Muscles of Eye, Thorax, and Abdominal Wall

Question 1

Which muscle moves the eye up?

Answer 1

Superior rectus

Question 2

Which muscle moves the eye down?

Answer 2

Inferior rectus

Question 3

Which muscle moves the eye laterally?

Answer 3

Lateral rectus

Question 4

Which muscle moves the eye medially?

Answer 4

Medial rectus

Question 5

How does the superior oblique move the eye?

Answer 5

Rotates the eye down, and lateral

Question 6

How does the inferior oblique move the eye?

Answer 6

Rotates the eye up and lateral

Question 7

How is the superior oblique innervated?

Answer 7

By CN IV, Trochlear

Question 8

How is the lateral rectus innervated?

Answer 8

By CN VI, Abducens

Question 9

What is the name of CN III? What does it innervate?

Answer 9

Oculomotor, Sup/Inf Rectus; Medial Rectus, inferior oblique

Question 10

What muscles are used for inspiration (generally)?

Answer 10

The diaphragm and external intercostals

Question 11

What is used for normal expiration?

Answer 11

The “elastic recoil” of elastic fibers within lung tissue

Question 12

How is the diaphragm innervated? (nerve and plexus?)

Answer 12

Phrenic nerve

Cervical plexus

Question 13

What shape is the diaphragm?

Answer 13

A large, dome-shaped muscle

Question 14

The diaphragm is the between the ________ and _______ cavities.

Answer 14

Thoracic

Abdominal

Question 15

The dome (of diaphragm) changes shape this way when we breathe in

Answer 15

Flattens

Question 16

What is the prime mover of inspiration?

Answer 16

The diaphragm

Question 17

How many pairs of external and internal intercostal muscles are there?

Answer 17

11

Question 18

The external intercostals help inspiration or expiration?

Answer 18

Inspiration

Question 19

The external intercostals elevate the _______ with help form the scalenes.

Answer 19

Ribs

Question 20

Where is the scalenes?

Answer 20

In general, form transverse processes of c-vertebrae to ribs 1,2

Question 21

What does the scalenes do upon inspiration?

Answer 21

Elevates ribs 1 and 2

Question 22

What happens if only one side of the scalenes is used?

Answer 22

Flex head and rotate neck

Question 23

What do the internal intercostals do?

Answer 23

Depress ribs

Question 24

The internal intercostals are ______ to the external intercostals

Answer 24

Deep

Question 25

The internal intercostals are synergistic with the _____ _______.

Answer 25

Quadratus lumborum

Question 26

What are the origin and insertion of the quadratus lumborium?

Answer 26

Iliac crest to transverse processes of L1-L4 and rib 12

Question 27

How is the quadratus lumborium a fixator?

Answer 27

It fixes rib 12

Question 28

How is the quadratus lumborium an extensor?

Answer 28

When not used for breathing, can bilaterally extend spine

Question 29

What happens if the quadratus lumborium is flexed ipsilaterally?

Answer 29

Lateral flex

Question 30

When are the muscles of the abdominal wall used?

Answer 30

During forced expiration

Question 31

What does the rectus abdominis do?

Answer 31

Depresses ribs, flexes spine, and compresses abdomen

Question 32

The rectus abdominis is segmented by ______ ______.

Answer 32

Tendinous intersections

Question 33

What are the tendinous intersections of the rectus abdominis?

Answer 33

The lines that give a 6 pack

Question 34

Where does the rectus abdominis go?

Answer 34

From the rib cage to the pubic crest

Question 35

What does the external abdominal oblique do?

Answer 35

Depresses ribs, flexes spine, and compresses abdomen

Question 36

How do the fibers of the external abdominal oblique run?

Answer 36

Diagonally, like external intercostals (think hands in pockets)

Question 37

What does the internal abdominal oblique do?

Answer 37

Depresses ribs, flexes spine, and compresses abdomen

Question 38

How do the fibers of the internal abdominal oblique run?

Answer 38

Diagonally, like internal intercostals

Question 39

The internal abdominal oblique is _______ to the external abdominal oblique.

Answer 39

Deep

Question 40

What does the transversus abdominis do?

Answer 40

Compresses abdomen

Question 41

How do the fibers of the transverses abdominis run?

Answer 41

Horizontally

Question 42

What is the linea alba?

Answer 42

A tendinous line that runs from sternum to pubic symphysis, midline, not muscle