Back Muscles

Question 1

Action of erector spinae

Answer 1

Extension and lateral flexion of the vertebral column, helps maintain posture

Question 2

Innervation of erector spinae

Answer 2

Local dorsal rami

Question 3

Serratus posterior are accessory muscles of

Answer 3

Respiration

Question 4

Action of serratus posterior superior

Answer 4

Elevates ribs 2-5 involved with inspiration

Question 5

Innervation of serratus posterior superior

Answer 5

Upper intercostal nerves

Question 6

Action of serratus posterior inferior

Answer 6

Depresses ribs 9-12 involved with expiration

Question 7

Innervation of Serratus posterior inferior

Answer 7

Lower intercostal nerves

Question 8

Deep muscles

Answer 8

Semispinalis
Multifidus 
Rotators
Interspinales
Intertransversari
Levatores costarum
Splenius capitis

Question 9

3 groups of semispinalis

Answer 9

Capitis, cervicis, thoracis

Question 10

Origin of multifidus and inserts where

Answer 10

Origin: Sacrum/ilium
Inserts: vertebrae of the lumbar region

Question 11

Rotators origin and insertion

Answer 11

Runs from the transverse process of the spine to the spinous process of C1-C2

Question 12

Connections of interspinales

Answer 12

Between neighboring spinous processes and shortening of the fibers can cause extension of the spine

Question 13

Intertransversari connections

Answer 13

Between neighboring transverse processes and shorting causes lateral flexion

Question 14

Origin and insertion of splenius capitis

Answer 14

Runs from the nuchal line to the spinous process of C7 and upper thoracic spine

Question 15

Erector spinae muscles

Answer 15

Iliocostalis
Longissimus
Spinalis

Question 16

Triangle of Auscultation muscles

Answer 16

Trapezius, latissimus dorsi, levator scapulae

Question 17

Innervation and perfusion of trapezius

Answer 17

Innervated by spinal accessory nerve CV XI

Perfused by transverse cervical artery and vein

Question 18

Action of trapezius

Answer 18

Elevations, retraction, and rotation of most scapular movements

Question 19

Origin and insertion of trapezius

Answer 19

Origin: medial plane of vertebrae
Insertion: lateral 1/3 of clavicle and spine of scapula

Question 20

Origin and insertion of latissimus dorsi

Answer 20

Origin: vertebral spines from T7 to sacrum, posterior third of iliac crest, lower 3 or 4 ribs (thoracodorsal fascia)

Insertion: intertubercular groove

Question 21

Action of latissimus dorsi

Answer 21

Extends the arm and rotates the arm medically

Question 22

Innervation of latissimus dorsi

Answer 22

Thoracodorsal nerve (C7, 8) from posterior cord of brachial plexus

Question 23

Innervation of levator scapulae

Answer 23

Dorsal scapular nerve

Question 24

Artery of levator scapulae

Answer 24

Deep branch of transverse cervical artery

Question 25

Action of levator scapulae

Answer 25

Elevates the scapula

Question 26

Origin of rhomboideus major

Answer 26

Spines of vertebrae T2-T5

Question 27

Origin of rhomboideus minor

Answer 27

Inferior end of ligamentum nuchae, spines of vertebrae C7 and T1

Question 28

Insertion of rhomboids

Answer 28

Medial scapula

Question 29

Innervation of rhomboids

Answer 29

Dorsal scapular nerve

Question 30

Rhomboids depress the

Answer 30

Glenoid fossa

Question 31

Action of rhomboids

Answer 31

Retract the scapula (standing at attention”

Question 32

Arteries of rhomboids

Answer 32

Deep branch of transverse cervical arteries

Question 33

Innervations of rhomboids

Answer 33

Dorsal scapular nerve

Question 34

Origin of obliquus capitis inferior

Answer 34

Spinous process of the axis

Question 35

Origin of obliquus capitis superior

Answer 35

Transverse process of atlas

Question 36

Origin of rectus capitis posterior major

Answer 36

Spinous process of axis

Question 37

Origin of rectus capitis posterior minor

Answer 37

Posterior tubercle of atlas