Flashcards in ENT Laryngeal Anatomy Deck (21):
What is the only adjacent structure to the larynx?
Where is the larynx located?
In the Visceral Layer of the Pretracheal Fascia of the Neck
Between the C4-C6 Vertebral Levels
What structures lie close to the larynx?
At what level does the Thyroid Cartilage lie?
C5-C6 Levels, when RESTED but NOT when Swallowing
At what level does the Cricoid Cartilage lie?
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.
What are the 2 types of Vocal Cords?
True Vocal Cords (movement impacts sound)
False Vocal Cords
What is the name given to the space between the vocal cords?
What is the Vallecula?
Space between the epiglottis and tongue into which the laryngoscope is placed
All Intrinsic Muscles of the Larynx are autonomic. True/False?
They are voluntary skeletal muscle.
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
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
What are the Intrinsic Tensor Muscles of the larynx?
Attachment: Anterolateral Cricoid Cartilage
Insertion: Inferior Horn of the Thyroid Cartilage
What are the Intrinsic Relaxer Muscles of the larynx?
Attachment: Posterior Thyroid
Insertion: Anterior Arytenoid Cartilage
What are the Intrinsic Adductor Muscles of the larynx?
Lateral Cricoarytenoid Muscles and Arytenoid Muscles
What is the attachments (origins) and insertions of the Lateral Cricoarytenoid Muscles?
Attachments: Muscular Process of the Arytenoid
Insertion: Anterior Cricoid Cartilage
What is the attachments (origins) and insertions of the Arytenoid Muscles?
Attachments: One Arytenoid Cartilage
Insertion: Another Arytenoid Cartilage
What are the Intrinsic Abductor Muscles of the Larynx?
Posterior Cricoarytenoid Muscles
Attachments: Posterior Cricoid Cartilage
Insertion: Muscular Process of the Arytenoid Cartilage
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.
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