Lab 6 Pectoral Girdle Muscles (origins + insertions)

Question 1

Trapezius m.

Answer 1

Origin = occipital protuberance, SP C7-T12
Insertion = lateral third of clavicle, spine + acromion of scapula

Question 2

Levator Scapulae m.

Answer 2

Origin = TP C1-4
Insertion = upper quarter of medial border of scapula

Question 3

Rhomboideus Minor m.

Answer 3

Origin = SP C7-T1
Insertion = mid portion of medial border of scapula

Question 4

Rhomboideus Major m.

Answer 4

Origin = SP T2-5
Insertion = lower half of medial border of scapula

Question 5

Pectoralis Minor m.

Answer 5

Origin = ribs 3-5
Insertion = coracoid process

Question 6

Subclavius m.

Answer 6

Origin = 1st rib and costal cartilages
Insertion = subclavian groove of clavicle

Question 7

Serratus Anterior m.

Answer 7

Origin = first 8/9 ribs
Insertion = medial border of scapula