Top Banner
TO REVIEW
30

TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

Jan 04, 2016

Download

Documents

Joseph Marshall
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Page 1: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

TO REVIEW

Page 2: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

SKELETAL STRUCTURE OF LARYNX

6 Cartilages: Cricoid ThyroidArytenoidCorniculateCuneiformEpiglottic

1 Bone:Hyoid

Basic Structure/Layers of Vocal Folds:EpitheliumLamina PropriaThyroarytenoid (Vocalis) Muscle

Page 3: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.
Page 4: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.
Page 5: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.
Page 6: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.
Page 7: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

Cricoid Cartilage (Anterior)

Page 8: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

Thyroid Cartilage (Anterior)

Page 9: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

Arytenoid, Corniculate, and Cuneiform Cartilages

Page 10: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

Epiglottic Cartilage (Anterior, then Sagittal)

Page 11: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

Hyoid Bone (Anterior)

Page 12: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.
Page 13: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.
Page 14: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.
Page 15: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

MOVING ON....

Page 16: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

INTRINSIC LARYNGEAL MUSCLES: All Paired

Arytenoid MusclesInterarytenoids (transverse, oblique)

Thyroarytenoid MusclesCricoarytenoid Muscles (posterior, lateral)Cricothyroid Muscles

Page 17: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

INTRINSIC LARYNGEAL MUSCLES: All inervated by recurrent laryngeal nerveExcept: Cricothyroids invervated by external

branch of superior laryngeal nerve

Page 18: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.
Page 19: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

Intrinsic Muscles Anterior-Superior View Intrinsic Muscles Posterior-Superior View

Page 20: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.
Page 21: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.
Page 22: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

INTRINSIC MUSCLES: OPENING & CLOSING THE FOLDS

Page 23: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

INTRINSIC MUSCLES: CLOSERS/ADDUCTORS

Lateral Cricoarytenoids (LCA)Interarytenoids (IA)

TransverseOblique

Page 24: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

INTRINSIC MUSCLES: OPENERS/ABDUCTORSPosterior Cricoarytenoids (PCA)

Pull the arytenoids laterally to open the glottis

Page 25: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

INTRINSIC MUSCLES: LENGTHENING AND SHORTENING THE FOLDS

Page 26: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

INTRINSIC MUSCLES: LENGTHENERS/THINNING

Page 27: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

Pitch/Frequency of voiced sounds is largely controlled by varying the length of the vocal folds. As the folds are lengthened, their mass per unit length is reduced. Consequently, they vibrate faster when lengthened.

The vocal folds are attached to the thyroid cartilage at the front and the arytenoid cartilage at the back. The arytenoid cartilage, however, rides on the cricoid cartilage. So the length of the folds is mainly achieved by using the Cricothyroid (CT) Muscles, which rock the cricoid cartilage backward and upward, causing rotational movement of the thyroid cartilage (moving it slightly forward and tipping its front end downward). The cricothyroid muscles also pull the arytenoid cartilages slightly backwards, as they ride on the cricoid cartilage. These movements enabled by the cricothyroid muscles both lengthen and thin the vocal folds.

INTRINSIC MUSCLES: LENGTHENERS/THINNING

Page 28: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

INTRINSIC MUSCLES: SHORTENERS/THICKENING

Shortening of the vocal folds occurs when the thyroarytenoid muscles (TA) contracts. When the thyroarytenoid muscles are not opposed by the thyrocricoid muscles (the lengtheners), they exert a shortening-thickening-laxing influence on the vocal fold cover tissues.

Page 29: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

IMPORTANT TO REMEMBER:The Lengtheners/Shorteners and Openers/Closers all work in constant relationship to each other.

TO RECAP:

Openers/Abductors: PCACloser/Adductors: LCA & IALengtheners: CTShorteners: TA

Page 30: TO REVIEW. SKELETAL STRUCTURE OF LARYNX 6 Cartilages: Cricoid Thyroid Arytenoid Corniculate Cuneiform Epiglottic 1 Bone: Hyoid Basic Structure/Layers.

http://getbodysmart.com/ap/respiratorysystem/larynx/menu/animation.html