Origins:   external occipital protuberance

superior nuchal lines

nuchal ligament

spinous processes of c7-t12

supraspinous ligament of c7-t12

Insertions:lateral third of the clavicle

    acromion process

scapular spine

Actions:

extends the neck and head

elevates the scapula

upwardly rotates the scapula

retracts the scapula

depresses the scapula

laterally flexes the neck

rotates the head

Origins: transverse processes of c1-c4

Insertion: medial border of the scapula

Actions:

elevates the scapula

downwardly rotates the scapula

laterally flexes the neck

Origins:

spinous processes of c7-t1

spinous processes of t2-t5

Insertions:

medial border of the scapula, from root of scapular spine

to inferior angle

Actions:

retracts the scapula

downwardly rotates the scapula

Origins:

ribs 1 through 9 (lateral costal cartliage)

Insertion:

anterior medial border of the scapula

Actions:

protracts the scapula

upwardly rotates the scapula

depresses the scapula

Origins:

ribs 3 through 5 (lateral to costal cartilage)

insertion:

coracoid process of the scapula

Actions:

depresses the scapula

protracts the scapula

downwardly rotates the scapula

assists in forced inspiration