Shoud3r Girdle Muscles

Question 1

Serratus anterior. Ori, insertion, Innervation

Answer 1

Ori: upper nine ribs at the side of the chest.
Insertion: costal aspects( side articulating with the ribs) of medial border of scapula.
Innervation: long thoracic nerve.

Question 2

Pectoralis minor ori, insertion and Innervation

Answer 2

Ori: outer surface of ribs 3-5
Insertion: coracoid process of the scapula.
Action: scapula protractor and rotation of the scapula downward.
Innervation: medial pectoral nerve.

Question 3

Levator scapulae. Ori,insertion and innervation.

Answer 3

Origine: transverse processes of C1-4
Insertion: medial border of the scapula above the level of the scapula spine.
Innervation: cervical and dorsal scapular nerve

Question 4

Rhomboids ori, insertion innervation

Answer 4

Ori:Spinous processes of C7-T5
Insertion: medial border of the scapula below the level of the spine otlf the scapula.
Innervation: dorsal scapular nerve
Action: bringing th3 shoulder blades together.

Question 5

Trapezius muscle ori, insertion, innervation

Answer 5

Ori: occipital protuberance, ligaments cervical spine and spinous processes of C7-T12
Insertion: posterior outer1/3 of the clavicle, acromion process and spine of the scapula
Action: scapula elevation, scapula retraction, upward rotation of the scapula
Innervation: cranial nerve

Question 6

Latissimus. Ori, insertion and innervation.

Answer 6

Ori: Spinous process of the 7th to 12th thoracic vertebrae and the thoracolumbar fascia
Costal part(9-12 ribs)
Iliac part( iliac crest
Scapular part: inferior angle of the scapula.