Q21

Media: Airway model.

On the model, identify the structures of the larynx.

  • Cartilages – thyroid (20), cricoid, epiglottis (54), (arytenoids, corniculate, cuneiform)
  • Ligaments – cricothyroid membrane (23), thyrohyoid (21, 22), vocal cords (60)
  • Muscles – cricothyroid muscle (80), cricoarytenoid muscle
  • Spaces and folds – vallecula, aryepiglottic folds (57), piriform recess

Pass Criteria:

  • 5 of 6 bold plus 2 others to pass.

What is the innervation of the larynx?

  • Cranial nerve X (Vagus)
  • Inferior laryngeal nerve
  • Terminal branch of Recurrent laryngeal nerve
    • These supply all intrinsic muscles of the larynx except for the cricothyroid muscle, sensory below cords
  • External laryngeal supplies the cricothyroid muscle
  • Internal laryngeal nerve – sensory above cords
  • (Internal and external laryngeal nerves are both branches of the superior laryngeal nerve)

Pass Criteria:

  • Bold with details of one to pass.

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