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A&P Quarter 2.2 > Muscles of Eye, Thorax, and Abdominal Wall > Flashcards

Muscles of Eye, Thorax, and Abdominal Wall Flashcards

1
Q

Which muscle moves the eye up?

A

Superior rectus

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2
Q

Which muscle moves the eye down?

A

Inferior rectus

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3
Q

Which muscle moves the eye laterally?

A

Lateral rectus

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4
Q

Which muscle moves the eye medially?

A

Medial rectus

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5
Q

How does the superior oblique move the eye?

A

Rotates the eye down, and lateral

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6
Q

How does the inferior oblique move the eye?

A

Rotates the eye up and lateral

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7
Q

How is the superior oblique innervated?

A

By CN IV, Trochlear

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8
Q

How is the lateral rectus innervated?

A

By CN VI, Abducens

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9
Q

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

A

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

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10
Q

What muscles are used for inspiration (generally)?

A

The diaphragm and external intercostals

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11
Q

What is used for normal expiration?

A

The “elastic recoil” of elastic fibers within lung tissue

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12
Q

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

A

Phrenic nerve

Cervical plexus

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13
Q

What shape is the diaphragm?

A

A large, dome-shaped muscle

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14
Q

The diaphragm is the between the ________ and _______ cavities.

A

Thoracic

Abdominal

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15
Q

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

A

Flattens

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16
Q

What is the prime mover of inspiration?

A

The diaphragm

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17
Q

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

A

11

18
Q

The external intercostals help inspiration or expiration?

A

Inspiration

19
Q

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

A

Ribs

20
Q

Where is the scalenes?

A

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

21
Q

What does the scalenes do upon inspiration?

A

Elevates ribs 1 and 2

22
Q

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

A

Flex head and rotate neck

23
Q

What do the internal intercostals do?

A

Depress ribs

24
Q

The internal intercostals are ______ to the external intercostals

A

Deep

25
Q

The internal intercostals are synergistic with the _____ _______.

A

Quadratus lumborum

26
Q

What are the origin and insertion of the quadratus lumborium?

A

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

27
Q

How is the quadratus lumborium a fixator?

A

It fixes rib 12

28
Q

How is the quadratus lumborium an extensor?

A

When not used for breathing, can bilaterally extend spine

29
Q

What happens if the quadratus lumborium is flexed ipsilaterally?

A

Lateral flex

30
Q

When are the muscles of the abdominal wall used?

A

During forced expiration

31
Q

What does the rectus abdominis do?

A

Depresses ribs, flexes spine, and compresses abdomen

32
Q

The rectus abdominis is segmented by ______ ______.

A

Tendinous intersections

33
Q

What are the tendinous intersections of the rectus abdominis?

A

The lines that give a 6 pack

34
Q

Where does the rectus abdominis go?

A

From the rib cage to the pubic crest

35
Q

What does the external abdominal oblique do?

A

Depresses ribs, flexes spine, and compresses abdomen

36
Q

How do the fibers of the external abdominal oblique run?

A

Diagonally, like external intercostals (think hands in pockets)

37
Q

What does the internal abdominal oblique do?

A

Depresses ribs, flexes spine, and compresses abdomen

38
Q

How do the fibers of the internal abdominal oblique run?

A

Diagonally, like internal intercostals

39
Q

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

A

Deep

40
Q

What does the transversus abdominis do?

A

Compresses abdomen

41
Q

How do the fibers of the transverses abdominis run?

A

Horizontally

42
Q

What is the linea alba?

A

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

A&P Quarter 2.2 (22 decks)

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