PNS Exam 2

  1. Degeneration of the spinal cord inferiorly forms what anatomical structure?
    Filum terminale.
  2. Nerves generally emerge above the cervical vertebrae, except at which level?
    C8: emerges below C7.
  3. Which levels are lumbar punctures taken from?
    L3/4 or L4/5.
  4. Which layer contains trebeculae?
    Arachnoid mater.
  5. Where does the dural sac (spinal dura) end?
    At S2.
  6. What ligament is an extension of the dural sac?
    Coccygeal ligament.
  7. True or false: ventral rootlets are generally motor.
  8. Which levels contain the lumbar cistern?
    L2 - S2.
  9. Ventral rootlets:
    • Innervate muscles & skin of the anterior trunk.
    • Carry autonomic innervations.
    • Are bigger than dorsal rami.
  10. What is an a/k/a for nerve root compression?
    • Radiculopathy.
    • Pain in muscles.
    • Paresthesia.
    • Cutaneous sensory loss.
    • Motor weakness.
    • Loss of tendon reflexes.
  11. True or false: brachial plexus roots consist of anterior rami.
    • True.
    • Passing between the anterior & middle scalenes.
  12. Dorsal scapular nerve (C4, C5):
    • Pierces the middle scalene.
    • Innervates rhomboid minor/major, & levator scapula.
  13. Long thoracic nerve (C5, C6, C7):
    Innervates serratus anterior.
  14. The superior trunk gives off which nerves?
    • 1. Nerve to the subclavius.
    • 2. Suprascapular nerve.
  15. Which cord does the inferior (lower) trunk make up?
    Medial cord.
  16. Which cord is the anterior division of the superior & middle trunks?
    The lateral cord.
  17. Does the lateral pectoral nerve (C5, C6, C7) supply pectoralis major or pectoralis minor?
    Pectoralis major.
  18. Which muscle is pierced by the musculocutaneous nerve (C5, C6, C7)?
    • Coracobrachialis: innervates the muscles of the anterior arm, & skin of the lateral forearm.
    • Passes between the biceps brachii & the brachialis.
  19. What is the anterior division of the inferior trunk?
    • The medial root.
  20. The medial & lateral cords make up which nerve?
    • The median nerve (C6, C7, C8, T1).
    • Innervates the muscles of the anterior forearm, 5 intrinsic muscles on the lateral half of the palm, & the skin of the palm.
  21. Which nerve runs with the ulnar nerve?
    The medial brachial cutaneous nerve (C8, T1).
Card Set
PNS Exam 2
Lecture Exam 2