L1: Skull

Question 1

What are the Muscles of Mastification?

Answer 1

Temporalis
Masseter
Lateral Pterygoid
Medial Pterygoid

Question 2

What are the Muscles of Mastication Innervated by?

Answer 2

Anterior trunk of mandibular nerve

Question 3

Temporalis

Answer 3

O: Temporal Fossa
I: Coronoid Process & Ramus of Mandible
F: Elevates and Retracts Mandible
NS: Mandibular Nerve -> Deep Temporal Nerve

Question 4

Masseter

Answer 4

O: Zygomatic Bone & Arch
A: Angle & Lateral Surface (Ramus) of Mandible
F: Elevates and Protracts Mandible
NS: Mandibular Nerve -> Masseteric Nerve

Question 5

Lateral Pterygoid

Answer 5

O: Greater Wing of Sphenoid and L-Pterygoid Plate
I: Condyloid process of mandible
F: Bilaterally Protracts and Depresses Mandible
Unilaterally Swings Jaw Contralaterally
NS: Mandibular Nerve

Question 6

Medial Pterygoid

Answer 6

O: Maxilla and Medial Pterygoid Plate
I: Medial Surface (Ramus) of Mandible
F: Acts Synergistically w/ Masseter (Elevates & Protracts)
NS: Mandibular Nerve

Question 7

How Many Bones does the Human Skull Have?

Answer 7

8 Cranial
14 Facial

Question 8

What are the 8 Cranial Bones?

Answer 8

Frontal Bone
Occipital Bone
Parietal Bone (Paired)
Temporal Bone (Paired)
Ethmoid
Sphenoid

Question 9

What are the 14 Facial Bones?

Answer 9

Vomer Bone
Mandible
Maxilla (Paired)
Nasal Bone (Paired)
Lacrimal (Paired)
Zygomatic (Paired)
Palatine Bone (Paired)
Inferior Conchae (Paired)

Question 10

Which Skull bones are Unpaired?

6

Answer 10

Frontal
Occipital
Sphenoid
Ethmoid
Vomer
Mandible

Question 11

What does the Saggital Suture Connect?

Answer 11

2 Parietal Bones

Question 12

What does the Lamdoid Suture Connect?

Answer 12

Parietal and Occipital Bones

Question 13

What does the Coronal Suture Join?

Answer 13

Parietal and Frontal Bones

Question 14

What does the Squamous Suture Join?

Answer 14

Parietal and Temporal Bones

Question 15

What are the 3 Regions where the Sutures Come in Contact with each other?

Answer 15

Lambda - Sagittal and Lambdoid Sutures
Bregma - Sagittal and Coronal Sutures
Pterion - Coronal and Squamous Suture

Question 16

There are 6 total Conchae Bones (3 Paired). What are they and what Bones are they a part of?

Answer 16

Superior and Middle Conchae are a part of the Ethmoid Bone
Inferior Cobchae are their own bones

Question 17

Which Bones form the Cranial Cavity?

8 (include which are paired)

Answer 17

Frontal bone
Parietal bones (paired, two)
Temporal bones (paired, two)
Occipital bone
Sphenoid bone
Ethmoid bone

Question 18

Which Bones surround the Orbit/Eyesocket?

7 (not including paired)

Answer 18

Frontal bone
Sphenoid bone
Ethmoid bone

Zygomatic bones
Maxillae
Lacrimal bones
Palatine bones

Question 19

Which Bones make up the boundary of the nasal cavity?

5 (not including pairs)

Answer 19

Nasal bones (paired, two)
Maxilla
Ethmoid bone
Palatine bones (paired, two)
Inferior nasal conchae (paired, two)

Question 20

What is the Nasal Opening on the Skull called?

Answer 20

Piriform Aperture

Question 21

What is the most frequently fractured bone in the Skulls Cranium?

Answer 21

Located on the inferior side of the cranium, the sphenoid bone would seemingly be well protected from trauma. Actually, just the opposite is true, and in fact the sphenoid is the most frequently fractured bone of the cranium. It has several broad, thin plate-like extensions that are perforated and weakened with numerous foramina. A blow to almost any portion of the skull causes the buoyed, fluid-filled brain to rebound against the vulnerable sphenoid bone, often causing it to fracture.

Question 22

What occurs if two palatine processes fail to join during early prenatal development?

Answer 22

If the two palatine processes fail to join during early prenatal development, a cleft palate results.
A cleft lip lateral may accompany a cleft palate to the midline. These conditions can be surgically treated with excellent success. A more immediate problem, however, is that a newborn with a cleft palate may have a difficult time swallowing while nursing because it is unable to create the necessary suction within the oral cavity.