Post Axioappendicular Muscles

Question 0

latissimus dorsi

Answer 0

O: spinous processes of T6-T12, iliac crests, thoracolumbar
fascia, inf 3-4 ribs
I: floor of intertubercular sulcus
N: thoracodorsal (C6, C7, C8)
A: extends, adducts, and med rotates humerus; raises body when
arms are extended

Question 1

Trapezius

Answer 1

O: nuchal ligament, EOP, medial 1/3 of sup nuchal line, spinous
processes of C7-T12
I: lateral 1/3 of clavicle, acromian process, spina of scapula
N: motor– spinal accessory nerve (CN XI)
sensory: C3, C4
A: sup fibers– elevate scapula
middle fibers– retract scapula
inf fibers– depress scapula
together– rotate glenoid cavity sup

Question 2

levator scapulae

Answer 2

O: post tubercles of transverse processes of C1-C4
I: med border of scapula sup to root of spine
N: dorsal scapular (C5), and C3, C4
A: elevates scapula, downwardly rotates glenoid

Question 3

rhomboid major

Answer 3

O: spinous processes of T2-T5
I: med border of scapula just inf to spine
N: dorsal scapular (C5)
A: retracts scapula, downwardly rotates glenoid; fix scapula to
thoracic wall

Question 4

rhomboid minor

Answer 4

O: nuchal ligament, spinous processes of C7, T1
I: med border of scapula at root of spine
N: dorsal scapular (C5)
A: retracts scapula and downwardly rotates glenoid