Muscles And Brachial Plexus - Lab Exam 1

71 Questions | Total Attempts: 378

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Brachial Plexus Quizzes & Trivia

Covers the origin, insertion, action and innervation for the muscles of the arm, scapula, superficial back, pectoral. In addition, this quiz covers prominent bone markings of the vertebral column, scapula, sternum, rib & clavicle, radius, ulna, humerus and hand. Provides a review of the shoulder joint and brachial plexus.


Questions and Answers
  • 1. 
    Which of the following branches off of the lateral cord?
    • A. 

      Suprascapular Nerve

    • B. 

      Lateral Pectoral Nerve

    • C. 

      Musculocutaneous Nerve

    • D. 

      Long Thoracic Nerve

  • 2. 
    Which of the following nerves branch off of the posterior cord?
    • A. 

      Upper Subscapular Nerve

    • B. 

      Medial Antebrachial Cutaneous

    • C. 

      Suprascapular

    • D. 

      Thoracodorsal

    • E. 

      Lower Subscapular

    • F. 

      Axillary

    • G. 

      Nerve to the Subclavius

  • 3. 
    Which of the following nerves branches off of the C5 root?
    • A. 

      Long Thoracic Nerve

    • B. 

      Suprascapular Nerve

    • C. 

      Lateral Pectoral Nerve

    • D. 

      Dorsal Scapular Nerve

    • E. 

      A and D

    • F. 

      All of the above

  • 4. 
    Which is the correct order for the "break-up" of the brachial plexus?
    • A. 

      Trunks, Divisions, Roots, Cords, Terminal Branches

    • B. 

      Roots, Trunks, Divisions, Cords, Terminal Branches

    • C. 

      Cords, Roots, Divisions, Trunks, Terminal Branches

  • 5. 
    What is the unique feature of the axillary, upper subscapular, thoracodorsal and lower subscapular nerves?
    • A. 

      They all branch from C8-T1.

    • B. 

      They are all terminal branches of the brachial plexus.

    • C. 

      They all branch of the medial cord.

    • D. 

      They cannot be traced back to their roots exactly.

  • 6. 
    Which of the following nerves does NOT branch off the trunks?
    • A. 

      Suprascapular Nerve

    • B. 

      Dorsal Scapular Nerve

    • C. 

      Nerve to the Subclavius

  • 7. 
    Which of the following are terminal branches of the brachial plexus?
    • A. 

      Musculocutaneous Nerve

    • B. 

      Median Nerve

    • C. 

      Ulnar Nerve

    • D. 

      Axillary Nerve

    • E. 

      Pectoral Nerve

    • F. 

      Radial Nerve

  • 8. 
    The posterior division of the brachial plexus supplies flexor parts of the upper limb.
    • A. 

      True

    • B. 

      False

  • 9. 
    The dorsal scapular nerve DOES NOT innervate which of the following muscles?
    • A. 

      Levator scapulae

    • B. 

      Rhomboid Major and Minor

    • C. 

      Subscapularis

  • 10. 
    The suprascapular nerve innervates which of the following combinations of muscles?
    • A. 

      Teres Major and Minor

    • B. 

      Rhomboid Major and Minor

    • C. 

      Supraspinatus and Infraspinatus

    • D. 

      Levator Scapulae and Subscapularis

  • 11. 
    The Upper Subscapular nerve innervates which of the following muscles?
    • A. 

      Subclavius

    • B. 

      Subscapularis

    • C. 

      Supraspinatus

  • 12. 
    The Lower Subscapular nerve innervates all of the following muscles, except
    • A. 

      Teres Major

    • B. 

      Teres Minor

    • C. 

      Subscapularis

  • 13. 
    Which of the following muscles are innervated by the Axial nerve?
    • A. 

      Teres Major

    • B. 

      Teres Minor

    • C. 

      Rhomboid Major and Minor

    • D. 

      Pectoral Major - Clavicular Head

    • E. 

      Deltoids

  • 14. 
    The Lateral Pectoral nerve innervates which of the following?
    • A. 

      Pectoralis Major - Sternal Head

    • B. 

      Pectoralis Minor

    • C. 

