Back Muscles

Question 1

Trapezius

Answer 1

A: Rotate, retract, elevate, and depress scapula; w/scapula fixed: extend neck, laterally flex neck, rotate face away

I: Spinal accessory nerve

BS: Transverse Cervical Artery

Question 2

Latissimus Dorsi

Answer 2

A: Extend, adduct, and medially rotate humerus

I: Thoracodorsal nerve

BS: Thoracodorsal artery

Question 3

Rhomboid Major + Minor

Answer 3

A: Retract + Elevate scapula, rotate the glenoid cavity inferiorly

I: Dorsal scapular nerve

BS: Dorsal Scapular artery

Question 4

Levator Scapulae

Answer 4

A: Retract + elevate scapula, rotate the glenoid cavity inferiorly; w/scapula fixed: extend the neck + laterally flex the neck

I: Dorsal scapular nerve

BS: Dorsal scapular artery

Question 5

Serratus Posterior Superior

Answer 5

A: Elevate the upper ribs during forced inspiration, proprioception

I: Intercostal nerves 2-5

BS: Intercostal arteries

Question 6

Serratus Posterior Inferior

Answer 6

A: Depresses the ribs during forced expiration, proprioception

I: Anterior rami of T9-12

BS: Intercostal arteries

Question 7

Splenius Capitis

Answer 7

A: Extend the neck, laterally flex the neck, rotate the face toward

I: Posterior Rami C3-C5

BS: Muscular branches of aorta

Question 8

Splenius Cervicis

Answer 8

A: Extend the neck, laterally flex the neck, rotate the face toward

I: Posterior Rami C5-C7

BS: Occipital artery and transverse cervical artery

Question 9

Iliocostalis Lumborum

Answer 9

A: Maintain erect posture, Extend the verterbral column, laterally flex the spine

I: Posterior rami of cervical, thoracic, and lumbar spinal nerve

BS: Posterior intercostal arteries, subcostal arteries, lumbar arteries

Question 10

Illiocostalis Thoracis

Answer 10

A: Maintain erect posture, Extend the verterbral column, laterally flex the spine

I: Posterior rami of cervical, thoracic, and lumbar spinal nerve

BS: Posterior intercostal arteries, subcostal arteries, lumbar arteries

Question 11

Illiocostalis Cervicis

Answer 11

A: Extend the neck, Laterally flex the neck

I: Posterior rami of cervical, thoracic, and lumbar spinal nerve

BS: Occipital artery, posterior intercostal arteries

Question 12

Longissimus Thoracis

Answer 12

A: Maintain erect posture, extend the spine, laterally flex the spine

I: Posterior rami of cervical, thoracic, and lumbar spinal nerves

BS: Posterio intercostal arteries, subcostal arteries, lumbar arteries

Question 13

Longissimus Cervicis

Answer 13

A: Extend the neck, Laterally flex the neck

I: Posterior Rmi of cervical, thoracic, and lumbar spinal nerves

BS: Posterior intercostal arteries

Question 14

Longissimus Capitis

Answer 14

A: Extend the neck, laterally flex the neck

I: Posterior rami of cervical, thoacic, and lumbar spinal nerves

BS: Occipital artery

Question 15

Spinalis Thoracis

Answer 15

A: Maintain erect posture, Extend the spine, Laterally flex the spine

I: Posterior rami of cervical, thoracicand lumbar spinal nerves

BS: Posterior intercostal arteries

Question 16

Spinalis Cervicis

Answer 16

A: Extend the neck, laterally flex the neck

I: Posterior rami of cervical, thoracic, and lumbar spinal nerves

BS: Posterior intercostal arteries

Question 17

Spinalis Capitis

Answer 17

A: Extend the neck, Laterally flex the neck

I: Posterior rami of cervical, thoaracic, and lumbar spinal nerves

BS: Posterior Intercostal arteries

Question 18

Semispinalis Capitis

Answer 18

A: Extend head, rotate face away

I: Posterior rami of cervical

BS: Deep cervical artery, descending branch of occipital artery

Question 19

Semispinalis Cervicis

Answer 19

A: Extend spine, rotate spine away

I: Posterior rami of cervical, thoracic, and lumbar spinal nerves

BS: Deep cervical artery, descending branch of occipital artery, posterior intercostal arteries

Question 20

Semispinalis Thoracis

Answer 20

A: Extend spine, rotate spine away

I: Posterior rami of cervical, thoarcic, and lumbar spinal nerves

BS: Deep cervical artery, descending branch of occipital artery, posterier intercostal arteries

Question 21

Multifidus muscles (Lumborum, thoacis, Cervicis)

Answer 21

A: Extend spine, rotate spine away

I: Posterior rami of cervical, thoracic, and lumbar spinal nerves

BS:

• Cervicis: vertebral artery, occipital artery
• Thoracis: Posterior intercostal arteries
• Lumborum: Lumbar arteries, lateral sacral artery

Question 22

Rotatores Longus muscles (Lumborum, Thoracis, Cervicis)

Answer 22

A: Extend spine, rotate spine away, proprioception

I: Posterior rami of cervical, thoracic, and lumbar spinal branch

BS: Posterior intercostal arteries

Question 23

Rotatores Brevis muscles (lumborum, thoracis, cervicis)

Answer 23

A: Extend spine, rotate spine away, proprioception

I: Posterior rami of cervical, thoarcic, and lumbar spinal nerves

BS: Vertebral artery, occipital artery

Question 24

Interspinalis muscle

Answer 24

A: Extend spine

I: Suboccipital nerve

BS:

• Cervicis: Deep cervical artery
• Lumborum: Lumbar arteries

Question 25

Intertransversarii muscle

Answer 25

A: Laterally flex spine

I: Suboccipital nerve

BS:

-cervical: branches from subclavin arteries

-lumbar: lumbar artereis

Question 26

Rectus Capitis Posterior Major

Answer 26

A: Extend head, rotate the face toward

I: Subocciptal nerve

BS: Vertebral artery, deep descending branch of occipital artery

Question 27

Rectus Capitis Posterior Minor

Answer 27

A: Extend head

I: Suboccipital nerve

BS: Vertebral artery, deep descending branch of occipital artery

Question 28

Obliquus capitis superior

Answer 28

A: Extend head, laterally flex head

I: Subocciptial nerve

BS: Vertebral artery, deep descending branch of occipital artery

Question 29

Obliquus Capitis Inferior

Answer 29

A: Rotate the face toward

I: Suboccipital nerve

BS: Vertebral artery, deep descending branch of occiptial artery