Muscles of the Back (Quiz 3)

Question 1

The muscles of the superficial layer of the back (4)

Answer 1

• Trapezius
• Latissimus Dorsi
• Levator Scapula
• Rhomboids

Question 2

The muscles of the intermediate layer of the back (2)

Answer 2

• Serratus Posterior Superior
• Serratus Posterior Inferior

Question 3

3 Layers of the deep muscle of the back

Answer 3

1. Superficial
2. Intermediate
3. Deep

Question 4

Muscles of the superficial layer of the deep back muscles (2)

Answer 4

1. Splenius Capitus
2. Splenius Cervicis

Question 5

Muscles of the intemediate layer of the Deep back muscles (3)

Answer 5

1. Spinalis
2. Longissimus
3. Iliocostalis

Question 6

5 muscles of the deep layer of the Deep back muscles

(3 Superomedial fibre direction, 2 Verticle fibre direction)

Answer 6

• Superomedial Fibre Direction

1. Semispinalis
2. Multifidus
3. Rotatores

• Vertical Fibre Direction

1. Interspinales
2. Intertransversarii

Question 7

2 muscles of the posterior Thorax

Accessory muscles of respiration

Answer 7

1. Serratus Posterior Superior
2. Serratus Anterior Superior

Question 8

Group of back muscles that help to maintain posture and move the spine and head

Answer 8

Deep muscles (intrinsic muscles)

Question 9

The 3 columns of muscles in the intermediate layer of the deep muscles of the back are collectively called?

Answer 9

The Erector Spinae Muscles

Aka Paraspinals

Question 10

3 muscles in the deep layer of the back that have a superomedial fibre direction

Collectively called the Transversospinalis muscles

Answer 10

1. Semispinalis
2. Multifidus
3. Rotatores

Question 11

2 muscles in the deep layer of the back that have a verticle fibre direction

Answer 11

1. Interspinals
2. Intertransversarii

Question 12

The groove between the Spinous process and the Transverse processes

Answer 12

Laminar Groove

Question 13

Muscles found in the Laminar Groove

They attach from the TVPs to the SPs (of the superior vertebrae)

Answer 13

• Semispinalis
• Multifidus
• Rotatores

(Superomedial fibre direction, Deep layer of the deep back muscles)

Question 14

Muscle deep to rhomboids, and superficial to erector spinae

Answer 14

Serratus Posterior Superior

Question 15

Muscle deep to Latissimus Dorsi/Thoracolumbar Fascia, and superficial to the Erector Spinae muscles

Answer 15

Serratus Posterior Inferior

Question 16

Medial Attachment: SPs of C7-T3

Lateral Attachment: Superior borders of ribs 2-5

Supermedial Fibre direction

Action: Elvation of ribs 2-5 (with forced inhalation)

Answer 16

Serratus Posterior Superior

Question 17

Medial Attachment: SPs of T11-L2

Lateral Attachment: Lower 4 ribs (12-8)

Inferomedial fibre direction

Action: Draws ribs down and back (w/ forced expiration)

Answer 17

Serratus Posterior Inferior

Question 18

Inferior Attachment: SPs of C4-T2

Superior Attachment: Mastiod process and lateral superior nuchal line

Action (Unilateral Contraction): Ipsilateral rotation

Action (Bilateral Contraction) Extension of the Neck

Answer 18

Splenius Capitis

Question 19

Inferior Attachment: SPs of T3-T5

Superior Attachment: C1-C4 TVPs

Action (unilateral contraction): Ipsilateral Rotation

Action (bilateral contraction): Extension of the neck

Answer 19

Splenius Cervicis

Question 20

Muscles that arise inferiorly from the Thoracolumbar fascia

Spread out in a superolateral direction

Subdivided into 3 columns of muscle on either side of the spine

(each column has 3 segments)

Answer 20

Intermediate layer of the Deep back muscles

Question 21

The Muscles of the intermediate layer of the Deep back muscles, from medial to lateral

Answer 21

• Spinalis
• Longissimus
• Iliocostlis

Question 22

A very thin muscle

Sits in the the Laminar Groove

Attaches to SPs

Answer 22

Spinalis

Question 23

3 regions spinalis passes through

Answer 23

Thoracis (upper T-spine)

Cervicis

Capitis

Question 24

Longest Column of the erector spinae

Attaches to TVPs

Answer 24

Longissimus

Question 25

3 regions that Longissimus passes through

Answer 25

Throacis (T-Spine TVPs) Cervicis (C-Spine TVPs) Capitis (Mastiod Process)

Question 26

Most lateral of the Erector Spinae muscles Attaches to the angles of the ribs

Answer 26

Iliocostalis

Question 27

3 regions Iliocostalis passes through

Answer 27

Lumborum (ribs 12-8) Thoracis (ribs 7-1) Cervicis (TVPs of C3-C6)

Question 28

Actions of all erector spinae muscles 1. unilateral 2. bilateral

Answer 28

1. Lateral flexion of the vertebral column 2. Extension of the Vertebral column

Question 29

Deep muscle that covers 1/2 of the spinal cord (skips 3-6 vertebrae) Attaches superiorly to the occipital bone between the superior and inferior nuchal lines Largest mass in the posterior neck Action (unilateral contraction): Contralateral rotation of the neck Action (bilateral contraction): Extension of the head/neck

Answer 29

Semispinalis

Question 30

Deep muscle from S4-C2 (skipping 1-3 vertebrae) Only muscle whose fibres run across the posterior sacrum Actions (unilateral contraction): Lateral flexion, Contralateral rotation Actions (bilateral contraction): Extension of the spine, stabilization

Answer 30

Multifidus

Question 31

Deepest muscle in the Laminar groove Attaches TVPs to SP above Action (unilateral contraction): Contralateral rotation Action (bilateral contraction): Stabilization

Answer 31

Rotatores | (Longus and Brevis)

Question 32

Rotatores muscle that skips 1 vertebra ex. TVP of C6 to SP of C4

Answer 32

Rotatores Longus

Question 33

Rotatores muscle that attaches to the next highest vertebra Ex. TVP of C6 to SP of C5

Answer 33

Rotatores Brevis

Question 34

A paired muscle (on either side of cervical and lumbar SPs) of the deep layer of the Deep back muscles Has a vertical fibre direction Action: extension (small movement)

Answer 34

Interspinales

Question 35

A muscle of the deep layer of the Deep back muscles Attaches TVPs of adjacent vertebrae of the cervical and lumbar spine Has a Verticle fibre direction Action: lateral flexion (small movement)

Answer 35

Intertransversarii