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Gross Anatomy > Abdominals > Flashcards

Abdominals Flashcards

1
Q

What is rectus abdominis deep to above the arcuate line?

A

Deep to aponeurosis of EO

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2
Q

What is rectus abdominis deep to below the arcuate line?

A

Aponeurosis of EO/IO/TVA

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3
Q

O/I Quadratus Lumborum

A

O: Iliac Crest - internal lip
I: 12th rib - L1-L4 TPs

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4
Q

O/I Rectus Abdominis

A

O: Pubic Symphysis/Pubic Crest
I: Ribs 5/6/7 costal cartilages - xiphoid process

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5
Q

O/I External Oblique

A

O: Rib 5-12
I: Anterior Iliac Crest
Linea Alba
Pubis

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6
Q

O/I Internal Oblique

A 
O: Inguinal Ligament
      Anterior Iliac Crest
     Thoracolumbar Aponeurosis
I: Ribs 9-12
   Abdominal aponeurosis
   Linea Alba
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7
Q

O/I Transversus Abdominis

A 
O: Inguinal Ligament
     Iliac Crest
     Thoracolumbar Aponeurosis
     Ribs 7-12 internal surface of costal cartilages
I: Abdominal Aponeurosis
    Linea Alba
   Pubis
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8
Q

O/I Pyramidalis

A

O: Pubic Crest - anterior to origin of rectus abdominis
I: Lower Linea Alba

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9
Q

What is the innervation of pyramidalis?

A

Subcostal Nerve

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10
Q

What is the innervation of rectus abdominis?

A

Thoracoabdominal nerves T7-11

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11
Q

What is the innervation of external obliques?

A

Thoracoabdominal nerves T7-T11

Subcostal Nerves

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12
Q

What is the innervation of internal obliques?

A

Thoracoabdominal Nerves T7-12, L1

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13
Q

What is the innervation of transversus abdominis?

A

Thoracoabdominal T7-12, L1

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14
Q

What action do all abdominals share (except pyramidalis)?

A

Flexion of the trunk

compression and Support of abdominal viscera

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15
Q

Which abdominal muscles do not perform flexion of the trunk?

A

Transversus Abdominis

Pyramidalis

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16
Q

What are the actions of rectus abdominis?

A

Flexion of trunk

Compression and support of AV (abdominal viscera)

17
Q

What are the actions of the external obliques?

A 
Flexion of the trunk
Compression and support of the AV
-Unilateral actions-
Lateral flexion of the trunk
Rotation of the trunk to the opposite side
18
Q

What are the actions of the internal obliques?

A 
Flexion of the trunk
Compression and support of the AV
-Unilateral actions-
Lateral flexion of the trunk
Rotation of the trunk to the same side
19
Q

What are the actions of the transversus abdominis?

A

Compression and support of the AV

20
Q

What is the action of the pyramidalis?

A

Reinforces lower rectus sheath

21
Q

What is the action of the quadratus lumborum?

A

Stabilization of 12th rib during inspiration
-Unilateral actions-
Lateral flexion of the trunk
Elevation of pelvis while thorax and vertebral column is fixed

Gross Anatomy (20 decks)

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