Posterior Axio-appendicular Muscles

Question 1

Superficial Extrinsic Shoulder Muscles (2)

Answer 1

trapezius

latissimus dorsi

Question 2

Trapezius - M

Answer 2

medial third of superior nuchal line, external occipital protuberance, nuchal ligament, spinous processes of C7-T12

Question 3

Trapezius - L

Answer 3

lateral third of clavicle, acromion, and spine of scapula

Question 4

Trapezius - N

Answer 4

motor: accessory nerve (CN XI)
sensory: C3/C4 spinal nerves

Question 5

Trapezius - A

Answer 5

superior part: scapular elevation
inferior part: scapular depression
middle part/all together: scapular retraction
superior/inferior together: superior rotation of glenoid cavity

Question 6

Latissimus dorsi - M

Answer 6

spinous processes of T7-T12, thoracolumbar facia, iliac crest, inferior 3 or 4 ribs

Question 7

Latissimus dorsi - L

Answer 7

floor of intertubercular sulcus (bicipital groove) and inferior corner of scapula

Question 8

Latissimus dorsi - N

Answer 8

thoracodorsal nerve

Question 9

Latissimus dorsi - A

Answer 9

shoulder extension
shoulder adduction
shoulder medial rotation
raises body towards arms during climbing
*scapular stabilization

Question 10

Deep Extrinsic Shoulder Muscles (3)

Answer 10

levator scapulae
rhomboid major
rhomboid minor

Question 11

Levator scapulae - M

Answer 11

posterior tubercles of transverse processes of C1-C4

Question 12

Levator scapulae - L

Answer 12

medial border of scapula superior to root of spine

Question 13

Levator scapulae - N

Answer 13

dorsal scapular nerve

Question 14

Levator scapulae - A

Answer 14

scapular elevation

tilts glenoid cavity inferiorly by rotation scapula

Question 15

Rhomboid major - M

Answer 15

spinous processes of T2-T5

Question 16

Rhomboid major - L

Answer 16

medial border of scapula from spine to inferior angle

Question 17

Rhomboid major - N

Answer 17

dorsal scapular nerve

Question 18

Rhomboid major - A

Answer 18

scapular retraction

rotates scapula to depress glenoid cavity

Question 19

Rhomboid minor - M

Answer 19

nuchal ligament, spinous processes of C7 and T1

Question 20

Rhomboid minor - L

Answer 20

medial scapular spine

Question 21

Rhomboid minor - N

Answer 21

dorsal scapular nerve

Question 22

Rhomboid minor - A

Answer 22

scapular elevation

rotates scapula to tilt glenoid cavity inferiorly