S2 Anatomy Exam 3: Oral Cavity

Front 1

The oral cavity roof is formed by the ____________

floor by the ___________

lateral walls (cheeks) by the _________

Back 1

hard & soft palate

mylohyoid, geniohyoid, & tongue

buccinator muscle

Front 2

The upper dentition is innervated by what?


attached to what bone

Back 2

anterior, middle, & posterior superior alveolar nerves (V2)

maxillae

Front 3

The lower dentition is innervated by what?


attached to what bone?

Back 3

inferior alveolar nerve (V3)


mandible

Front 4

The buccinator muscle forms the cheek & serves what function during chewing?

What innervates it?

What pierces this muscle?

Back 4

holds cheeks against alveolar arches & keeps food btwn teeth during chewing

buccal branch of facial nerve
(sensory via long buccal n. from mandibular (V3)

pierced by parotid duct (which ends near 2nd maxillary molar)

Front 5

What is the function of the mylohyoid & geniohyoid muscles?

what innervates each muscle?

Back 5

both depress mandible when hyoid is fixed & elevate & pull hyoid forward when mandible is fixed

mylohyoid- nerve to mylohyoid (inf. alveolar, V3)

geniohyoid- C1 (via hypoglossal n)

Front 6

What vein lies superficially on each side of lingual frenulum (under tongue)?

Why is this clinically important?

Back 6

deep lingual vein

allows for rapid drug absorption under tongue

Front 7

what 2 salivary glands are in the floor of the oral cavity?

where do they receive parasympathetic (GVE) fibers from?

Back 7

submandibular & sublingual glands

from chorda tympani (facial N) via submandibular ganglion

Front 8

What are the 2 parts of the tongue?

Back 8

ant 2/3 = oral part or body
(apex sits directly behind incisors, covered w/ papilla w/ taste buds (except filiform papilae))

post 1/3= pharyngeal part or root
(attached to mandible & hyoid bone, covered w/ lingual tonsil)

Front 9

What separated the oral & pharyngeal parts of the tongue?

What is the foramen cecum?

Back 9

terminal sulcus


depression in apex of terminal sulcus, marks site of embryonic thyroid development

Front 10

What do the intrinsic tongue muscles do?

Back 10

change shape of tongue

(originate & insert w/i tongue)

Front 11

What do the extrinsic tongue muscles do?

Back 11

protrude, retract, depress, & elevate tongue (alter position)

(originate outside tongue & insert w/i tongue)

Front 12

4 extrinsic tongue muscles

Back 12

genioglossus -- depress & protrude
hypoglossus -- depress
styloglossus --elevate & retract
palatoglossus

-all inervated by hypoglossal n
EXCEPT palatoglossus, innervated by vagus n

Front 13

What nerve supplies sensory (GSA) to the mucosa of the anterior 2/3 of the tongue & taste (SVA) from the ant of the tongue via Chorda tympani (facial n)?

Back 13

Lingual nerve (V3)

Front 14

What nerve supplies sensory (GSA) & taste (SVA) from the posterior 1/3 of tongue?

Back 14

glossopharyngeal nerve

Front 15

What nerve supplies sensory (GVA) & taste (SVA) from a small area next to the epiglottis (extreme root of tongue) via branches from the inernal laryngeal nerve?

Back 15

Vagus nerve

Front 16

What nerve supplies GSE (motor) to the tongue?

Back 16

hypoglossal nerve

Front 17

-Parasympathetic ganglion “suspended from” lingual nerve
-Preganglionic fibers from chorda tympani arrive via lingual nerve
-Postganglionic fibers continue on to innervate the submandibular and sublingual salivary glands

What ganglion?

Back 17

submandibular ganglion

Front 18

Blood supply to the tongue

Back 18

*lingual artery
branches:
-dorsal lingual
-deep lingual
-sublingual

Front 19

Venous drainage of tongue

Back 19

dorsal lingual vein
deep lingual vein
sublingual vein

(same as arterial branches)

Front 20

The hard palate separates the oral & nasal cavity. What is the hard palate formed by?

innervated by?
blood supply?

Back 20

palatine processes of maxillae & horizontal plate of palatine bones

greater & lesser palatine & nasopalatine nerves (V2)

greater & lesser palatine arteries (from

Front 21

5 muscles on each side contribute to formation & movement of the soft palate. What are they?

Back 21

tensor veli palatini-- tenses palate, opens tube
levator veli palatini-- elevates palate
palatoglossus-- depresses palate, elevates tongue
palatopharyngeus-- depress palate, elevates pharynx
musculus uvulae-- elevates & retracts uvula

Front 22

ALL of the muscles of the soft palate are innervated by the pharyngeal branch of the vagus nerve via the pharyngeal plexus
EXCEPT _________

Back 22

tensor veli palatini
-innervated by nerve to medial pterygoid (V3)

Front 23

The _____________& ____________ muscles moves the palatopharyngeal arch toward the midline

Back 23

palatopharyngeus & palatoglossus muscles

Front 24

3 stages of swallowing

Back 24

stage 1: muscles of tongue & soft palate compross bolus against palate & push it from mouth into oropharynx
stage 2: soft palate elevates & seals off nasopharynx, larynx elevates & pulls forward, widening & shortening oropharynx
stage 3: sequential contraction of 3 pharyngeal constrictor muscles forces bolus into esophagus

Front 25

What is the ONLY voluntary stage of swallowing?

Back 25

stage 1