Unit 2- Skull

Question 1

What does neurocranium refer to?

Answer 1

cranial vault

Question 2

What is the purpose of the Neurocranium?

Answer 2

-protects brain
-houses the organs of hearing and balance
-site of attachment for head and neck muscles

Question 3

What makes up the Neurocranium?

Answer 3

4 singular bones (Frontal, Ethmoid, Sphenoid, & Occipital)
2 sets of paired bones (Temporal & Parietal)

Question 4

What is the Calvarium?

Answer 4

domelike roof of neurocranium

Question 5

What makes up the Calvarium?

Question 6

What is a fontanelle?

Answer 6

membranous interval at the margins of cranial bones in fetal skull

Question 7

What type of person has a fontanelle?

Answer 7

fetus/ infant

Question 8

What makes it a supraorbital notch vs supraorbital foramen?

Answer 8

A notch is not closed
A foramen is a closed circle

Question 9

What is described as a boomerang?

Answer 9

Inferior orbital fissure and Superior orbital fissure

Question 10

What is the feature of a supraorbital notch/ foramen?

Answer 10

passage for Branch of Cranial Nerve V1 (Supraorbital Nerve)

Question 11

What is the feature of a infraorbital notch/ foramen?

Answer 11

passage for Branch of Cranial Nerve V2 (Infraorbital Nerve)

Question 12

What is the feature of Superior orbital fissure?

Answer 12

passage for Cranial Nerves III, IV, V1, and VI

Question 13

What is the feature of Inferior orbital fissure?

Answer 13

passage for Branch of Cranial Nerve V2 (Infraorbital Nerve)

Question 14

What is the feature of Nasolacrimal Canal?

Answer 14

passage for Nasolacrimal duct

Question 15

What combined makes the zygomatic arch?

Answer 15

Zygomatic process (of temporal bone) + Temporal process (of zygomatic bone)

Question 16

Why is the Carotid Canal important?

Answer 16

Passage for Internal Carotid artery

Question 17

Why is the Stylomastoid Foramen important?

Answer 17

Passage for Cranial nerve VII (Facial Nerve)

Question 18

Why is the Occipital Condyle important?

Answer 18

Articulates with first cervical vertebrae (atlas)

Question 19

Why is the Mastoid Process important?

Answer 19

Attachment of SCM

Question 20

Why is the Mandibular Fossa important?

Answer 20

Articulates with the mandible (through the condylar process)

Question 21

Why is the Cribriform Plate important?

Answer 21

passage for CN I (Olfactory Nerves)

Question 22

Why is the Optic Canal important?

Answer 22

passage for CN II (Optic Nerve)

Question 23

Why is the Superior Orbital Fissure important?

Answer 23

passage for Cranial Nerves III, IV, V1, and VI

Question 24

Why is the Foramen Rotundum important?

Answer 24

passage for CN V2 (Maxillary Branch of Trigeminal N.)

Question 25

Why is the Foramen Ovale important?

Answer 25

passage for CN V3 (Mandibular Branch of Trigeminal N.)

Question 26

Why is the Foramen Spinosum important?

Answer 26

passage for Middle Meningeal Vessels

Question 27

Why is the Foramen Lacerum important?

Answer 27

NOT ACTUALLY IMPORTANT, IT'S JUST THERE passage for NOT a true opening - filled with cartilage when alive

Question 28

Why is the Internal Acoustic Meatus important?

Answer 28

passage for CN VIII (Vestibulocochlear)

Question 29

Why is the Jugular Foramen important?

Answer 29

passage for Internal Jugular V., Cranial Nerves IX, X & XI

Question 30

Why is the Hypoglossal Canal important?

Answer 30

passage for CN XII (Hypoglossal N.)

Question 31

Why is the Foramen Magnum important?

Answer 31

passage for Vertebral Arteries, Spinal Cord, CN XI (Accessory N.)

Question 32

Why is the Crista Galli important?

Answer 32

Attachment site for Falx Cerebri

Question 33

Why is the Sella Turcica important?

Answer 33

Houses Pituitary Gland

Question 34

Why is the Petrous Portion (of Temporal Bone) important?

Answer 34

Protects structures of inner ear

Question 35

What two things make up a nasal septum?

Answer 35

perpendicular plate + vomer bone

Question 36

Why is the Condylar Process important?

Answer 36

Articulates with mandibular fossa

Question 37

Why is the Mental Foramen important?

Answer 37

Passage for mental nerve and vessels

Question 38

Why is the mandibular foramen important?

Answer 38

Passage for inferior alveolar nerve (where you are injected with anesthetic during dental procedures)