Superficial Muscles of the Back

Question 1

Attachments of the Trapezius

Answer 1

Medial: nuchal line, external occipital protuberance, ligamentum nuchae, spinal proceses C7-T12

Lateral: lateral 1/3 of the clavicle and acromion, and spine of scapula

Question 2

what is the torque of the Trapezius

Answer 2

• rotates scapula to tilt the glenoid cavity superiorly
• elevates, retracts, and depresses scapula

Question 3

what innervates the Trapezius

Answer 3

spinal accessory nerve

Question 4

what are the attachments of the latissimus dorsi

Answer 4

medial: spinous process T7-L5, thoracolumbar fasica, sacrum, iliac crest, ribs 10-12

Lateral: intertubercular sulcus of the humerus

Question 5

what is the torque of the Latissimus Dorsi

Answer 5

extends, adducts, and medially rotates the humerus

Question 6

what innervates the Latissimus Dorsi

Answer 6

Thoracodorsal Nerve (middle subscapular nerve)

Question 7

what are the attachments of the Levator Scapulae

Answer 7

Medial: transverse process C1-C4

Lateral: superior angle of scapula

Question 8

what is the torque of the Levator Scapulae

Answer 8

• elevates shoulder
• lateral flexion to same side

Question 9

what are the attachments of the Rhomboid Major

Answer 9

Medial: spinous process T2-T5

Lateral: medial boarder of scapula below spine

Question 10

what is the torque of the Rhomboid Major

Answer 10

adduction/retraction of scapula

Question 11

what innervates the Levator Scapulae

Answer 11

Dorsal Scapular Nerve

Question 12

What innervates the Rhomboid Major

Answer 12

Dorsal Scapular Nerve

Question 13

what innervates the Rhomboid Minor

Answer 13

Dorsal Scapular Nerve

Question 14

what are the attachments of the Rhomboid Minor

Answer 14

Medial: Ligamentum nuchae and spinal processes C7-T1

Lateral: medial boarder of scapula at spine

Question 15

what is the torque of the Rhomboid Minor

Answer 15

retracts and downwardly rotates the scapula to tilt the glenoid cavity inferiorly