I’m working on a Anatomy exercise and need support.
1. Cut around the thick outlines of the thyroid cartilage and the cricoid cartilage, the two arytenoids and the epiglottis.
2. Fold along the dotted lines
4. Glue the cricoid cartilage to make a complete ‘ring’ (glue one A on top of the other). The letters should be on the outside of the ring.
5. Glue the first arytenoid cartilage to form a three-sided pyramid (glue face D on top of the other face D). Leave the rectangular flap at the bottom free.
6. Repeat with the other arytenoids cartilage, gluing face E on top of the other face E.
Building the larynx with the paper fasteners
Arytenoid cartilages to Cricoid cartilage
7. Join the first arytenoid cartilage onto the cricoid cartilage, using a paper fastener. Line the F flap up on the outside of the cricoid ‘ring’, with the arytenoid pyramid overhanging inside. Then secure with a paper fastener, pushing through flap F on the arytenoids cartilage and point F on the cricoid cartilage, and opening the fastener up inside the ring to secure it.
8. Repeat with the second arytenoid and paper fastener, lining up the G flap with point G on the cricoid ‘ring’. Both pyramids should overhang inside the ring and above it.
Cricoid cartilage to Thyroid cartilage
9. Join the thyroid cartilage to the cricoid cartilage, using the remaining two paper fasteners. Line up point B on the thyroid cartilage to point B on the cricoid cartilage. The thyroid should be outside the cricoid ‘ring’ with the long arms pointing up above the arytenoids. Push the paper fastener through point B on the thyroid cartilage, and on point B of the cricoid ‘ring’.
10. Repeat with point C on the thyroid cartilage. The thyroid cartilage should sit outside the cricoid ‘ring’.
Epiglottis to Thyroid cartilage
11. The narrow tip of the epiglottis glues onto the inside of the thyroid cartilage, approximately two thirds of the way down.
© 2009 Jeremy Fisher for Vocal Process.
Attaching the following laryngeal muscles to the model (using the pink paper):
PCA, TA, CT, LCA, IA
Rubber bands represent the vocal folds (Vocalis/TA)
Larynx Model Rubric
1. Five muscles: cricothyroid (CT), lateral cricoarytenoid (LCA), posterior cricoarytenoid (PCA), oblique and transverse interaytenoid (IA), and thyroarytenoid (TA) muscles
2. Vocal folds (TA muscle) course from the anterior commissure to the vocal processes of the arytenoids. V shape!
3. Both the lateral cricoarytenoid and posterior cricoarytenoid muscles are attached to the muscular processes of the arytenoids.
4. The transverse interarytenoid muscle runs horizontally across the posterior portion of the two arytenoid cartilages. The oblique interarytenoid muscle runs from the base of one arytenoid to the apex of the other arytenoid.
5. The cricothyroid joints are located between each inferior horn of the thyroid and the sides of the cricoid cartilage.
6. The cricoarytenoid joints are formed by the articulation between the base of each arytenoid and the superior surface of the cricoid.