Superficial Back Muscles

Question 0

Insertions of Trapezius

Answer 0

Lateral 3rd clavicle
Acromion of scapula
Spine of scapula

Question 1

Origin of Trapezius

Answer 1

Medial 3rd of superior nuchal line
External Occipital Protuberance
Nuchal ligament
Spinous process of C7-T12

Question 2

Innervation of Trapezius

Answer 2

Spinal accessory nerve (CN XI)

C3 and C4

Question 3

Action of Trapezius

Answer 3

Descending (superior) : elevates
Ascending (inferior) : depress
Together rotate glenoid cavity superiorly

Question 4

Origin of the Latissimus Dorsi

Answer 4

Spinous processes of T7-T12
Thoracolumbar fascia
Illiac crest
Inferior 3 or 4 ribs

Question 5

Insertion of Latissimus dorsi

Answer 5

Floor of the intertubercular sulcus (groove) of humerus

Question 6

Innervation of Latissimus Dorsi

Answer 6

Thoracodorsal nerve (C6-C8)

Question 7

Action of Latissimus Dorsi

Answer 7

Extends humerus
Adducts humerus
Medially rotates humerus

Question 8

Origin of Rhomboid minor

Answer 8

Spinous process of C7 and T1

Nuchal ligament

Question 9

Insertion of Rhomboid minor

Answer 9

Medial border of scapula (at spine)

Question 10

Action of Rhomboid major and minor

Answer 10

Retracts scapula

Rotates to depress glenoid cavity

Question 11

Innervation of Rhomboid major and minor

Answer 11

Dorsal scapular nerve (C4 and C5)

Question 12

Origin of Levator scapulae

Answer 12

Posterior tubercles of transverse process of C1-C4

Question 13

Insertion of Levator scapulae

Answer 13

Medial border of scapula superior to root of the spine

Question 14

Innervation of Levator scapula

Answer 14

Dorsal scapular nerve (C5)
Cervical nerves (C3 and C4)

Question 15

Actions of Levator scapulae

Answer 15

Elevates scapula

Tilts glenoid cavity inferiorly by rotating scapula