Abdominal muscles Flashcards by C L

Q

Origin of quadratus lumborum

A

Inferior border of 12th rib

- Transverse process of lumbar vertebrae

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Q

Insertion of quadratus lumborum

A

Iliolumbar ligament

- Iliac crest

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Q

Action of quadratus lumborum

A

Fixes 12th rib during inspiration

- Lateral flexion/extension of vertebral column

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Q

Innervation of quadratus lumborum

A

T12-L4

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Q

Origin of psoas major

A

Transverse processes of lumbar vertebrae

- Bodies of T12-L4 and IV disks

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Q

Action of psoas major

A

Flexion of thigh (with iliacus)
Flexion of trunk (with iliacus)
Lateral flexion of vertebral column

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Q

Innervation of psoas major

A

L1-3

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Q

Origin of psoas minor

A

Bodies of T12-L1

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Q

Insertion of psoas major

A

Lesser trochanter

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Q

Insertion of psoas minor

A

Pectineal line

- Iliopectineal eminence

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Q

Innervation of psoas minor

A

L1

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Q

Origin of iliacus

A

Iliac fossa
Iliac crest
Anterior sacroiliac ligament

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Q

Insertion of iliacus

A

Lesser trochanter

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Q

Action of iliacus

A

Flexion of thigh

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Q

Innervation of iliacus

A

Femoral nerve

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Q

Origin of rectus abdominis

A

Pubic crest

- Pubic symphysis

Q

Insertion of rectus abdominis

A

5th-7th CC

- Xiphoid process

Q

Action of rectus abdominis

A

Stabilises pelvis during gait

Q

Origin of internal oblique

A

Thoracolumbar fascia
Iliac crest (anterior 2/3)
Lateral 2/3 of inguinal ligament

Q

Insertion of internal oblique

A

Inferior 3-4 ribs
Linea alba
Xiphoid process
Pubic crest

Q

Innervation of internal oblique

A

Iliohypogastric (L1) nerve

Q

Origin of transversus abdominis

A

Thoracolumbar fascia
Iliac crest
Lateral 1/3 of inguinal ligament
Inferior 6 ribs + CCs

Q

Insertion of transversus abdominis

A

Linea alba
Xiphoid process
Pubic crest

Q

Innervation of transversus abdominis

A

Iliohypogastric (L1) nerve