Phonatory System Anatomy- Laryngeal Joints

what are the laryngeal joints?

more of a muscle action

-move vfs together or apart

or change shape of vfs- long/thin vs short/thick

Where is the Circoartyenoid joint located?

joint between: cricoid and arytenoid

What does the Cricoarytenoid joint allow for?

allows for Arytenoids to move in complex rocking and sliding motion relative to cricoid

What complex movements does the Cricoarytenoid joint allow?

allows for Arytenoids to move in complex rocking and sliding motion relative to cricoid SOOOO...

abduction= movement vfs from midline

adduction= movement of vfs toward midline. Different from vibration- allows for voice sounds and vfs closure swalloing

Where is the cricothyroid joint located

between cricoid and thyroid

What complex movement does the cricothyroid joint allow

cricoid and thyroid: move in two complex rotation and sliding movements relative to each other

What is movement 1 of the cricothyroid

distance between thyroid and cricoid and thus arytenoid increases.

What we see: long, thin, stiffened vfs

what we hear: high pitched voiced sound (left side in pic)

What is movement 2 of the cricothyroid

distance between thyroid and cricoid..and thus, arytenoids decreases

What we see is: short, thick, relaxed vfs

What we hear: Low pitched voiced sound (right side in pic)