Pharynx, Larynx, Neck

Question 1

3 Pharynx divisions

Answer 1

oropharynx
nasopharynx
laryngopharynx

Question 2

Oropharynx

Answer 2

from palatoglossal arch to tip of soft palate and epiglottis

below soft palate & nasopharynx

Question 3

Nasopharynx

Answer 3

from choanae to tip of soft palate and epiglottis

Question 4

Laryngopharynx

Answer 4

caudal area

Question 5

True/False

Brachycephalic dogs have too little soft palate causing breathing issues

Answer 5

False

soft palate extends to laryngopharynx, much too long

Question 6

Pharyngeal function

Answer 6

swallowing (deglutition)

coordinated/complex tongue movements

Question 7

Upper oesophageal sphincter

Answer 7

cricopharyngeus

Question 8

Groups of pharyngeal muscles

Answer 8

constrictors (rostral)
dialators
shorteners

Question 9

Innervation of pharyngeal muscles

Answer 9

Vagus (CN X) & glossopharyngeal (CN IX)

Question 10

Principle larynx cartilages

Answer 10

epiglottis
thyroid
artynoid
cricoid

Question 11

Describe the Cricothyroid muscle & its innervation

Answer 11

most superficial

innervated by cranial laryngeal nerve (part of CN X)

Question 12

List the laryngeal muscles & their innervation.

Answer 12

cricothyroid - cranial laryngeal branch of vagus nerve

cricoarytenoideus dorsalis
cricoarytenoideus lateralis
thyroarytenoideus
- caudal/recurrent laryngeal branch of vagus

Question 13

Describe process of intubation

Answer 13

tube introduced through oral cavity between incisors
advanced caudally along midline
passes dorsal to tongue & ventral to hard & soft palates
tube passes palatoglossal arches & over dorsal surface of epiglottis into laryngopharynx
deviate tube ventrally to enter trachea between laryngeal cartilages