Muscles of the Upper Extremity: Axioscapular-Axioclavicular Muscles

Question 1

Upper Trapezius Proximal Attachment

Answer 1

Medial end of the superior nuchal line, external occipital protuberance, ligamentum nuchae, and spinous process of C7

Question 2

Upper Trapezius Distal Attachment

Answer 2

Lateral end of the clavicle and acromion process

Question 3

Upper Trapezius Innervation

Answer 3

Spinal accessory n. [CN XI]

Question 4

Upper Trapezius Action

Answer 4

Rotates scapula upward
Elevates the scapula
Assists with:
-Extension of the head/neck
-Lateral flexion of the head/neck
-Rotation of the head/neck to the opposite side

Question 5

Middle Trapezius Proximal Attachment

Answer 5

Spinous processes of T1-5

Question 6

Middle Trapezius Distal Attachment

Answer 6

Acromion process and spine of scapula

Question 7

Middle Trapezius Innervation

Answer 7

Spinal accessory n. [CN XI]

Question 8

Middle Trapezius Action

Answer 8

Adducts the scapula

Question 9

Lower Trapezius Proximal Attachment

Answer 9

Spinous processes of T6-12

Question 10

Lower Trapezius Distal Attachment

Answer 10

Spine of scapula

Question 11

Lower Trapezius Innervation

Answer 11

Spinal accessory n. [CN XI]

Question 12

Lower Trapezius Action

Answer 12

Rotates scapula upward

Depresses the scapula

Question 13

Levator Scapulae Proximal Attachment

Answer 13

Transverse processes of C1-4

Question 14

Levator Scapulae Distal Attachment

Answer 14

Medial border of the scapula between the superior angle and root of the spine

Question 15

Levator Scapulae Innervation

Answer 15

Dorsal scapular n. [C5]

Ventral rami of spinal nn. [C3,C4]

Question 16

Levator Scapulae Action

Answer 16

Elevates the scapula
Rotates scapula downward
Assists with:
-Lateral flexion of the head/neck
-Extension of the head/neck
-Rotation of the head/neck to the same side

Question 17

Rhomboid Minor Proximal Attachment

Answer 17

Ligamentum nuchae and spinous processes of C7-T1

Question 18

Rhomboid Minor Distal Attachment

Answer 18

Medial border of the scapula at root of spine

Question 19

Rhomboid Minor Innervation

Answer 19

Dorsal scapular n. [*C5]

Question 20

Rhomboid Minor Action

Answer 20

Adducts the scapula
Elevates the scapula
Rotates scapula downward

Question 21

Rhomboid Major Proximal Attachment

Answer 21

Spinous process of T2-5

Question 22

Rhomboid Major Distal Attachment

Answer 22

Medial border of the scapula between the root of the spine and inferior angle

Question 23

Rhomboid Major Innervation

Answer 23

Dorsal scapular n. [*C5]

Question 24

Rhomboid Major Action

Answer 24

Adducts the scapula
Elevates the scapula
Rotates scapula downward

Question 25

Serratus Anterior Proximal Attachment

Answer 25

Ribs 1-8

Question 26

Serratus Anterior Distal Attachment

Answer 26

Anterior surface of the medial border of the scapula

Question 27

Serratus Anterior Innervation

Answer 27

Long thoracic n. [C5,C6,C7]

Question 28

Serratus Anterior Action

Answer 28

Abducts the scapula
Rotates scapula upward
Holds medial border of the scapula against posterior thoracic wall

Question 29

Pectoralis Minor Proximal Attachment

Answer 29

Ribs 3-5

Question 30

Pectoralis Minor Distal Attachment

Answer 30

Coracoid process of the scapula

Question 31

Pectoralis Minor Innervation

Answer 31

Medial pectoral n. [C8,T1]

Question 32

Pectoralis Minor Action

Answer 32

Tilts the scapula anteriorly
Depresses the shoulder girdle
Assists with:
-Elevation of ribs during forced inhalation

Question 33

Subclavius Proximal Attachment

Answer 33

Junction of the 1st rib and 1st costal cartilage

Question 34

Subclavius Distal Attachment

Answer 34

Inferior surface of the middle of the clavicle

Question 35

Subclavius Innervation

Answer 35

Nerve to subclavius {*C5,C6]

Question 36

Subclavius Action

Answer 36

Depresses the clavicle

Stabilizes the sternoclavicular joint