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Gross Anatomy Exam 4 > Larynx > Flashcards

Flashcards in Larynx Deck (57):
1

Laynx connects?

Lower part of pharynx to trachea

2

Larynx functions

1. Prevent choking
2. Vocalization

3

Lyngeal cc. connections

Cr: hyoid b.

Cd: trachea

4

4 cc. of larynx

1. Arytenoid c.
2. Thyroid c.
3. Cricoid c.
4. Epiglottic c.

5

Epiglottic c. during swallowing?

Tilts backward to partially cover opening of larynx

6

Largest c. of larynx

Thyroid c.

7

Thyroid c. is open on which side?

Dorsally

8

Oblique line of thyroid c. is insertion for?

Sternothyroideus m.

9

Cr. laryngeal n. and a. pass through?

Rostral thyroid notch

10

Which side of cricoid c. is wider?

Dorsal > ventral

11

Lamina of cricoid c.

Expanded dorsal part with median crest (for m. attachment)

12

Articular facets of cricoid c.

1. Cricoarytenoid articulation (rostral border of lamina)
2. Cricothyroid articulation (junction of lamina and arch)

13

Only paired laryngeal c.

Arytenoid c.

14

Attachments to cuneiform process

Vestibular lig. and m.

15

Attachments of vocal process

Vocal lig. and vocalis m.

16

Laryngeal cavity is divided into what 3 transverse segments?

1. Vestibule (rostral to glottis)
2. Rima glottidis (middle, narrow)
3. Infraglottic cavity (cd. to glottis)

17

Rima glottidis aka?

Glottic cleft

18

Vestibule of larynx extends from ? to ?

Laryngeal inlet to vestibular fold

19

Vestibule of larynx opens freely where?

Dorsorostrally

20

Laryngeal inlet lies?

Directly cd. to intrapharyngeal ostium

21

Borders of laryngeal inlet

Lateral: epiglottis

Cd: right and left aryeopiglottic folds

22

Vestibular fold extends from ? to ?

Cuneiform process to thyroid c.

23

Glottis consists of?

1. Arytenoid c.
2. Vocal fold

24

Narrowest part of laryngeal passageway

Rima glottidis

25

2 parts of rima glottidis

1. Intercartilagenous part
2. Intermembranous part

26

Intercartilagenous part of rima glottidis is located between?

Medial surfaces of arytenoid cc.

27

Intermembranous part of rima glottidis is located between?

Vocal folds

28

Vocal folds extend from ? to ?

Vocal process of arytenoid c. to thyroid c.

29

Vocal folds located?

Cd. to laryngeal ventricle

30

Infraglottic cavity extends from ? to ?

Glottic cleft to beginning of trachea

31

Infraglottic cavity is wide on which side?

Dorsally > narrow

32

infraglottic cavity is entirely contained within?

Cricoid c.

33

2 major ligs. of larynx

1. Cricotracheal lig.
2. Cricothyroid lig.

34

4 extrinsic mm. of larynx

1. Thyrohyoideus m.
2. Sternothyroideus m.
3. Thyropharyngeus m.
4. Cricopharyngeus m.

35

Extrinsic mm. connect?

Larynx with hyoid b., pharynx and sternum

36

Intrinsic mm. of larynx

Pass from one c. to another and move them in relation to each other

37

Function of intrinsic mm. of larynx

1. Widen and narrow glottic cleft
2. Tens and relax vocal fold

38

Cricothyroideus m. action and innervation

A: tense vocal fold

I: cr. laryngeal n.

39

Cricoarytenoideus dorsalis m. action and innervation

A: main abductor of arytenoid c.

I: cd. laryngeal n.

40

Cr. laryngeal n. only innervates?

Cricothyroideus m.

41

Cricoarytenoideus lateralis m. action and innervation

A: closes glottic cleft

I: cd. laryngeal n.

42

Thyroarytenoideus m. action and innervation

A: relax vocal fold, constrict glottis

I: cd. laryngeal n.

43

Thyroarytenoideus m. is divided into?

Ventricularis and vocalis mm.

44

Ventricularis m.

Rostral division, constricts glottis and dilates laryngeal saccule

45

Vocalis m.

Medial division, lies inside vocal fold with vocal lig. and draws arytenoid c. (to relax vocal fold)

46

Arytenoideus transversus m. action and innervation

A: constrict glottis

I: cd. laryngeal n.

47

Cd. laryngeal n. innervates?

1. Cricoarytenoideus m. (dorsalis and lateralis)
2. Thyroartenoideus m.
3. Arytenoideus transversus m.

All intrinsic mm. of larynx except cricothyroid m.

48

Blood supply of larynx

Cr. laryngeal a.

49

Cr. laryngeal a. is a drect branch from?

External carotid a.

50

Cr. laryngeal a. runs ventrally with?

Cr. laryngeal n.

51

Cr. laryngeal a. supplies?

Most of the mucosa and intrinsic mm. of larynx

52

Larynx is innervated by brahces of?

Vagus n. (cr. laryngeal and cd. laryngeal)

53

Cr. laryngeal n. leaves vagus at level of?

Distal ganglion of vagus (nodose ggl.)

54

Branches of cr. laryngeal n.

External and internal branches

55

External br. of cr. laryngeal n. innervates?

Cricothyroid m.

56

Internal b. of cr. laryngeal n. innervates?

Mucosa

57

Cd. laryngeal n. is the terminal segment of?

Recurrent laryngeal n.