1. Intro + Intrinsic Muscles of Back

Question 1

Muscles of Back

Identity 1 - 2

Answer 1

1. Splenius capitis muscle
2. Splenius cervicis muscle

Question 2

Muscles of Back

Identity 3 - 5

Answer 2

3. Rhomboid minor muscle (cut)
4. Serratus posterior superior muscle
5. Rhomboid major muscle (cut)

Question 3

Muscles of Back

Identity 8

Answer 3

8 Thoracolumbar fascia

Question 4

Muscles of Back

Identity 9

Answer 4

9 Latissimus dorsi muscle

Question 5

Muscles of Back

Identity 10

Answer 5

10 Trapezius muscle

Question 6

Muscles of Back

Extrinsic muscles of the back are really concerned with movements of ___ and ____

Answer 6

the upper limb or of the rib cage

Question 7

Muscles of Back

List extrinsic muscles?

Answer 7

1. The trapezius
2. latissimus dorsi
3. levator scapulae
4. rhomboid major and minor
5. serratus posterior superior and inferior muscles

Question 8

Muscles of Back

The trapezius, latissimus dorsi, levator scapulae, rhomboid major and minor, and serratus posterior superior and inferior muscles are extrinsic muscles.

→ All of these muscles are concerned with movements of the upper limb except ___, which move the rib cage.

Answer 8

the serratus muscles

Question 9

Muscles of Back

Which muscles are true intrinsic back muscles?

Answer 9

The erector spinae muscles

Question 10

Intrinsic Muscles of Back: Superficial Layers

Identify 1 - 2

Answer 10

1. Splenius capitis muscle
2. Splenius cervicis muscle

Question 11

Intrinsic Muscles of Back: Superficial Layers

Identify 1 - 2

Answer 11

1. Splenius capitis muscle
2. Splenius cervicis muscle

Question 12

Intrinsic Muscles of Back: Superficial Layers

Identify 3 - 6

Answer 12

3 Semispinalis capitis muscle

4 Supraspinatus muscle

5 Teres minor and major muscles

6 Erector spinae muscle

Question 13

Intrinsic Muscles of Back: Superficial Layers

Identify 1 - 2

→ O & I

Answer 13

1. Splenius capitis muscle
2. Splenius cervicis muscle

Origin: arise from the ligamentum nuchae and the spinous processes of the C7-T6 vertebrae (capitis from C7-T3 and cervicis from T3-T6).

Insertion:

• Capitis fibers insert into the mastoid process of the temporal bone and the lateral third of the superior nuchal line of the occipital bone.
• The cervicis fibers ascend to attach to the transverse processes of the C1-C3 vertebrae and the posterior tubercle of C3.

Question 14

Intrinsic Muscles of Back: Superficial Layers

Identify 1 - 2

→ Action

Answer 14

1. Splenius capitis muscle
2. Splenius cervicis muscle

Action:

• Acting with their opposite partners, the splenius capitis and splenius cervicis extend the head and neck.
• Acting unilaterally, they laterally bend the head and neck to the side of the contraction.

Question 15

Intrinsic Muscles of Back: Superficial Layers

Identify 1 - 2

→ Nerve

Answer 15

1. Splenius capitis muscle
2. Splenius cervicis muscle

→ Posterior rami of cervical spinal nerves

Question 16

Intrinsic Muscles of Back: Superficial Layers

Which muscle are deep intrinsic muscles?

Answer 16

The semispinalis capitis and erector spinae muscles

Question 17

Intrinsic Muscles of Back: Superficial Layers

The splenius capitis and splenius cervicis form ____ of intrinsic back muscles.

Answer 17

the superficial layer