Posterior Axio-Appendicular Muscles

Question 1

Trapezius

Answer 1

O: external occipital protuberance/ligamentum nuchae/spinous processes of C1-T12
I: posterior lateral clavicle/medial surface of acromion process/scapular spine
A: upper: elevation, adduction, upward rotation of shoulder girdle
middle: scapular adduction
lower: depression, adduction and upward rotation of shoulder girdle
I: spinal accessory CN XI

Question 2

latissimus dorsi

Answer 2

O: spinous processes of T7-S5/posterior iliac crest
I: intertubercular groove
A: shoulder adduction, shoulder extension from flexed, shoulder internal rotation
I: thoracodorsal

Question 3

levator scapulae

Answer 3

O: transverse processes of C1-C4
I: superior angle of scapula/medial border of scapula (superior to scapular spine)
A: scapular elevation, lateral flexion of neck, downward rotation of scapula
I: dorsal scapular

Question 4

rhomboid minor

Answer 4

O: spinous processes of C7 and T1
I: medial border of scapula (level of scapular spine)
A: scapular adduction/downward rotation of scapula
I: dorsal scapular

Question 5

rhomboid major

Answer 5

O: spinous processes of T2-5
I: medial border of scapula (inferior to scapular spine)
A: scapular adduction/downward rotation of scapula
I: dorsal scapular