Anterior Abdominal Wall Muscles Flashcards

1
Q

Where are the Origins of the Transverse Abdominis?

A

Thoracolumbar Fascia and the cartilage of the lower six ribs and iliac crest

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2
Q

Where is the Insertion of the Transverse Abdominis?

A

Linea Alba

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3
Q

What Joints does the Transverse Abdominis cross?

A

Intervertebral joints of lumbar vertebrae

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4
Q

What are the Actions of the Transverse Abdominis?

A

Compression of abdominal cavity and increasing abdominal pressure. Stabilises lumbar spine by creating tension through the TFL and increasing intra-abdominal pressure (IAP).

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5
Q

Where are the Origins of the Rectus Abdominis?

A

Pubis and Symphysis Pubis

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6
Q

Where are the Insertions of the Rectus Abdominis?

A

Cartilages of ribs 5-7 & base of Sternum

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7
Q

What Joints does the Rectus Abdominis cross?

A

Intervertebral joints of lumbar & thoracic vertebrae

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8
Q

Wat is the Action of the Rectus Abdominis?

A

Flection of the vertebral column

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9
Q

Where is the Origin of the External Obliques?

A

Outer surface of the bottom 8 ribs

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10
Q

Where are the Insertions of the External Obliques?

A

Mainly Linea Alba, also Iliac Crest

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11
Q

What joints do the External Obliques cross?

A

Bilaterally: flexion of the vertebral column and tilts the pelvis posteriorly. Unilaterally: rotation and lateral flexion (in combination with the internal obliques)

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12
Q

Where are the Origins of the Internal Obliques?

A

Thoracolumbar Fascia & the Iliac Crest

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13
Q

Where are the Insertions of the Internal Obliques?

A

Linea Alba & bottom three ribs

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14
Q

What joints do the Internal Obliques cross?

A

Intervertebral joints of the lumbar and lower thoracic vertebrae

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15
Q

What are the Actions of the Internal Obliques?

A

Bilaterally – flexion of the vertebral column. Unilaterally – rotation and lateral flexion (in combination with the external obliques). Stabilises lumbar spine by creating tension through the TLF

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