Muscles Connecting Trunk to Upper Extremity (axio-appendicular)

Question 1

Latissimus dorsi Attachments (C6-8)

Answer 1

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

Question 2

Latissimus dorsi Actions

Answer 2

Actions: adduction, extension, and medial rotation of humerus

Question 3

Latissimus Dorsi Innervation

Answer 3

Innervation: thoracodorsal nerve

Question 4

Levator Scapulae Attachments (C4-5)

Answer 4

Attachments: from transverse processes of C1-C4 to the superior angle & superomedial border of the scapula

Question 5

Levator Scapulae Actions (C4-5)

Answer 5

Actions: elevation and downward rotation of the scapula

Question 6

Levator Scapulae Innervation (C4-5)

Answer 6

Innervation: dorsal scapular nerve

sensory: direct branches of C3-4

Question 7

Pectoralis Major Attachments

Answer 7

Attachments: 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 Actions

Answer 8

Actions: humeral adduction, flexion & medial rotation (sternocostal portion assists with extension of flexed arm)

Question 9

Pectoralis Major Innervation

Answer 9

Innervation: medial & lateral pectoral nerves

Question 10

Rhomboids Attachments

Answer 10

Attachments:
Major: from spinous processes T2-5
Minor: from ligementum nuchae & spinous processes C7-11 to the medial border of the scapula

Question 11

Rhomboids Actions

Answer 11

Actions: scapular retraction, elevation and downward rotation

Question 12

Rhomboids Innervation

Answer 12

Innervation: dorsal scapular nerve
sensory: both branches of C3-4

Question 13

Serratus Anterior Attachments

Answer 13

Attachments: from the outer surfaces & superior borders of upper eight-ten ribs to the costal surface of the medial border of the scapula

Question 14

Serratus Anterior

Answer 14

Actions: scapular protraction & upward rotation

Question 15

Serratus Anterior Innervation

Answer 15

Innervation: long thoracic nerve

Question 16

Subclavius Attachments

Answer 16

Attachments: from 1st rib & cartilage to the undersurface of the clavicle

Question 17

Subclavius Actions

Answer 17

Actions: depresses & stabilizes the clavicle

Question 18

Subclavius Innervation

Answer 18

Innervation: subclavian nerve

Question 19

Trapezius Attachments

Answer 19

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

Question 20

Trapezius Actions

Answer 20

Actions: 
Scapular elevation (upper)
scapular depression (lower) 
scapular retraction (middle) 
scapular upward rotation ( upper & lower)

Question 21

Trapezius Innervation

Answer 21

Innervation: accessory nerve (CN XI & motor)

and C3-4 (sensory)