Skull And Gnathostomatic System

Front 1

What type of tissue is the articular cartilage (that which forms the disk and coverings of eminence and condyle)?

Back 1

fibrocartilage (not hyaline cartilage!!!)

Front 2

What process protects the soft tissues medial to the condyle?

Back 2

entoglenoid process on medial wall of glenoid fossa

Front 3

What describes the Basion Point?

Back 3

2 lines running through the condyles at their axises intersect at the front part of the Foramen Magnum, called the Basion Point, to form an angle of ~105 degrees

Front 4

What are the average dimensions of the condyle?

Back 4

Med-Lat: 18-20mm
Ant-Post: 8-12mm

Front 5

1. Where do muscles of facial expression originate?
2. Where do they insert?

Back 5

1. originate in bone
2. insert in soft tissue

Front 6

What is the key difference between hyaline cartilage and fibrocartilage?

Back 6

hyaline cartilage has cells inside it; fibrocartilage is dense and there are no cells inside it

Front 7

What are the 4 ligaments of the TMJ?

Back 7

1. sphenomandibular
2. stylomandibular
3. lat. TMJ capsular ligament
4. collateral capsular ligament

Front 8

What 2 movements does sphenomandibular ligament of TMJ resist?

Back 8

downward and lateral

Front 9

What 2 movements does stylomandibular ligament of TMJ resist?

Back 9

downward and forward

Front 10

What 2 movements does lat. TMJ capsular ligament of TMJ resist?

Back 10

downward and posterior

Front 11

What does the collateral capsular ligament of the TMJ do?

Back 11

holds disk to condyle's head

Front 12

What nerve anesthetizes the post. mandible?

Back 12

inf. alveolar nerve

Front 13

What are the 4 major muscles of mastication?

Back 13

1. temporalis
2. masseter
3. medial pterygoid
4. lat. pterygoid

Front 14

Where does temporalis muscle originate and insert?

Back 14

O: temporal fossa
I: coronoid process's ant. region of ramus

Front 15

What does temporalis muscle do?

Back 15

elevates jaw and clenches teeth

Front 16

Where does masseter originate and insert?

Back 16

O: superficial portion: ant 2/3 of zygomatic arch
O: deep portion: medial surface of zygomatic arch
I: lateral surface of coronoid process, ramus, and gonial angle

Front 17

What is the function of the masseter?

Back 17

elevates jaw and clenches teeth

Front 18

What muscle is the "counterpart to the masseter"?

Back 18

medial pterygoid

Front 19

Where does the medial pterygoid originate and insert? (3O, 1I)

Back 19

O1: medial surface of lat. pterygoid plate
O2: pyramidal process of palatine bones
O3: max. tuberosity
I: posterior, medial, and lower surface of ramus and gonial angle

Front 20

What is the function of the medial pterygoid muscle?

Back 20

pulls mandible forward and assists rotations of mandible

Front 21

Where does the lateral pterygoid muscle originate and insert? (sup. head and inf. head each have 1 origin)

Back 21

O: sup. head - infratemporal surface of sphenoid greater wing
O: inf. head - lat. surface of lat. pterygoid plate
I: ant. portion of condylar neck and capsule

Front 22

What 2 bones does sagittal suture separate?

Back 22

both parietal bones

Front 23

What 3 bones does frontal/coronal suture separate?

Back 23

2 parietal bones and frontal bone

Front 24

What does metopic suture separate?

Back 24

1 halves of the frontal bone in an infant before they fuse

Front 25

What bone has the foramen magnum in its anterior region?

Back 25

occipetal

Front 26

The base of the occipetal bone is which synchondrosis?

Back 26

spheno-occipetal synchondrosis

Front 27

What are the 3 pairs of fossae of the base of the skull?

Back 27

2 ant, 2 middle, 2 post

Front 28

What is a diploe?

Back 28

cancellous/spongy bone between inner and outer cortical plates

Front 29

What are the 4 fontanelles in an infant?

Back 29

1. anterior
2. posterior
3. sphenoid
4. mastoid

Front 30

What is the sensory component of V1, V2, V3 of CN V?

What branch of CN V also has SVE as part of its motor function?

Back 30

GSA

mandibular branch V3

Front 31

What are the 2 sensory and motor components of V3 of CN V?

Back 31

SVE, GSA

Front 32

All 3 foramen for the branches of CN V are in what skull bone?

Back 32

sphenoid

Front 33

What are the 3 major branches of V1?

Back 33

1. lacrimal branch
2. frontal branch
3. nasociliary branch

Front 34

What are the 2 branches of the frontal branch of V1?

Back 34

1. supra-orbital
2. supra-trochlear

Front 35

What are the 4 branches of the nasociliary branch of V1?

Back 35

1. posterior ethmoidal
2. anterior ethmoidal
3. infratrochlear
4. long ciliary

Front 36

What are the 5 major branches of V2?

Back 36

1. posterior superior alveolar
2. zygomatic
3. infraorbital
4. descending palatine
5. pterygopalatine (sphenopalatine)

Front 37

What are the 2 branches of the zygomatic branch of V2?

Back 37

1. zygomatical facial
2. zygomatical temporal

Front 38

What are the 2 branches of the descending palatine branch of V2?

Back 38

1. greater palatine branch
2. lesser palatine branch

Front 39

What are the 3 branches of pterygopalatine branch of V2?

Back 39

1. nasopalatine
2. posterior nasal
3. pharyngeal

Front 40

What are the 4 major branches of V3?

Back 40

1. auriculotemporal
2. inferior alveolar
3. lingual
4. long buccal

Front 41

What are the 2 branches of the inferior alveolar branch of V3?

Back 41

1. mental
2. mylohyoid

Front 42

What part of the body do greater and lesser palatine nerves innervate?
What are these branched from?

Back 42

posterior palate

branches of descending palatine branch of V2