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Flashcards in Gag Reflex Deck (37):
1

What su the pharynx involved in

Breathing
Sneezing
Coughing
Speech
Vomiting
Swallowing
Gagging

2

How does the pharynx protect against aspiration

Aspiration - inhalation of solids/liquids into lungs such a fragments of teeth etc

3

Where is the nasopharynx

Posterior to nasal cav
Base of sphenoid down soft palate to inferior border
Pharyngeal tonsils

4

Where is the oropharynx

Beihind oral cav

5

Where is the laryngopharynx

From superior border of epiglottis and runs down and meets oes start at C6

6

What does the eustanchion/auditory tube do

Connects pharynx up to Middle ear

7

What are the layers from the pharynx to cervical vertebrae

Pharynx
Pharyngeal muscle
Buccooharyngeal fascia
Alar fascia
Retropharyngeal space
Prevertebral fascia
Prevertebral muscle
Anterior longitudinal ligament
Vertebrae

8

What are the external layer of muscles of the pharynx known as

Circular muscles which overlap eachother

9

are the circular muscles vol or invol

Vol

10

Even though the circular muscles are said to be vol what is unusual

Contract sequentially out with control

11

What innervates the circular muscles

Vagus never via pharyngeal plexus

12

Where do all the circular muscles insert onto

Midline raphe

13

What muscle attaches to cricoid cartilage and where is this

Cricopharyngeus at inferior constrictor muscle

14

What are the 3 constrictor muscles

Superior
Middle
Inferior

15

What su the fascia which connects the occipital bone to the constrictor muscles

Pharyngobasilar fascia

16

What are the gaps between the pharyngeal muscles called

Gateway to the mouth

17

What passes thro the gateway to the mouth

Glossopharyngeal
Lingual artery
Stylopharyngeus muscle

18

What is the different longitudinal muscle

Stylopharyngeus
Styloid process
Passes thro gateway to the mouth with Glossopharyngeal nerve
Only muscle supplied by Glossopharyngeal

19

What are the other longitudinal muscles

Palatopjaryngeus.
Salpingopharungeus

20

What is the palatopharyngeus

Connect from soft palate

21

What is the salpingopharyngeus

Opening of auditory tube
Cartilage of pharyngotympanic tube

22

What do the longitudinal muscles do and where do they insert to

They elevate pharynx and larynx
Insert onto posterior border of thyroid cartilage and wall of pharynx

23

What cranial nevre innervates the palatopharyngeus and salpingopharyngeus

Vagus

24

What kind of cartilage is the epiglottis

Elastic

25

What is the valeculla

Depression between posterior base of tongue and epiglottis

26

What are the choana

Holes/spaces lead to nasal cav

27

What su the uvula

Dangle bit at back

28

What are the purified fossae

Spaces/depressions either side of larynx

29

What is the laryngeal inlet

Beginning of the larynx

30

What is the pharyngeal plexus

Nerve fibres derived form Glossopharyngeal and vagus sympathetic axons and parasymp
Motor mainly Vagus
Sensory mainly Glossopharyngeal

31

What is the motor innervations of the muscle of pharynx

All supplied by vagus via pharyngeal plexus except stylophafyngeus which is supplied by Glossopharyngeal

32

What innervates the mucosa

Glossopharyngeal
V2 parts in nasopharynx
Vagus laryngopharynx

33

What is the gag reflex

Protective reflex
Trees to close off oropharynx before laryngopharynx

34

What nerves are stimulated by the gag reflex

Nerve fibres of Glossopharyngeal mainly
Posterior 1/3rd of tongue
Tonsils
Walls of oropharynx

35

What are the muscles involved in the gag reflex

Constrictors of pharynx - circular
Longitudinal muscles of pharynx
Tongue and soft palate

36

What su the sequence of swallowing

Food bolus squeezed to back of mouth tongue against palate

Nasopharynx closed off, larynx elevated, pharynx enlarged to receive bolus

Pharyngeal constructors contract sequentially, epiglottis deflects bolus

Bolus moves to oes

37

What is the pharynx

Space that connects the nose and mouth above to the larynx and mouth to oes below