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PowerPoint® Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
PART D7
The Nervous System
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Spinal Cord
Extends from the foramen magnum of the skull to the first or second lumbar vertebra
31 pairs of spinal nerves arise from the spinal cord
Cauda equina is a collection of spinal nerves at the inferior end
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Spinal Cord Anatomy
Figure 7.20 (1 of 2)
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Spinal Cord Anatomy
Figure 7.20 (2 of 2)
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
PNS: Spinal Nerves
Figure 7.25a
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Spinal Cord Anatomy
Internal gray matter is mostly cell bodies
Dorsal (posterior) horns
Anterior (ventral) horns
Gray matter surrounds the central canal
Central canal is filled with cerebrospinal fluid
Exterior white mater—conduction tracts
Dorsal, lateral, ventral columns
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Spinal Cord Anatomy
Figure 7.21
