Encloses the middle and inner ear
- Tympanic part: Encloses the external auditory canal and the tympanic membrane

Question 20

Name the 3 processes of the Temporal bone

Answer 20

• Mastoid process
• Zygomatic process
• Styloid process

Question 21

Name the 4 foraminas ( openings) of the temporal bone)

Answer 21

• Internal acoustic meatus
  -External acoustic meatus
  -Carotid canal
  -Stylomastoid foramen

Question 22

What does the Sphenoid bone form

Answer 22

• Posterior orbit, middle cranial fossa floor, lateral skull wall

Question 23

What does the sphenoid contain

Answer 23

-Great and lesser wings

Question 24

Explain what the greater and lesser wings form in the sphenoid bone

Answer 24

Greater wings form: The middle cranial fossa, lateral skull walls
Lesser wings form the : Posterior anterior cranial fossa

Question 25

What does the sphenoid body enlcose in the sphenoid bone

Answer 25

- Sphenoid sinus

Question 26

What do the Pterygoid process in the sphenoid bone project inferiorly with

Answer 26

- Medial pterygoid plate -Lateral pterygoid plate

Question 27

What does the ethmoid bone form (4)

Answer 27

- Anterior cranial fossa - Medial orbital -Nasal septum -Laterl nasal walls

Question 28

What is the function of the perpendicular plate in the ethmoid bone

Answer 28

- Contriubtes to the nasal septum

Question 29

Name the 2 processes of the Ethmoid bone

Answer 29

- Crista galli -Superio and medial nasal concha

Question 30

What do the ethmoid air cells form

Answer 30

Ethmoid sinuses

Question 31

What does the maxillary bone form

Answer 31

- Upper jaw and parts of the nose

Question 32

Name the 2 processes of the maxillary bone

Answer 32

- Palatine process -Frontal processes

Question 33

Name the 1 foramen that the maxillary bone contains

Answer 33

- Infraorbital foramen

Question 34

What does the mandible connect to

Answer 34

Ramus

Question 34

Name the 2 processes in the mandible

Answer 34

- Coronoid process -Condylar process

Question 35

Name the 2 Foramens in the mandible

Answer 35

- Mental foraman(external) - Manidbular foramen(Internal)

Question 36

What does the nasal bones form

Answer 36

- Bridge of the nose

Question 37

What does the zygomatic bones form

Answer 37

- Cheekbones

Question 38

What does the vomer form

Answer 38

- Inferior and posterior nasal spetum

Question 39

What is tempromandibular joint formed by

Answer 39

- Mandible and Temporal bone

Question 40

What are the articulating surfaces of the temporomandibular covered by

Answer 40

- Fibrocartilage

Question 41

Name the articulating surfaces of the temporomandibular

Answer 41

- Mandibular fossa -Articular tubercle -Head of the mandible