HEAD & NECK: Laryngeal muscles

Question 1

INTRINSIC MUSCLES

Cricothyroid - origin

Answer 1

Anterolateral part of cricoid cartilage

Question 2

INTRINSIC MUSCLES

Cricothyroid [Oblique part] - insertion

Answer 2

Inferior horn of thyroid cartilage

Question 3

INTRINSIC MUSCLES

Cricothyroid [Straight part] - insertion

Answer 3

Inferior margin of thyroid cartilage

Question 4

INTRINSIC MUSCLES

Cricothyroid - innervation

Answer 4

External laryngeal nerve (of superior laryngeal nerve (CN X))

Question 5

INTRINSIC MUSCLES

Cricothyroid - function

Answer 5

Draws thyroid cartilage anteroinferiorly, Lengthens and tenses vocal ligament (for high pitch sound)

Question 6

INTRINSIC MUSCLES

Posterior cricoarytenoid - origin

Answer 6

Posterior surface of cricoid lamina

Question 7

INTRINSIC MUSCLES

Posterior cricoarytenoid - insertion

Answer 7

Muscular process of arytenoid cartilage

Question 8

INTRINSIC MUSCLES

Posterior cricoarytenoid - innervation

Answer 8

Inferior laryngeal nerve (of recurrent laryngeal nerve (CN X))

Question 9

INTRINSIC MUSCLES

Posterior cricoarytenoid - function

Answer 9

Abducts and lengthens vocal folds, Opens glottis

Question 10

INTRINSIC MUSCLES

Lateral cricoarytenoid - origin

Answer 10

Arch of cricoid cartilage

Question 11

INTRINSIC MUSCLES

Lateral cricoarytenoid - insertion

Answer 11

Muscular process of arytenoid cartilage

Question 12

INTRINSIC MUSCLES

Lateral cricoarytenoid - innervation

Answer 12

Inferior laryngeal nerve (of recurrent laryngeal nerve (CN X))

Question 13

INTRINSIC MUSCLES

Lateral cricoarytenoid - function

Answer 13

Adducts and shortens vocal folds

Question 14

INTRINSIC MUSCLES

Transverse arytenoid - origin

Answer 14

Lateral border and muscular process of arytenoid cartilage

Question 15

INTRINSIC MUSCLES

Transverse arytenoid - insertion

Answer 15

Lateral border of muscular process of opposite arytenoid cartilage

Question 16

INTRINSIC MUSCLES

Transverse arytenoid - innervation

Answer 16

Inferior laryngeal nerve (of recurrent laryngeal nerve (CN X))

Question 17

INTRINSIC MUSCLES

Transverse arytenoid - function

Answer 17

Adducts arytenoid cartilages, Acts as a sphincter on laryngeal inlet

Question 18

INTRINSIC MUSCLES

Oblique arytenoid - origin

Answer 18

Muscular process of arytenoid cartilage

Question 19

INTRINSIC MUSCLES

Oblique arytenoid - insertion

Answer 19

Apex of contralateral arytenoid cartilage

Question 20

INTRINSIC MUSCLES

Oblique arytenoid - innervation

Answer 20

Inferior laryngeal nerve (of recurrent laryngeal nerve (CN X))

Question 21

INTRINSIC MUSCLES

Oblique arytenoid - function

Answer 21

Adducts arytenoid cartilages, Acts as a sphincter on laryngeal inlet

Question 22

INTRINSIC MUSCLES

Aryepiglottic muscle - origin

Answer 22

Muscular process of arytenoid cartilage

Question 23

INTRINSIC MUSCLES

Aryepiglottic muscle - insertion

Answer 23

Aryepiglottic fold, Lateral border of epiglottis

Question 24

INTRINSIC MUSCLES

Aryepiglottic muscle - innervation

Answer 24

Inferior laryngeal nerve (of recurrent laryngeal nerve (CN X))

Question 25

INTRINSIC MUSCLES Aryepiglottic muscle - function

Answer 25

Adducts arytenoid cartilages, Acts as a sphincter on laryngeal inlet

Question 26

INTRINSIC MUSCLES Thyroarytenoid - origin

Answer 26

Angle of thyroid cartilage and adjacent cricothyroid ligament

Question 27

INTRINSIC MUSCLES Thyroarytenoid - insertion

Answer 27

Anterolateral surface of arytenoid cartilage

Question 28

INTRINSIC MUSCLES Thyroarytenoid - innervation

Answer 28

Inferior laryngeal nerve (of recurrent laryngeal nerve (CN X))

Question 29

INTRINSIC MUSCLES Thyroarytenoid - function

Answer 29

Draws arytenoid cartilages anteriorly, Relaxes vocal ligament (for low pitch sound)

Question 30

INTRINSIC MUSCLES Vocalis - origin

Answer 30

Lateral surface of vocal processes of arytenoid cartilage

Question 31

INTRINSIC MUSCLES Vocalis - insertion

Answer 31

Ipsilateral vocal ligament

Question 32

INTRINSIC MUSCLES Vocalis - innervation

Answer 32

Inferior laryngeal nerve (of recurrent laryngeal nerve (CN X))

Question 33

INTRINSIC MUSCLES Vocalis - function

Answer 33

Relaxes posterior vocal ligament, Maintains tension of anterior vocal ligament

Question 34

INTRINSIC MUSCLES Thyroepiglottic muscle - origin

Answer 34

Angle of thyroid cartilage

Question 35

INTRINSIC MUSCLES Thyroepiglottic muscle - insertion

Answer 35

Lateral aspect of epiglottis

Question 36

INTRINSIC MUSCLES Thyroepiglottic muscle - innervation

Answer 36

Inferior laryngeal nerve (of recurrent laryngeal nerve (CN X))

Question 37

INTRINSIC MUSCLES Thyroepiglottic muscle - function

Answer 37

Widens laryngeal inlet