Class 11 notes

intrinsic

adductors, abductors, glottal tensors/relaxers

origin and insertion inside the larynx

lateral cricoarytenoid

rotate out, not used in speech production, used in breathing/ swallowing

origin; lateral cricoid

insertion: muscular process of arytenoid

Posterior cricoarytenoid

Abductor: twists to cause opening motion
orgin: posterior cricoid
insertion: muscular process of arytenoids

laryngeal elevators and depressers:

elevators cause the larynx to rise during swallowing and depressors cause it to go back down into place

Thyromuscularis

The glottal relaxer
Origin: thyroid cartilage
Insertion: muscular process

laryngeal elevator

things that are going to raise the larynx

laryngeal depressors

things that are going to pull larynx back down

digastricus

laryngeal elevator (anterior and posterior) - elevates the hyoid bone, two parts ant. and pos. belly

omohyoid

laryngeal depressor (both inferior and superior) - pulls the hyoid bone down with the larynx after elevation, superior connects with hyoid, inferior connects with scapula.