1. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Fundamentals of Anatomy & Physiology SIXTH EDITION Frederic H. Martini PowerPoint ® Lecture Slide Presentation prepared by Dr. Kathleen A. Ireland, Biology Instructor, Seabury Hall, Maui, Hawaii Chapter 13, part 2 The Spinal Cord and Spinal Nerves

2. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings SECTION 13-3 Spinal Nerves

3. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Nerves consist of: Epineurium Perineurium Endoneurium 31 pairs of spinal nerves

4. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 13.8 A Peripheral Nerve Figure 13.8

5. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings White ramus (myelinated axons) Gray ramus (unmyelinated axons that innervate glands and smooth muscle) Dorsal ramus (sensory and motor innervation to the skin and muscles of the back) Ventral ramus (supplying ventrolateral body surface, body wall and limbs) Each pair of nerves monitors one dermatome Spinal nerves

6. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 13.9a Figure 13.9 Peripheral Distribution of Spinal Nerves

7. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 13.9b Figure 13.9 Peripheral Distribution of Spinal Nerves

8. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 13.10 Dermatomes Figure 13.10

9. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Complex interwoven network of nerves Four large plexuses Cervical plexus Brachial plexus Lumbar plexus Sacral plexus Nerve plexus

10. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 13.11 Figure 13.11 Peripheral Nerves and Nerve Plexus

11. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 13.12 The Brachial Plexus Figure 13.12

12. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 13.13 The Branchial Plexus Figure 13.13a, b

13. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 13.13 The Branchial Plexus Figure 13.13c

14. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 13.14 The Lumbar and Sacral Plexuses Figure 13.14a, b

15. Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 13.14 The Lumbar and Sacral Plexuses Figure 13.14c, d