Human Anatomy: Muscles of the Back
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Questions and Answers

Which nerve is responsible for the nerve supply to the latissimus dorsi?

  • Thoracodorsal nerve (correct)
  • Suprascapular nerve
  • Long thoracic nerve
  • Dorsal scapular nerve

What is the primary action of the latissimus dorsi muscle?

  • Flexion of the hip
  • Extension of the forearm
  • Adduction and medial rotation of the arm (correct)
  • Elevation of the scapula

What is the insertion point of the levator scapulae muscle?

  • Inferior angle of the scapula
  • Superior angle of the scapula
  • Medial border of the scapula above the spine (correct)
  • Lateral border of the scapula

Which muscles are primarily involved in retracting the scapula?

<p>Rhomboideus major and minor (A)</p> Signup and view all the answers

What is the origin of the rhomboideus major muscle?

<p>T2 to T5 vertebrae (B)</p> Signup and view all the answers

What is the primary action of the pectoralis major muscle?

<p>Adduction and medial rotation of the arm (C)</p> Signup and view all the answers

Which muscles are part of the superficial layer of the back?

<p>Latissimus dorsi and trapezius (B)</p> Signup and view all the answers

What is the nerve supply for the pectoralis minor muscle?

<p>Medial pectoral nerve (B)</p> Signup and view all the answers

Which of the following actions is primarily associated with the trapezius muscle's upper fibers?

<p>Elevate the shoulder (C)</p> Signup and view all the answers

Apart from its role in scapula movement, what is another function of pectoralis minor?

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

What is the insertion point of the subclavius muscle?

<p>Clavicle (subclavius groove) (D)</p> Signup and view all the answers

Which muscles are included in the deep layer of the back?

<p>Rhomboideus major and minor (C)</p> Signup and view all the answers

What are the origins of the pectoralis major muscle?

<p>Front of sternum and clavicle (D)</p> Signup and view all the answers

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