Mastication/Jaw

Question 1

2 Parts of Oral Cavity

Answer 1

Vestibule - Between cheeks and teeth (contains parotid gland and gingiva)
Oral Cavity Proper - Internal to teeth (contains tongue, uvula, tonsils, and palate)

Question 2

2 Parts of Mandible

Answer 2

Ramus
Body
These are connected by the Angle of Mandible

Question 3

4 Muscles of Mastication

Answer 3

Temporalis
Masseter
Medial Pterygoid
Lateral Pterygoid
All are innervated by Trigeminal Nerve

Question 4

Temporomandibular Joint

Answer 4

Important for mastication
Formed by the Head of Mandible and Temporal Bone
Easily dislocated when jaw is opened to wide. This is fixed by providing downward pressure

Question 5

Mandibular Tori

Answer 5

Benign growths on the mandibular portion of oral cavity

Made of bone

Question 6

Papillae of Tongue

Answer 6

Filiform (most abundant)

Fundiform (contain taste buds)

Question 7

Ankyloglossia

Answer 7

Resitricted movement of tongue due to short frenulum

Question 8

Innervation of Intrinsic Tongue muscles

Answer 8

Hypoglossal Nerve (CN 12)
Used for movement

Question 9

Innervation of Extrinsic Tongue muscles

Answer 9

Vagus Nerve (CN 10)
Genioglossus, hypoglossus, styloglossus, and palatoglossus

Question 10

Taste of Tongue

Answer 10

Anterior portion - Facial nerve (chorda tympani)

Posterior portion - Glossopharyngeal nerve

Question 11

Gleeking

Answer 11

Sudden release of saliva from mouth from submandibular gland

Caused by constriction of mylohyoid muscle

Question 12

Vallecula

Answer 12

Valley in between base of tongue and epiglottis

Often intubating tube gets misplaced here

Question 13

All muscles of soft palate are innervated by Vagus Nerve except which one

Answer 13

Tensor Palati (CN V3)

Question 14

Sleep Apnea

Answer 14

Due to dropping of tongue from excess fat or soft palate into the oral pharynx

Question 15

Ulnar Deviation

Answer 15

Occurs from lesions in Vagus Nerve

Deviates towards the unaffected side