ENT Laryngeal Anatomy Flashcards Preview

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Flashcards in ENT Laryngeal Anatomy Deck (21):
1

What is the only adjacent structure to the larynx?

Hyoid Bone

2

Where is the larynx located?

In the Visceral Layer of the Pretracheal Fascia of the Neck

Between the C4-C6 Vertebral Levels

3

What structures lie close to the larynx?

Thyroid cartilage
Cricoid cartilage
Arytenoid cartilage
Cricoarytenoid joint
Epiglottis

4

At what level does the Thyroid Cartilage lie?

C5-C6 Levels, when RESTED but NOT when Swallowing

5

At what level does the Cricoid Cartilage lie?

C6

6

What is the Sellick Manoeuvre?

Technique used in Endotracheal Intubation to Try and Reduce the Risk of Regurgitation by pressing on Cricoid Cartilage to keep airway open but shut oesophagus.

7

What are the 2 types of Vocal Cords?

True Vocal Cords (movement impacts sound)

False Vocal Cords

8

What is the name given to the space between the vocal cords?

Rima Glottidis

9

What is the Vallecula?

Space between the epiglottis and tongue into which the laryngoscope is placed

10

All Intrinsic Muscles of the Larynx are autonomic. True/False?

False.
They are voluntary skeletal muscle.

11

How do the intrinsic muscle movements affect the voice?

Tension = Increases the Pitch of the Voice

Relaxation = Decreases the Pitch of the Voice

Adduction = Narrows the Rima Glottidis, Quietens the Voice

Abduction = Widens the Rima Glottidis, Loudens the Voice

12

What is the innervation of all the intrinsic larynx muscles?

Inferior Laryngeal Nerve = Branch of the Recurrent Laryngeal Nerve of CN X

NOTE THAT CRICOTHYROID IS INNERVATED BY THE SUPERIOR LARYNGEAL NERVE OF CN X

13

What are the Intrinsic Tensor Muscles of the larynx?

Cricothyroid Muscles

Attachment: Anterolateral Cricoid Cartilage

Insertion: Inferior Horn of the Thyroid Cartilage

14

What are the Intrinsic Relaxer Muscles of the larynx?

Thyroarytenoid Muscles

Attachment: Posterior Thyroid

Insertion: Anterior Arytenoid Cartilage

15

What are the Intrinsic Adductor Muscles of the larynx?

Lateral Cricoarytenoid Muscles and Arytenoid Muscles

16

What is the attachments (origins) and insertions of the Lateral Cricoarytenoid Muscles?

Attachments: Muscular Process of the Arytenoid

Insertion: Anterior Cricoid Cartilage

17

What is the attachments (origins) and insertions of the Arytenoid Muscles?

Attachments: One Arytenoid Cartilage

Insertion: Another Arytenoid Cartilage

18

What are the Intrinsic Abductor Muscles of the Larynx?

Posterior Cricoarytenoid Muscles

Attachments: Posterior Cricoid Cartilage

Insertion: Muscular Process of the Arytenoid Cartilage

19

What is the spread of the Glottal Tumours?

Supraglottal Tumours drain into the Superior, Deep Cervical Lymph Nodes.

Glottic Tumours present on the Vocal Cords, causing Symptoms of Voice Changes or Airway Obstruction.

Subglottal Tumours spread to the Paratracheal Lymph Nodes and Present with Voice or Airway Obstruction.

20

What is the mucosal innervation of the larynx?

Mucosa ABOVE the Vocal Folds is Supplied by the INTERNAL Laryngeal Nerve (Name Change from the Inferior Laryngeal Nerve i.e. ABOVE the Folds, it is Internal but BELOW the Folds, it is Inferior)

Mucosa BELOW the Vocal Folds is Supplied by the Inferior Laryngeal Nerve

21

Why are men's voices higher than women's voices?

Due to the their Thicker Vocal Cords

Voices get Higher in Old Age due to Atrophy of the Vocal Cords.