Anatomy Quiz: Rectus Abdominis Innervation
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Questions and Answers

Which nerve innervates the rectus abdominis muscle?

  • Phrenic nerve
  • Iliohypogastric nerve
  • Intercostal nerves (correct)
  • Femoral nerve

Which nerve is NOT part of the innervation of the external obliques?

  • Iliohypogastric nerve
  • Ilioinguinal nerve
  • Thoracoabdominal nerve
  • Femoral nerve (correct)

What is the nerve root for the rectus abdominis innervated by the subcostal nerve?

  • T6
  • T7 (correct)
  • T8
  • T12

What are the primary actions of the transversus abdominis?

<p>Stabilizes the pelvis and lower back (B), Compresses the abdominal contents (C)</p> Signup and view all the answers

Which of the following are actions of the internal obliques? (Select all that apply)

<p>Flexion of the trunk (A), Rotation of the trunk contralaterally (B), Rotation of the trunk ipsilaterally (C)</p> Signup and view all the answers

What are the primary nerve roots that innervate the internal obliques and intercostal muscles?

<p>T7-T11 (A)</p> Signup and view all the answers

Which muscle structure is NOT part of the abdominal muscles?

<p>Pectoralis Major (D)</p> Signup and view all the answers

Which muscle structure does NOT include the action of pelvic-trunk rotation?

<p>Iliopsoas (D)</p> Signup and view all the answers

Which action do the rectus abdominis, external obliques, and internal obliques share?

<p>Flexion of the lumbar spine (A)</p> Signup and view all the answers

What is the muscle structure innervated by the ilioinguinal nerve at the T12 and L1 nerve roots?

<p>Transverse Abdominis (C)</p> Signup and view all the answers

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