Superficial Back

Question 1

What are the superficial extrinsic muscles of the back?

Answer 1

Trapezius, Latissimus dorsi, Levator scapulae, Rhomboids

Question 2

What are the intermediate extrinsic muscles of the back?

Answer 2

Serratus posterior superior, and Serratus posterior inferior

Question 3

What nerve(s) innervate the superficial extrinsic muscles of the back?

Answer 3

Anterior rami of spinal nerves

Question 4

What nerve(s) innervate the intermediate extrinsic muscles of the back?

Answer 4

Anterior rami of spinal nerves, and intercostal nerves

Question 5

What are the superficial intrinsic muscles of the back?

Answer 5

Splenius capitis, Splenius cervicis

Question 6

What nerve(s) innervate the superficial intrinsic muscles of the back?

Answer 6

Posterior rami of spinal nerves

Question 7

What are the intermediate intrinsic muscles of the back?

Answer 7

Erector spinae; Spinalis, longissimus, iliocostalis

Question 8

What nerve(s) innervate the intermediate intrinsic muscles of the back?

Answer 8

Posterior rami of spinal nerves

Question 9

What are the deep intrinsic muscles of the back?

Answer 9

Transversospinales; semispinalis, multifidus, rotatores

Question 10

What nerve(s) innervate the deep intrinsic muscles of the back?

Answer 10

Posterior rami of spinal nerves

Question 11

Trapezius attachments

Answer 11

from… superior nuchal line, external occipital protuberance, ligamentum nuchae, & cervical & thoracic spinous processes
to… clavicle, acromion & scapular spine

Question 12

Trapezius actions

Answer 12

scapular elevation (upper), depression (lower), retraction (middle), & upwards rotation (upper & lower)

Question 13

Trapezius innervation

Answer 13

accessory nerve (CN XI),
(sensory: C3-4)

Question 14

Latissimus dorsi attachments

Answer 14

from… lower thoracic spinous processes, thoracolumbar fascia & iliac crest
to… floor of intertubercular sulcus of the humerus

Question 15

Latissimus dorsi actions

Answer 15

adduction, extension, and medial rotation of humerus

Question 16

Latissimus dorsi innervation

Answer 16

thoracodorsal nerve (C6-8)

Question 17

Rhomboids attachments

Answer 17

major: from… spinous processes T2-5; minor: from… ligamentum nuchae & spinous processes C7-T1
to… medial border of scapula

Question 18

Rhomboids actions

Answer 18

actions - scapular retraction, elevation & downward rotation

Question 19

Rhomboids innervation

Answer 19

PNS: dorsal scapular nerve (CNS: C4-C5)
sensory: direct branches of C3-4

Question 20

Levator scapulae attachments

Answer 20

from… transverse processes of C1-C4
to… superior angle and superomedial border of the scapula

Question 21

Levator scapulae actions

Answer 21

elevation & downward rotation of scapula

Question 22

Levator scapulae innervation

Answer 22

dorsal scapular nerve (C4-C5)
sensory: direct branches of C3-4

Question 23

Dermatomes