Larynx Flashcards

1
Q

What is the laryngopharynx?

A

The region of the pharynx from the epiglottis to the oesophagus

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2
Q

Where is the larynx?

A

Anterior to the laryngopharynx Between the carotid sheath structures

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3
Q

At which vertebral level is the larynx?

A

Between C4 and C6

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4
Q

At which vertebral level is the hyoid bone?

A

C3

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5
Q

At which level does the larynx become the trachea?

A

C6

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6
Q

What are the features of the skeleton of the larynx?

A

Epiglottis (elastic) Thyroid cartilage (hyaline) Cricoid cartilage (hyaline) 2x arytenoid cartilage (hyaline)

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7
Q

Which part of the skeleton of the larynx is the only complete ring?

A

The thin arch of the cricoid cartilage

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8
Q

What structure completes the posterior wall of the trachea?

A

Skeletal muscle - trachealis

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9
Q

What is the name of the membrane between the hyoid bone and the thyroid cartilage?

A

Thyrohyoid membrane

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10
Q

What is the name of the membrane between the cricoid cartilage and the thyroid cartilage and what is it’s clinical significance?

A

Cricothyroid membrane Access point for cricothyroid puncture in an emergency

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11
Q

Which structure is being indicated here?

A

Thyroid cartilidge

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12
Q

Which structure is being shown here?

A

Thyrohyoid membrane

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13
Q

Which structure is being shown here?

A

Right carotid sheath

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14
Q

Which structure is being shown here?

A

Laryngeal inlet

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15
Q

Which structure is being shown here?

A

Vallecula

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16
Q

Which kind of epithelium lines the larynx?

A

Respiratory mucosa

(Apart from the vocal chords)

17
Q

Which kind of epithelium lines the vocal chords?

A

Stratified squamous epithelium

18
Q

Which stuctures are being indicated here?

A

Vestibular folds

19
Q

Which structures are being indicated here?

A

Vocal folds

20
Q

What is the mucosal sensory nerve supply to the larynx superior to the vocal folds?

A

Superior laryngeal branches of the vagus nerve

21
Q

What is the mucosal sensory nerve supply to the larnyx including and inferior to the vocal folds?

A

Recurrent laryngeal branches of the vagus nerve

22
Q

Which structures are being indicated here and which nerve is this?

A

Vagus nerve

23
Q

Which structure is being indicated here?

A

Vocal ligaments

24
Q

Which structures are the vocal ligaments attached to?

A

Midline of the thyroid cartilage

Vocal processes of the arytenoid cartilages

25
Q

What movement affects the tension of the vocal ligaments?

A

The tilt of the cricoid cartilage

26
Q

Which movement affects the gap between the vocal ligaments?

A

The rotation of the arytenoid cartilage

27
Q

What is the narrowest point of the larynx?

A

Rima glottidis

28
Q

What happens to the rima glottidis when speaking?

A

Narrows to a slit

29
Q

What shape is the rima glottidis during quiet breathing?

A

Diamond shaped

30
Q

Which structure is being shown here?

A

Cricothyroid muscle

31
Q

Which movement does the cricothyroid muscle allow?

A

Pulls the arch of the cricoid cartilage upwards

32
Q

What effect does contraction of the cricothyroid muscle have on the vocal chords?

A

Pushes the arytenoid cartilages backwards, making the vocal chords longer and tighter, narrowing the rima glottidis

33
Q

What movement does the posterior cricoarytenoid muscle allow?

A

Rotation of the arytenoid cartilage, widening the vocal opening

34
Q

What movement does the lateral cricoarytenoid muscle allow?

A

Pulls the arytenoid cartilage anteriorly and laterally, pulling the vocal chords towards the midline

35
Q

Which two muscles act to shorten and narrow the vocal opening?

A

Thyroarytenoid

Transverse arytenoid

36
Q

Which muscle is being shown here?

A

Thyroarytenoid

37
Q

Which muscle is being shown here?

A

Transverse arytenoid