Anatomy of speech and swallowing Flashcards Preview

ENT Year 2 Medicine > Anatomy of speech and swallowing > Flashcards

Flashcards in Anatomy of speech and swallowing Deck (44)
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1

What muscles of mastications are there?

Lateral and medial pterygoid
Temporalis
Masseter

2

What nerve innervates all the muscles of mastication?

Mandibular division of the trigeminal nerve
CN V3

3

What muscle tightens the labial seal?

Orbicularis oris

4

What muscles tightens the buccal cavity?

Buccinator

5

What nerve innervates both the orbiculares oris and the buccinator?

Facial muscle
CN VII

6

What cranial nerve is the facial nerve?

CN VII

7

What cranial nerve innervates the soft palate?

Vagus nerve
CN X

8

What muscle within the tongue isn't supplied by CNXII

Palatoglossal

9

What are the four muscles of the tongue?

Genioglossus
Styloglossus
Hyoglossus
Palatoglossus

10

What bones make up the hard palate?

Palatine process of the Maxilla
Horizontal plate of the Palatine

11

What lines the hard palate and why?

Keratinised squamous epithelium
Keratin is more resistant

12

What ridges are found on the hard palate and what is there function?

Palatal rugae
These ridges increase the friction on the food bolus

13

What nerve innervates the hard palate?

CN V2
Maxillary branch of the facial nerve

14

What is the name of cranial nerve XII

Hypoglossal nerve

15

What phases make up deglutition (swallowing)?

Oral - voluntarily
Pharyngeal - involuntarily
Oesophageal - involuntarily

16

Why is it key that the pharyngeal phase lasts less than 1 second?

As need to maintain the airway to breath.

17

What two muscles of the tongue create the posterior pressure.

Stylohyoid
Hypoglossus

18

What muscles cause hyolaryngeal elevation?

Suprahyoid and longitudinal pharyngeal muscles

19

Why is hyolaryngeal elevation so important in swallowing?

Forces epiglottis inferior to the tongue and covers the laryngeal aditus - protecting airway.

20

What is the upper sphincter?

Cricopharyngeus

21

What is the cricopharyngeus?

Complete circular ring around the cricoid cartilage which serves to control entry to the oesophagus.

22

What nerve innervates the cricopharyngeus?

External laryngeal - branch of the vagus
CN X

23

What nerve is responsible for the sensory innervation of the pharynx?

Glossopharyngeal
CN IX

24

What does the glossopharyngeal nerve supply sensory innervation too?

Posterior 1/3 of the tongue
Palatine tonsils
Wall of the oropharynx

25

What nerve supplies motor innervation to the walls of the pharynx leading to constriction?

Vagus CN X

26

Contraction of what muscle causes separation of the vocal folds?

Posterior cricoarytenoid

27

Contraction of the cricoarytenoid muscle causes what type of movement and what joint?

Lateral rotation at the cricoarytenoid joint.

28

Contraction of what muscles causes a narrowing but not complete closing of the vocal folds?

Oblique arytenoid

29

Contraction of what muscle causes the complete closing of the vocal folds?

Lateral cricoarytenoid

30

Contraction of this muscle tenses the vocal ligaments

Cricothyroid