MUSCLES OF THE BACK

Question 1

Origin of the trapezius

Answer 1

Superior nuchal line, external occipital protuberance, Nuchal ligament and C7 to T12

Question 2

Insertion of trapezius

Answer 2

Lateral one third of clavicle, acromion and spine of scapula

Question 3

Action of upper fibres of trapezius

Answer 3

Elevate the scapula

Question 4

Action of middle fibres of trapezius

Answer 4

Adduct the scapula

Question 5

Action of lower fibres of scapula

Answer 5

Depress the scapula

Question 6

Innervation of trapezius

Answer 6

Accessory nerve

Question 7

Origin of latissimus dorsi

Answer 7

Spinous process of T7 to T12, outer lip of iliac crest, ribs 8 to 12 and inferior angle of scapula

Question 8

Insertion of latissimus dorsi

Answer 8

Floor of intertubercular sulcus of humerus

Question 9

Action of latissimus dorsi

Answer 9

Adduction, medially rotates the arm, extends

Question 10

Innervation of latissimus dorsi

Answer 10

Thoracodorsal nerve

Question 11

Origin of levator scapula

Answer 11

Transverse process of C1 to C4

Question 12

Insertion of levator scapula

Answer 12

Superior angle of scapula and upper part of medial border of scapula

Question 13

Action of levator scapula

Answer 13

Elevates the scapula

Question 14

Innervation of levator scapula

Answer 14

Dorsal scapular nerve

Question 15

Origin of rhomboid minor

Answer 15

Ligamentum nuchae and spinous process of C7 to T1

Question 16

Insertion of rhomboid minor

Answer 16

Medial border of scapula

Question 17

Origin of rhomboid major

Answer 17

Spinous process of T2 to T5

Question 18

Insertion of rhomboid major

Answer 18

Medial border of scapula below rhomboid manior

Question 19

Action of rhomboids

Answer 19

Retracts the scapula

Question 20

Innervation of rhomboids

Answer 20

Dorsal scapula nerve

Question 21

Origin of serratus post superior

Answer 21

Nuchal ligament, spinous process of C7 to T3

Question 22

Insertion of serratus post. superior

Answer 22

Upper borders of ribs 2-5

Question 23

Origin of serratus post. inferior

Answer 23

Spinous process of T11 to L2

Question 24

Insertion of serratus post. inferior

Answer 24

Ribs 9-12

Question 25

Action of serratus post. superior

Answer 25

Deep insipration

Question 26

Action of serratus post. inferior

Answer 26

Deep expiration