Muscles Of Axial Skeleton Lesson Nine

Front 1

Name 8 muscles involved with inspiration

Back 1

Pectoralis minor
Scalenes (3)
Sternocleidomastoid
Diaphragm
External intercostal
Serratus posterior superior

Front 2

Name 6 muscles involved with expiration

Back 2

Abdominals (forced exhale)
Internal Intercostal
Serratus Posterior Inferior

Front 3

Name the muscles of pulmonary respiration (10) (not including abdominals)

Back 3

Diaphragm
Internal Intercostal
External Intercostal
Serratus Posterior Superior
Serratus Posterior Inferior
Pectoralis Minor
Scalenes (3)
Sternocleidomastoid
(3 scalenes;2 serratus; 2 intercostals; diaphragm, pec minor and SCM)

Front 4

When are the abdominal muscles involved in breathing?

Back 4

In forced expiration

Front 5

Diaphragm means what?

Back 5

"a partition"

Front 6

The Diaphragm divides what two cavities?

Back 6

Abdominal and Thoracic cavities

Front 7

The Diaphragm has what three portions because of its origins?

Back 7

lumbar
costal
sternal

Front 8

What muscle is the prime mover of inspiration (inhaling)?

Back 8

Diaphragm

Front 9

Diaphragm ORIGIN (3)=

Back 9

L1-L3
lower six costal cartilages (drumhead)
xiphoid process

Front 10

Diaphragm INSERTION (1)

Back 10

central tendon (cloverleaf-shaped aponeurosis)

Front 11

The fiber direction of the Internal Intercostals is the same as which abdominal muscle?

Back 11

Internal Oblique

Front 12

The Internal Intercostals help with inspiration or expiration primarily? How?

Back 12

They depress the ribcage during expiration and maintain intercostal spaces.

Front 13

The External Intercostals help with inspiration or expiration primarily? How

Back 13

They elevate the ribcage during inspiration and maintain intercostal spaces.

Front 14

During inspiration, does the ribcage go up or down?

Back 14

up

Front 15

During expiration, does the ribcage go up or down?

Back 15

down

Front 16

Internal Intercostal ORIGIN=

Back 16

superior border of rib (below)

Front 17

Internal Intercostal INSERTION=

Back 17

inferior border of rib (above)

Front 18

The fiber direction of the External Intercostals is the same as what abdominal muscle?

Back 18

External Oblique

Front 19

External Intercostal ORIGIN=

Back 19

inferior border of rib (above)

Front 20

External Intercostal INSERTION=

Back 20

superior border of rib (below)

Front 21

Which two muscles aid in the process of labored breathing and are located on the back?

Back 21

Serratus Posterior Superior and Serratus Posterior Inferior

Front 22

What are the deepest intercostal muscles called? What is their main purpose?

Back 22

Internal Intercostals which depress the ribcage when we exhale

Front 23

What does "serratus" mean?

Back 23

Notched or jagged, as a saw

Front 24

Are the Serratus Posterior Superior muscles located beneath or above the rhomboids?

Back 24

Deep to the rhomboids

Front 25

Serratus Posterior Superior ORIGIN (2)

Back 25

nuchal ligament
SP of C7-T3 (spinous processes of C7 and upper thoracic vertebrae)

Front 26

Serratus Posterior Superior INSERTION (1)

Back 26

ribs 2- 5 (posterior surfaces)

Front 27

Serratus Posterior Inferior has what main action?

Back 27

Depresses ribs during expiration (ribs 9-12 are the insertions)

Front 28

Serratus Posterior Inferior ORIGIN=

Back 28

SP of T11-L2
spinous processes of vertebrae Thoracic 11 down to Lumbar 2.

Front 29

The Intercostal muscle which inserts on the rib below is the...

Back 29

External Intercostal

Front 30

The Intercostal muscle which inserts on the rib above is the...

Back 30

Internal Intercostal