Axioappendicular Muscles (Superficial Back/Pectoral Region)

Question 1

Latissimus dorsi - Attachments

Answer 1

FROM
*lower thoracic spinous processes, thoracolumbar fascia & iliac crest

TO
*the floor of the intertubercular sulcus of the humerus

Question 2

Latissimus dorsi - Actions

Answer 2

*adduction, extension & medial rotation of humerus

Question 3

Latissimus dorsi - Innervation

Answer 3

Thoracodorsal nerve
(C6-8)

Question 4

Levator scapulae - Attachments

Answer 4

FROM
*transverse processes of C1-C4

TO
*the superior angle & superomedial border of the scapula

Question 5

Levator scapulae - Actions

Answer 5

*elevation & downward rotation of the scapula

Question 6

Levator scapulae - Innervation

Answer 6

dorsal scapular nerve
(C4-5)

sensory: direct branches of C3-4

Question 7

Pectoralis major - Attachments

Answer 7

FROM
*clavicle
*costal cartilages
*sternum
*aponeurosis of the external oblique

TO
*the lateral lip of the intertubercular sulcus of the humerus

Question 8

Pectoralis major - Action

Answer 8

*humeral adduction flexion & medial rotation *sternocostal portion assists with extension of the flexed arm

Question 9

Pectoralis major - Innervation

Answer 9

lateral & medial pectoral nerves

clavicular head
C5-7 (Lateral pectoral nerve)

sternocostal head
C8-T1 (Medial pectoral nerve)

Question 10

Pectoralis minor - Attachment

Answer 10

FROM
*outer surfaces of ribs 3-5

TO
*the coracoid process

Question 11

Pectoralis minor - Action

Answer 11

*anterior tilt of scapula
*assists with depression of the shoulder
*forced inspiration

Question 12

Pectoralis minor - Innervation

Answer 12

medial & lateral pectoral nerves
(C5-T1)

Question 13

Rhomboids - Attachment

Answer 13

FROM
*spinous processes T2-5 (major)
* from ligamentum nuchae (minor)
*spinous processes C7-T1

TO
*the medial border of the scapula

Question 14

Rhomboids - Action

Answer 14

*scapular retraction, elevation (upper) & downward rotation

Question 15

Rhomboids - Innervation

Answer 15

dorsal scapular nerve
C4-5

(sensory: direct branches of C3-4)

Question 16

Serratus anterior - Attachments

Answer 16

FROM
*the outer surfaces & superior borders of upper eight-ten ribs

TO
*the costal surface of the medial border of the scapula

Question 17

Serratus anterior - Action

Answer 17

*scapular protraction & upward rotation

Question 18

Serratus anterior - Innervation

Answer 18

long thoracic nerve
(C5-7)

Question 19

Subclavius - Attachments

Answer 19

FROM
*1st rib & cartilage

TO
*the undersurface of the clavicle

Question 20

Subclavius - Action

Answer 20

*depresses & stabilizes the clavicle

Question 21

Subclavius - Innervation

Answer 21

subclavian nerve
(C5-6)

Question 22

Trapezius - Attachment

Answer 22

FROM
*the superior nuchal line
*external occipital protuberance
*ligamentum nuchae
*cervical & thoracic spinous processes

TO
*the clavicle
*acromion
*scapular spine

Question 23

Trapezius - Action

Answer 23

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

Question 24

Trapezius - Innervation

Answer 24

Accessory n. [CN XI] motor

C3-4 sensory