Chapter 13: The Spinal Cord and Spinal Nerves Principles of Anatomy and Physiology, 12th Edition, by Bryan Derrickson, Gerald Tortora.

Principles of Anatomy and Physiology, 12th Edition, by Bryan Derrickson, Gerald Tortora. Multiple Choice & Essays 1. Which of the three spinal meninges is the most superficial? a. Arachnoid mater b. Dura mater c. Menix mater d. Pia mater e. Epi mater Ans: B Difficulty: medium Feedback: 13.1 2. Which of the below contains cerebrospinal fluid? a. Epidural space b. Subarachnoid space c. Dural space d. Meninx e. Pia mater Ans: B Difficulty: medium Feedback: 13.1 3. Denticulate ligaments are thickenings of : a. Arachnoid mater b. Pia mater c. Dura mater d. Interstitial fluid e. Subdural space Ans: B Difficulty: medium Feedback: 13.1 4. Which type of axons contain endoneurium? a. A. Myelinated b. B. Unmyelinated c. C. Dendrites only have endoneurium d. Both a and b e. None of the above Ans: D Difficulty: medium Feedback: 13.2 5. Briefly explain why the spinal cord is shorter than the vertebral column in an adult? Ans: During early childhood, both the spinal cord and the vertebral column grow longer as part of overall body growth. Elongation of the spinal cord stops around age four or five but growth of the vertebral column continues. This is why the spinal cord does not extend the entire length of the vertebral column. Difficulty: medium Feedback: 13.1 6. This is a structure that results from nervous input from the upper extremities. a. Lumbar enlargement b. Filum terminale c. Cauda equine d. Spinal nerve 12 e. Cervical enlargement Ans: A Difficulty: medium Feedback: 13.1 7. This contains only sensory axons that conduct nerve impulses from sensory receptors in the skin, muscles and internal organs into the CNS. a. Spinal nerves b. Cauda equine c. Anterior root d. Posterior root e. Central canal Ans: D Difficulty: medium Feedback: 13.1 8. Which layer is found surrounding the entire spinal nerve? a. Dura mater b. Pia mater c. endoneurium d. perineurium e. epineurium Ans: E Difficulty: medium Feedback: 13.2 9. A man presents with median nerve palsy in his left hand. What is the most likely sight of injury? a. Brachial plexus b. Intercostal nerves c. Lumbar plexus d. Medial nerve e. Radial nerve Ans: A Difficulty: hard Feedback: 13.2