A&P quiz 2

Thyroarytenoid origin

Inside surface of thyroid cartilage

Thyroarytenoid fiber course

Runs parallel to the vocal ligaments

Thyroarytenoid insertion point

Arytenoid cartilage on the opposite side

Thyroarytenoid function

Shorten and lengthen, tense and untense

Posterior cricoarytenoid origin

Cricoid lamina

Posterior cricoarytenoid fiber course

Upward and to the side

Posterior cricoarytenoid insertion point

Upper and back surface of the muscular process of the arytenoid cartilage

Posterior cricoarytenoid function

Rocks arytenoid cartilage away from the midline opening vocal folds (abduction)

Lateral cricoarytenoid origin

upper rim of cricoid cartilage

Lateral cricoarytenoid fiber course

upward and backward

Lateral cricoaryetenoid insertion point

muscular process of arytenoid cartilage

Lateral cricoarytenoid function

Rocks arytenoid cartilage together (adduction)

Transverse arytenoid origin

Back surface and side of one arytenoid cartilage

Transverse arytenoid fiber course

Horizontal

Transverse arytenoid insertion point

Back surface and side of the other arytenoid cartilage

Transverse arytenoid function

Pulls one arytenoid cartilage towards the other in a tipping motion

Oblique arytenoid origin

Back surface and side of one arytenoid cartilage

Oblique arytenoid fiber course

cross section

Oblique arytenoid insertion point

Back surface and side of the other arytenoid cartilage

Oblique arytenoid function

Pulls one arytenoid cartilage towards the other in a tipping motion

Sternothyroid origin

back and top of sternum and fist costal cartilage (1st rib)

Strerothyroid fiber course

upward and slightly towards the side

Sternothyroid insertion point

outer surface of thyroid cartilage

Sternothyroid function

pulls thyroid down and enlarges pharynx

Thyrohyoid origin

Outer surface of thyroid cartilage

Thyrohyoid fiber course

Vertical

Thyrohyoid insertion point

Lower edge of greater cornu of the hyoid bone

Thyrohyoid function

Decreases distance between thyroid cartilage and hyoid bone

Inferior constrictor origin

Median (raphe) seam of pharynx

Inferior constrictor fiber course

wraps around from back to front moving downward

Inferior constrictor insertion point

Sides of cricothyroid muscles

Inferior constrictor function

Moves walls of pharynx inward

Sternohyoid origin

Back surface of top of sternum and clavicle

Sternohyoid fiber course

Straight up

Sternohyoid insertion point

Lower edge of body of the hyoid bone

Sternohyoid function

Downward pull on hyoid bone

Posterior omohyoid origin

Arises from scapula

Posterior omohyoid fiber course

Horizontally inward and forward

Posterior omohyoid insertion point

Attaches to an intermediate tendon near the sternum
(tendon attaches anterior and posterior omohyoid)

Posterior omohyoid function

Pulls inward on the hyoid bone

Anterior omohyoid origin

Begins at intermediate tendon

Anterior omohyoid fiber course

Vertical towards midline

Anterior omohyoid insertion point

Greater cornu of the hyoid bone

Anterior omohyoid function

Pulls downward on the hyoid bone