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Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Nerves consist of: Epineurium Perineurium Endoneurium 31 pairs of spinal nerves
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Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Fundamentals of Anatomy & Physiology
SIXTH EDITION
Frederic H. M
artini
PowerPoint® Lecture Slide Presentation prepared by Dr. Kathleen A. Ireland, Biology Instructor, Seabury Hall, Maui, Hawaii
Chapter 13, part 2The Spinal Cord and Spinal Nerves
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
SECTION 13-3 Spinal Nerves
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• Nerves consist of:• Epineurium• Perineurium• Endoneurium
31 pairs of spinal nerves
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 13.8 A Peripheral Nerve
Figure 13.8
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• 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
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 13.9a
Figure 13.9 Peripheral Distribution of Spinal Nerves
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 13.9b
Figure 13.9 Peripheral Distribution of Spinal Nerves
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 13.10 Dermatomes
Figure 13.10
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• Complex interwoven network of nerves• Four large plexuses
• Cervical plexus• Brachial plexus• Lumbar plexus• Sacral plexus
Nerve plexus
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Figure 13.11
Figure 13.11 Peripheral Nerves and Nerve Plexus
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Figure 13.12 The Brachial Plexus
Figure 13.12
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Figure 13.13 The Branchial Plexus
Figure 13.13a, b
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Figure 13.13 The Branchial Plexus
Figure 13.13c
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 13.14 The Lumbar and Sacral Plexuses
Figure 13.14a, b
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 13.14 The Lumbar and Sacral Plexuses
Figure 13.14c, d
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