Muscles Of The Shoulder Girdle

Question 1

Upper trapezius

Answer 1

Attachment- external occipital protuberance, the medial 1/3 of the superior nuchal line of the occipit, the nuchal ligament, spinous process of C7

Insertion- lateral 1/3 of the clavicle and the acrominum process of the scapula

Functions- elevates, retracts and upwardly rotates has the scapula at the ScC joint

Question 2

Middle trapezius

Answer 2

Attachments- the spinous processes of T1-T5

Insertions- acromion process and spine of the scapula

Functions- retracts scapula at the ScC joint

Question 3

Lower trapezius

Answer 3

Attachment- spinous processes of T6-T12

Insertions- the tubercle at the root of the spine of the scapula

Functions- depresses scapula at the ScC joint

Question 4

Rhomboids minor

Answer 4

Attachments- spinous processes of C7-T1 and the inferior nuchal ligament

Insertions- root of the spine of the scapula

Functions - retracts, elevates and downwardly rotates the scapula at the ScC joint

Question 5

Rhomboids major

Answer 5

Attachment- spinous processes of T2-T5

Insertions- between the root of the spine and the inferior angle of the scapula

Functions- retracts, elevates and downwardly rotates the scapula

Question 6

Levator scapulae

Answer 6

Origin- transverse processes of C1-C4

Insertion- medial border of the scapula, from the superior angle to the root of the spine of the scapula

Functions- elevates the scapula at the ScC joint

Question 7

Serratus anterior

Answer 7

Origin- anterolaterally, ribs 1-9

Insertion- anterior surface of the entire medial border of the scapula

Functions- protracts and upwardly rotates the scapula at the ScC joint

Question 8

Pectoralis minor

Answer 8

Origin- ribs 3-5

Insertion- medial aspect of the coracoid process of the scapula

Functions- protracts, depresses and downwardly rotates the scapula at the ScC joint