Facial Expression And Mastication

Question 1

What does the scalp attach anteriorly

Answer 1

Supraorbital margin

Question 2

Where does the scalp attach posterior

Answer 2

Superior nuchal line

Question 3

Where does the scalp attach laterally

Answer 3

Temporal fascia to zygomatic arch

Question 4

Different layers of the scalp

Answer 4

Skin
Connective tissue (dense)
Aponeurosis (Galea Aponeurotica)
Loose connective tissue 
Pericranium

Question 5

What links frontal is and occipitals muscles

Answer 5

Aponeurosis (Galea Aponeurotica)

Question 6

What layer is where the emissary vein drains to cranial sinus, and cause danger to spread infection

Answer 6

Loose connective tissue of the scalp

Question 7

Face boundaries

Answer 7

Below supraorbital margin to the chin, ear to ear

Question 8

Facial expression

Answer 8

Both scalp and face

Question 9

Ligaments in the temporomandibular joint

Answer 9

Joint capsule
Lateral temporomandibular ligament
Sphenomandibular ligament
Stylomandibular ligament

Question 10

Superior compartment of fibrocartilage disc in the temporomandibular joint

Answer 10

mandibular fossa superiorly and disc inferiorly – translational movement

Question 11

Inferior compartment of fibrocartilage disc in the temporomandibular joint

Answer 11

disc superiorly and mandibular condyle inferiorly – rotational movement

Question 12

What motions do TMJ do

Answer 12

Depression, elevation, protrusion, retrusion, retraction, side to side excursion

Question 13

Protrusion of tmj motion

Answer 13

Lateral pterygoid assisted by medial pterygoid

Question 14

Retraction of tmj motion

Answer 14

Posterior fibers of temporal is deep part of masseter and geniohyoid and digastric

Question 15

Elevation of tmj motion

Answer 15

Temporalis, masseter, medial pterygoid

Question 16

Depression of tmj motion

Answer 16

Gravity

Digastric, geniohyoid and mylohyoid muscles

Question 17

What causes Tmj popping and/clicking

Answer 17

Hypermobile joint capsule, or tight lateral pterygoid muscle or damaged disc place the disc anteriorly against the articular tubercle, mandibular condyle reduces to the disc will cause clicking or popping noise

Question 18

Temporal fossa boundary

Answer 18

Posteriorly and superiorly by the temporal lines
Anteriorly by the frontal and zygomatic bones
Laterally by the zygomatic arch
Inferiorly by the infratemporal crest
Floor: pterion (temporal/parietal/frontal/sphenoid)
Roof: temporalis fascia

Question 19

Contents of temporal fossa

Answer 19

Upper portion of temporalis

Question 20

What’s the infratemporal fossa

Answer 20

Continuous to temporal fossa

Question 21

Boundary of infratemporal fossa

Answer 21

Deep to the zygomatic arch and ramus of the mandible, posterior to the maxilla and bordered by the lateral pterygoid plate

Question 22

Contents of the infratemporal fossa

Answer 22

Lower portion of the temporalis muscle
lateral and medial pterygoid muscles
Maxillary artery
Pterygoid venous plexus
Mandibular, inferior alveolar, lingual, buccal, and chorda tympani nerves
Otic ganglion

Question 23

Pterygopalatine fossa

Boundary

Answer 23

Roof: greater wing of sphenoid
Medially: perpendicular plate of palatine
Anteriorly: the posterior aspect of the maxilla
Posteriorly: the pterygoid process
Floor: pyramidal process of palatine

Question 24

Pterygopalatine fossa Contents

Answer 24

Pterygopalatine ganglion

Pterygopalatine part of maxillary artery

Question 25

Somatic motor functions of facial nerve

Answer 25

Motor to stapedius muscle: in the middle ear
Motor to 2 suprahyoid muscles: stylohyoid and digastric posterior belly
Motor to facial expression muscles

Question 26

Visceral motor: parasympathetic motor of facial nerve

Answer 26

Pterygopalatine ganglion: lacrimal glands, nasal and palatine mucosa (greater petrosal nerve)
Submandibular ganglion: submandibular and sublingual salivary glands (chorda tympani)

Question 27

Somatic sensation of facial nerve

Answer 27

External ear

Question 28

Visceral sensation of facial nerve

Answer 28

taste of anterior 2/3 of the tongue - chemical sensation