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Motor Speech Disorders Exams 1 + 2 > A + P > Flashcards

Flashcards in A + P Deck (24):
1

Intrinsic Laryngeal Muscles (5)

• Cricothyroid muscles
• Posterior cricoarytenoid muscles
• Lateral cricoarytenoid muscles
• Interarytenoid muscles
• Thyroarytenoid muscles

2

Cricothyroid muscles (Intrinsic Laryngeal Muscle) –

tenses vocal folds, changes pitch

3

Posterior cricoarytenoid muscles (Intrinsic Laryngeal Muscle) –

the only abductor (apart) of vocal folds

4

Lateral cricoarytenoid muscles (Intrinsic Laryngeal Muscle) –

adductor (together) of vocal folds

5

Interarytenoid muscles (Intrinsic Laryngeal Muscle) -

adductor (together) of vocal folds

6

Thyroarytenoid muscles (Intrinsic Laryngeal Muscle) –

makes up the body of the vocal folds, aids in medialization

7

Cricothyroid muscles (Intrinsic Laryngeal Muscle) are innervated by...

the superior laryngeal branch of vagus. All others are innervated by recurrent branch of vagus.

8

Muscles of the soft palate (4):

1. Levator veli palatini
2. Tensor palatini
3. Palatoglossus
4. Palatopharyngeus

9

Levator veli palatini (Muscle of the soft palate) –

elevates the soft palate.

10

Tensor palatini (Muscle of the soft palate) –

tenses soft palate which may aid in V-P closure.

11

Palatoglossus (Muscle of the soft palate) –

forms the anterior faucial pillars – contraction of this muscle can either lower the soft palate or raise the back of the tongue (also considered a tongue muscle).

12

Palatopharyngeus (Muscle of the soft palate) –

forms the posterior faucial pillars – contraction can either depress the soft palate or elevate the pharynx and larynx for swallowing.

13

Extrinsic muscles of the tongue (4):

• Styloglossus – pulls tongue back and up for sounds like /u/ in “Sue”.

• Hyoglossus – depresses tongue and pulls it backward for sounds like /a/.

• Genioglossus – pulls tongue up and to front for sounds like /i/ in “see”. Also is responsible for sticking out the tongue.

• Palatoglossus – (also called glossopalatine) its contraction can either lower the soft palate or elevate the sides and back of tongue.

14

Styloglossus (Extrinsic muscle of the tongue) -

pulls tongue back and up for sounds like /u/ in “Sue”.

15

Hyoglossus (Extrinsic muscle of the tongue)–

depresses tongue and pulls it backward for sounds like /a/.

16

Genioglossus (Extrinsic muscle of the tongue)–

pulls tongue up and to front for sounds like /i/ in “see”. Also is responsible for sticking out the tongue.

17

Palatoglossus (also called glossopalatine) (Extrinsic muscle of the tongue) -

its contraction can either lower the soft palate or elevate the sides and back of tongue.

18

Intrinsic muscles of the tongue (4):

1. Superior longitudinal muscle
2. Inferior longitudinal muscle
3. Transverse muscle
4. Vertical muscle

19

Superior longitudinal muscle (Intrinsic muscle of the tongue) –

runs from back of tongue to tip of tongue superiorally, curls tongue tip up.

20

Inferior longitudinal muscle (Intrinsic muscle of the tongue) –

runs from back of tongue to tip of tongue inferiorally, depresses tongue tip.

21

Transverse muscle(Intrinsic muscle of the tongue) –

runs from middle of tongue to sides, changes tongue configuration in a variety of ways.

22

Vertical muscle (Intrinsic muscle of the tongue) –

runs from top to bottom of tongue, changes tongue configuration in a variety of ways.

23

What do extrinsic muscles of the tongue do?

determine the gross/base position of the tongue and act to protrude, elevate, and retract the tongue as well as moving it from side to side.

24

What do intrinsic muscles of the tongue do?

determine the surface shape of the tongue.