Intermediate & Deep (Intrinsic) Muscles of the Back

Question 1

Intermediate Back Muscles

Answer 1

This group of muscles acts with the respiratory system

Question 2

Deep (intrinsic; true muscles of the Spine)

Answer 2

This group of muscles act mainly on the Spine

Question 3

Serratus posterior superior: Origin

Answer 3

Inferior aspect of ligamentum nuchae

SPs of C7-T3

Question 4

Serratus posterior superior: Insertion

Answer 4

Ribs 2-5 lateral to their angles

Question 5

Serratus posterior superior: Action

Answer 5

Elevates upper ribs

Question 6

Serratus posterior superior: Nerve

Answer 6

Intercostals T2-T4

Question 7

Serratus posterior inferior: Origin

Answer 7

SPs of T11-L2

Supraspinous ligaments of T11-L2

Question 8

Serratus posterior inferior: Insertion

Answer 8

Ribs T9-T12 lateral to their angles

Question 9

Serratus posterior inferior: Action

Answer 9

Draws ribs outward & downward (opposed inward pull of diaphragm)

Question 10

Serratus posterior inferior: Nerve

Answer 10

Intercostals T9-T11

Subcostal T12

Question 11

Muscle groups of Intrinsic back muscles

Answer 11

1. Splenius group (Spinotransversalis)
2. Erector Spinae group (Sacrospinalis)
3. Transversospinalis group

Question 12

Splenius group: (Spinotransversalis)

Answer 12

Splenius capitis

Splenius cervicis

Question 13

Erector Spinae Group (Sacrospinalis) of the Deep Back:

Answer 13

Iliocostalis group

Longissimus group

Spinalis group

“I Love Spines!”

Question 14

Transversospinalis Muscle Groups:

Answer 14

1. Semispinalis group
2. Multifidus group
3. Rotatores group
4. Interspinal & Intertransveral group
5. Levator costorum muscle group
6. Suboccipital Muscle group