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Anatomy > Muscles of the Larynx > Flashcards

Muscles of the Larynx Flashcards

1
Q

What are the muscles of the Larynx?

A

Extrinsic (infrahyoid are depressors (low pitch) of hyoid bone and larynx, suprahyoid muscles are elevators (high pitch) of hyoid bone and larynx), and Intrinsic (Transverse Arytenoid, Oblique Arytenoid, Lateral Cricoarytenoid, Posterior Cricoarytenoid, Cricothyroid, Thyroarytenoid, Vocalis) muscles

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2
Q

What is the origin of the Transverse Arytenoid muscle?

A

arytenoid cartilage

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3
Q

What is the insertion of the Transverse Arytenoid muscle?

A

contralateral arytenoid cartilage

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4
Q

What is the innervation of the Transverse Arytenoid muscle?

A

recurrent laryngeal nerve

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5
Q

What is the action of the Transverse Arytenoid muscle?

A

close laryngeal inlet, only unpaired muscle

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6
Q

What is the origin of the Oblique Arytenoid muscle?

A

muscular process of arytenoid cartilage

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7
Q

What is the insertion of the Oblique Arytenoid muscle?

A

contralateral arytenoid cartilage

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8
Q

What is the innervation of the Oblique Arytenoid muscle?

A

recurrent laryngeal nerve

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9
Q

What is the blood supply of the Oblique Arytenoid muscle?

A

laryngeal branch of superior thyroid artery

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10
Q

What is the action of the Oblique Arytenoid muscle?

A

close laryngeal inlet

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11
Q

What is the origin of the Lateral Cricoarytenoid muscle?

A

arch of cricoid cartilage

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12
Q

What is the insertion of the Lateral Cricoarytenoid muscle?

A

muscular process of arytenoid cartilage

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13
Q

What is the innervation of the Lateral Cricoarytenoid muscle?

A

recurrent laryngeal nerve

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14
Q

What is the blood supply of the Lateral Cricoarytenoid muscle?

A

superior laryngeal artery

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15
Q

What is the action of the Lateral Cricoarytenoid muscle?

A

adduct the vocal cords

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16
Q

What is noteworthy about the Lateral Cricoarytenoid muscle?

A

reinforced by transvers arytenoid muscle

17
Q

What is the origin of the Posterior Cricoarytenoid muscle?

A

lamina of cricoid cartilage

18
Q

What is the insertion of the Posterior Cricoarytenoid muscle?

A

muscular process of arytenoid cartilage

19
Q

What is the innervation of the Posterior Cricoarytenoid muscle?

A

recurrent laryngeal nerve

20
Q

What is the blood supply of the Posterior Cricoarytenoid muscle?

A

superior laryngeal artery

21
Q

What is the action of the Posterior Cricoarytenoid muscle?

A

abduct the vocal cords

22
Q

What is noteworthy about the Posterior Cricoarytenoid muscle?

A

only ABductor of vocal cords

23
Q

What is the origin of the Cricothyroid muscle?

A

arch of cricoid cartilage

24
Q

What is the insertion of the Cricothyroid muscle?

A

thyroid cartilage

25
Q

What is the innervation of the Cricothyroid muscle?

A

external laryngeal nerve

26
Q

What is the blood supply of the Cricothyroid muscle?

A

cricothyroid branch of superior thyroid artery

27
Q

What is the action of the Cricothyroid muscle?

A

tense vocal cords

28
Q

What is noteworthy about the Cricothyroid muscle?

A

only intrinsic muscle of larynx not supplied by recurrent laryngeal nerve

29
Q

What is the origin of the Thyroarytenoid muscle?

A

inner surface of thyroid cartilage

30
Q

What is the insertion of the Thyroarytenoid muscle?

A

lateral border of arytenoid cartilage

31
Q

What is the innervation of the Thyroarytenoid muscle?

A

recurrent laryngeal nerve

32
Q

What is the blood supply of the Thyroarytenoid muscle?

A

branch of the superior thyroid artery

33
Q

What is the action of the Thyroarytenoid muscle?

A

relax vocal cords

34
Q

What is the origin of the Vocalis muscle?

A

thyroid cartilage, arytenoid cartilage

35
Q

What is the insertion of the Vocalis muscle?

A

vocal ligament

36
Q

What is the innervation of the Vocalis muscle?

A

recurrent laryngeal nerve

37
Q

What is the blood supply of the Vocalis muscle?

A

laryngeal branch of superior thyroid artery

38
Q

What is the action of the Vocalis muscle?

A

relaxes segments of vocal ligament, adjusting pitch

Anatomy (17 decks)

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