Abdominal Wall Muscles Flashcards by Rhiannon Heath | Brainscape

Q

Layers of the abdominal wall

A

Skin

Fascia or fat

superficial
deep

External oblique

Internal oblique

Transverse abdominus

Rectus abdominus in midline

Transversalis fascia

Peritoneum

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Q

Actions of the external oblique

A

Compress the abdominal viscera

Flex the trunk

Rotates the trunk

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Q

What does the external oblique aponeurosis form

A

Inguinal ligament

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Q

Origin of external oblique

A

Ribs 5 - 12

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Q

Insertions of external oblique

A

Iliac crest and pubic tubercle

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Q

Function of the internal oblique

A

Flex the trunk

Rotation ipsilaterally

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Q

Origin of internal oblique

A

Inguinal ligament

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Q

Insertions of internal oblique

A

Ribs 10 - 12

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Q

Directions of external and internal oblique

A

The muscle fibres run in opposite directions

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Q

Function of transverse abdominus

A

Compression of abdominal viscera

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Q

Origins of transverse abdominus

A

Costal cartilage of ribs 7 - 12

Thoracolumbar fascia

Inguinal ligament

Iliac crest

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Q

Insertions of the transverse abdominus

A

Linea Alba

Pubic crest

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Q

Nerve supply of the abdominal wall muscles

A

External oblique - T7 - T12

Internal oblique and transverse abdominus - T7 - L1

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Q

Function of Rectus abdominus

A

Helps compress the abdominal viscera

Stabilises the pelvis during walking

Depresses the ribs

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Q

Origin of rectus abdominus

A

Pubic crest

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Q

Insertions of rectus abdominus

A

Sternum

Costal cartilage of ribs 5 -7

Q

What is the rectus sheath

A

The aponeurosis surrounding the rectus abdominus

Q

What is the accurate line

A

Half way between the umbilicus and the pubic symphysis