Larynx Framework ANP 4

Cartilages, Joints, Bone

Hyoid Bone

supportive structure for root of tongue

suspends larynx and serves as attachment for extrinsic laryngeal muscles

unique bone in that not attached to any other bone of skeleton

held in position by complex system of muscle and ligaments

U-shaped, level C3

Landmarks of hyoid bone?

corpus, lesser cornu, greater cornu

Thyroid cartilage is the largest?

largest laryngeal cartilage

Thyroid cartilage landmarks?

thyroid lamina-quadrilateral plates

angle of thyroid-midline fuse of lamina

superior thyroid notch-v-shaped at top of angle

superior and inferior thyroid cornu (horn), attaching to greater horn of hyoid (loosely), and cricoid cartilage

cricoid cartilage are located and form?

located immediately above upper tracheal ring

forms lower border of laryngeal framework

major landmarks of cricoid cartilage?

arch (anterior)

quadrate lamina (posterior) extends superiorly to fill space between horns of thyroid

articular facets

lateral- inferior cornu of thyroid cartilage

superior- arytenoid cartilages

arytenoid cartilages

paired cartilages on sloping border of quadrate lamina

roughly resemble three sided pyramid

landmarks of arytenoid cartilages?

muscular process posterior-lateral

vocal process-anterior

apex-superior

corniculate cartilages?

small bead-like cartilages

clearly identified in aryepiglottic folds

cuneiform cartilages?

embedded in aryepiglottic folds

help support folds and stiffen them to maintain opening to larynx

epiglottis cartilage

flexible leaf-like structure

located just behind hyoid bone and root of tongue

attached inferiorly to thyroid angle

the epiglottis is thought to prevent?

food from entering larynx during swallow

biological role of the larynx is?

protective

What are the protective role of the larynx?

prevent air from escaping lungs

prevent foreign substances from entering lungs

expel foreign substances threatening trachea

non biological role of larynx is?

sound generator