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Thought, Sense and Movement > Larynx > Flashcards

Larynx Flashcards

1
Q

What is the action of the suprahyoid muscles?

A

Elevate the hyoid and larynx

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2
Q

What is the action of infrahyoid muscles?

A

Depress the hyoid and larynx

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3
Q

Name the four Infrahyoid extrinsic muscles of the larynx?

A

Omohyoid
Sternohyoid
Sternothyroid
Thyrohyoid

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4
Q

Which intrinsic muscle depresses the hyoid bone and elevates the larynx?

A

Thryohyoid

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5
Q

Name the four suprahyoid extrinsic muscles of the larynx?

A

Mylohyoid
Geniohyoid
Stylohyoid
Digastric

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6
Q

Inside the larynx a synovial joint occurs between which two structures?

A

Inferior cornu of thyroid cartilage

Cricoid cartilage

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7
Q

Which type of cartilage makes up the cartilaginous structures of the larynx? What is the exception to this?

A

Hyaline

Epiglottis - elastic cartilage

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8
Q

Which structure extends downwards and attaches onto the vestibular ligaments?

A

Quadrangular membrane

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9
Q

The space above the two vocal ligaments is known as?

A

Supraglottic/vestibule cavity

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10
Q

The space below the two vocal ligaments is known as?

A

Infraglottic cavity

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11
Q

Name the recess formed between the cricoid cartilage and the thyroid?

A

Piriform fossa

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12
Q

Name the space between the lingual tonsil (back of the tongue) and epiglottis?

A

Vallecula space

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13
Q

Name the space between the two vocal ligaments?

A

Rima glottis

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14
Q

Name the six intrinsic muscles of the larynx? What is their innervation?

A 
Posterior cricoarytenoid - CN X (RLB)
Inter-arytenoids- CN X (RLB)
Lateral cricoarytenoid- CN X (RLB)
Thyroarytenoid- CN X (RLB)
Vocalis- CN X (RLB)
Cricothyroid- CN X (SLB - external)
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15
Q

What is the function of cricothyroid?

A

Increases the tension of the vocal cords (increased pitch)

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16
Q

What is the function of vocalis?

A

Fine adjustments to the vocal ligaments

17
Q

What is the function of thyroarytenoid?

A

Slackening of vocal cord (decreased pitch)

18
Q

What is the function of lateral cricoarytenoid?

A

Adduct the vocal ligaments

19
Q

What is the function of inter-arytenoid?

A

Adduct the vocal ligaments

20
Q

What is the function of posterior cricoarytenoid?

A

ABduct the vocal ligaments - open the vocal folds

21
Q

Name the two branches of CN X - Vagus?

A

Recurrent laryngeal branch

Superior laryngeal branch (internal and external)

22
Q

What does the recurrent laryngeal branch innervate?

A

All the intrinsic muscles of the larynx except for cricothryoid
It is sensory to the infraglotic cavity

23
Q

What innervates cricothyroid?

A

External superior laryngeal branch of vagus

It is also sensory to the supraglotic/vestibule cavity

24
Q

What passes through the aperture on the thyrohyoid membrane?

A

Internal superior laryngeal branch of vagus

Thought, Sense and Movement (32 decks)

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