      Pectoralis Major - Clavicular Head

  • 15. 
    Which of the following muscles are innervated by the Musculocutaneous nerve?
    • A. 

      Coracobrachialis

    • B. 

      Biceps Brachii

    • C. 

      Triceps Brachii

    • D. 

      Skin of the Forearm

    • E. 

      Brachialis

    • F. 

      Brachioradialis

  • 16. 
    The Triceps Brachii, Brachioradialis and Anconeus muscles are innervated by which nerve?
    • A. 

      Radial

    • B. 

      Medial

    • C. 

      Ulnar

    • D. 

      Axillary

  • 17. 
    Which of the following muscles is NOT innervated by the Medial Pectoral nerve?
    • A. 

      Pectoralis Major - Clavicular Head

    • B. 

      Pectoralis Major - Sternal Head

    • C. 

      Pectoralis Minor

  • 18. 
    Identify the correct origin for the middle trapezius.
    • A. 

      Ligamentum nuchae

    • B. 

      C7-T3 spinous processes

    • C. 

      Spine of the scapula

    • D. 

      C1-4 transverse processes

  • 19. 
    Choose the correct origin/insertion match for the lower trapezius.
    • A. 

      O: T4-T12 spinous processes I: Spine of the scapula

    • B. 

      O: C5-T10 spinous processes I: Root of the spine of the scapula

    • C. 

      O: T2 - T5 spinous processes I: Acromian of the scapula

    • D. 

      O: T4 - T12 spinous process I: Root of the spine of the scapula

  • 20. 
    Identify the actions performed by the trapezius muscle which are correctly paired with the part of the trapezius (upper, middle, lower).
    • A. 

      Upper - Elevation Lateral (upward) rotation of the scapula

    • B. 

      Upper - Elevation Medial (downward) rotation of the scapula

    • C. 

      Middle- Adduction (retraction) of the scapula

    • D. 

      Middle - Adduction (retraction) of the scapula Depression of the scapula

    • E. 

      Lower - Depression of the scapula Lateral (upward) rotation of the scapula

    • F. 

      Lower - Elevation of the scapula Medial (downward) rotation of the scapula

  • 21. 
    Identify the origin for the Levator Scapula.
    • A. 

      C1-4 transverse processes

    • B. 

      C1 - 7 transverse processes & Ligamentum nuchae

    • C. 

      C1 - 7 transverse processes

    • D. 

      C2 - 6 transverse processes

  • 22. 
    Identify the correct insertion for the Levator Scapula.
    • A. 

      Vertebral border of scapula and spine of scapula

    • B. 

      Vertebral border of scapula from superior angle to root of spine

    • C. 

      Vertebral border of scapula from superior angle to inferior angle

    • D. 

      Axillary border and acromion process

  • 23. 
    Correctly identify the actions of the Levator Scapula.
    • A. 

      Elevation

    • B. 

      Medial (downward) rotation of the scapula

    • C. 

      Lateral (downward) rotation of the scapula

    • D. 

      Adduction (retraction) of the scapula

    • E. 

      Assists in forced exhalation

  • 24. 
    Choose the statement that correctly describes the action of the Rhomboids.
    • A. 

      Rhomboid Major and Minor have the same actions: Adduction (retraction) of the scapula & Medial (downward) rotation

    • B. 

      Rhomboid Major and Minor have the same actions: Adduction (retraction) of the scapula, Lateral (downward) rotation and Elevation

    • C. 

      Rhomboid Major performs Adduction (retratction), while Rhomboid Minor performs Medial (downward) rotation

    • D. 

      Rhomboid Major performs Adduction (retraction) and Elevation, while Rhomboid Minor performs Medial (downward) rotation

  • 25. 
    Where do Rhomboid Major and Minor insert?
    • A. 

      Vertebral border of the scapula from the root of the spine to inferior angle

    • B. 

      Superior angle of the scapula

    • C. 

      Spine of the scapula

    • D. 

      Root of the spine of the scapula

    • E. 

      Rhomboid Major inserts at (A) and Rhomboid Minor inserts at (D)

    • F. 

      Rhomboid Major inserts at (B) and Rhomboid Minor inserts at (C)

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