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Anatomy Week 14 BT > Regions of Larynx > Flashcards

Regions of Larynx Flashcards

1
Q

What regions of the Larynx are innervated by the INTERNAL branch of SUPERIOR Laryngeal n. (branch of CN X)?

A
  • Inlet
  • Vestibule
  • Ventricle and Saccule
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2
Q

What structures/Spaces are present in the Laryngeal Inlet?

A
  1. Mucosa over the Epiglottis
  2. Aryepiglottic Fold
  3. Mucosa of Interarytenoid Notch
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3
Q

What structures/Spaces are present in the Vestibule of the Larynx?

A
  1. Mucosa over the Quadrangular membrane

2. Vestibular Fold

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4
Q

What structures/Space are present in the Ventricle and Saccule of the Larynx?

A
  1. Mucosa Lining the Ventricle Sacculus
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5
Q

What structures/Spaces are present in the Infraglottic space?

A
  1. Mucosa over the conus elasticus (BELOW the TRUE vocal folds)
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6
Q

What innervates the infraglottic space?

A

CN X via INFERIOR laryngeal n.

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7
Q

What is the Origin and Insertion of the Cricothyroid muscle?

A

Origin:
Anterior and Lateral Aspects of the Arch of the Cricoid Cartilage

Insertion:
Inferior Margin and Inferior horn of thryoid cartilage

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8
Q

What is the Origin and Insertion of the Posterior Cricoarytenoid?

A

Origin:
Posterior Surface of Lamina of Cricoid Cartilage

Insertion:
Muscular Process of Arytenoid Cartilage

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9
Q

What is the Origin and Insertion of the Lateral Crico-arytenoid muscle?

A

Origin:
Superior Border of Arch of Cricoid Cartilage

Insertion:
Muscular Process of Arytenoid Cartilage

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10
Q

What is the Origin and Insertion of the Thyroarytenoid muscle?

A

Origin:
Posterior surface of thyroid cartilage at midline angle

Insertion:
Anterolateral Border and vocal process of arytenoid cartilage

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11
Q

What is the Origin and Insertion of the Transverse and Oblique Artenoid Muscles?

A

Origin:
One Arytenoid Cartilage

Insertion:
Opposite arytenoid cartilage

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12
Q

What is the Origin and Insertion of the Vocalis Muscle?

A

Origin:
Vocal Process of Arytenoid Cartilage

Insertion:
Vocal Ligaments

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13
Q

What is the innervation of the Cricothyroid muscle?

A

EXTERNAL branch of SUPERIOR Laryngeal n.

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14
Q

What muscles of the Larynx are innervated by the Inferior Laryngeal N.?

A
  • Posterior Cricoartenoid
  • Lateral Cricoarytenoid
  • Thryoartenoid
  • Transverse and Oblique arytenoid
  • Vocalis
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15
Q

What is the action and innervation of the vocalis muscle?

A
  • Fine Tunes Tension of Vocal Ligament
  • Affects PITCH of the voice

*Innervation = Inferior laryngeal n.

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16
Q

What is the action and innervation of the Transverse and obilque arytenoid m.?

A
  • Closes intercartilaginous portion of rima glottidis
  • IMPORTANT FOR COUGHING

*Innervation = Inferior Laryngeal n.

17
Q

What is the action and innervation of the Thyroartenoid m.?

A
  • Relaxes Vocal Fold
  • LOWERS pitch of the voice

*Innervation = Inferior Laryngeal n.

18
Q

What is the action and innervation of the Lateral Cricoarytenoid?

A
  • ADducts vocal Fold
  • CLOSES airway partially or completely depending upon the action of other muscles

*Innervation = Inferior Laryngeal n.

19
Q

What is the action and innervation of the Posterior Cricoarytenoid?

A
  • ABducts vocal Fold
  • OPENS airway more to facilitate breathing

*Innervation = Inferiro Laryngeal n.

20
Q

What is the action and innervation of the Cricothyroid Muscle?

A
  • Stretches Vocal Fold
  • RAISES Pitch of the voice

*Innervation = EXternal branch of SUPERIOR Laryngeal n.

21
Q

What is the relationship between the action of the Cricothyroid and Thyroarytenoid Muscle?

A

*Opposing Effects on the Voice

  • Cricothyroid: RAISES the pitch of the voice
  • Thyroarytenoid: LOWERs the pitch of the voice
22
Q

What is the relationship between the action of the Lateral and Posterior Cricoarytenoid Muscles?

A
  • Opposing Effects on AIRWAY

Posterior Cricoarytenoid:
- ABducts Vocal fold to OPEN Airway

Lateral Arytenoid:
- ADducts Vocal Fold to CLOSE Airway (partially of completely)

23
Q

What muscle is important when your are coughing?

A
  • Transverse and Oblique Arytenoid

Anatomy Week 14 BT (6 decks)

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