00:00Here are the cartilages in the neck. They're very superficial, you can palpate them.
00:04There's the thyroid cartilage, the cricoid cartilage is in there, and there's the trachea.
00:09The hyoid bone is up there. Here they are again. Thyroid cartilage, hyoid bone. So
00:16where are the vocal cords? There are the vocal cords. They're strung between the
00:21thyroid cartilage and the arytenoid cartilage is back here. And the vocal
00:26cords move so that when they're wide apart you breathe, when they're close
00:30together you phonate, you make sound, and when they're close together you hold
00:34your breath, which is great for coughing and sneezing. These muscles back here
00:38move the cartilages that move the vocal cords. They're innervated by the
00:42recurrent laryngeal nerve, which is a branch of the vagus nerve that comes
00:46from the chest on either side. If this nerve gets injured your voice will be
00:51hoarse and never quite the same again.
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