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Anatomy: Abdomen (Dave's notes) > Muscles of the posterior abdominal wall (Daves notes only) > Flashcards

Muscles of the posterior abdominal wall (Daves notes only) Flashcards

1
Q

What are the four muscles of the posterior abdominal wall

A

Psoas major, psoas minor, quadratus lumborum, iliacus

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2
Q

What is the origin of psoas major?

A

Transverse process of L1-L5, bodies of T12-L5 and intervertebral discs of T12-L4

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3
Q

What is the insertion of psoas major?

A

Middle surface of lesser trochanter of femur

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4
Q

What is the action of psoas major?

A

Flexes hip

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5
Q

What is the innervation of psoas major?

A

Anterior primary rami of L1,2

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6
Q

What is the blood supply of psoas major?

A

xxxxx?

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7
Q

What anatomic finding of note occurs within ??psoas?

A

The lumbar plexus lies within

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8
Q

What is the origin of psoas minor?

A

Bodies of T12-L1 and intervening intervertebral discs

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9
Q

What is the insertion of psoas minor?

A

Pectineal line of pubis and fascia over iliopsoas

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10
Q

What is the action of psoas minor?

A

Weak flexor of trunk

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11
Q

What is the innervation of psoas minor?

A

Anterior primary rami of L1

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12
Q

What is the origin of quadratus lumborum?

A

Inferior border of 12th rib

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13
Q

What is the insertion of quadratus lumborum?

A

Apices of transverse process of L1-4, iliolumbar ligament and posterior third of iliac crest

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14
Q

What is the action of quadratus lumborum?

A

Fixes 12th rib during respiration laterally flexes trunk

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15
Q

What is the innervation of quadratus lumborum?

A

Anterior primary rami of T12-L3

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16
Q

In which compartment is quadratus lumborum?

A

QL lies in the anterior compartment of the lumbar fascia

17
Q

What is the origin of iliacus?

A

Iliac fossa within the abdomen

18
Q

What is the insertion of iliacus?

A

Lowermost surface of lesser trochanter of femur

19
Q

What is the action of iliacus?

A

Flexes hip

20
Q

What is the innervation of iliacus?

A

Femoral nerve in the abdomen L2, L3

Anatomy: Abdomen (Dave's notes) (33 decks)

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