Explanation Every spinal nerve joins to the spinal cord by the dorsal as well as ventral roots. Every root is made from the row of the rootlets, which join along the length of the spinal cord section. Ventral roots are comprised of the motor or efferent fibers, which occur from the ventral horn motor neurons and run to and also innervate the skeletal muscles. Dorsal roots are comprised of sensory or afferent fibers, which occur from the sensory neurons present in the dorsal root ganglia as well as conduct. A spinal nerve is slightly short and immediately after originating from its foramen, it gets segregated into a small dorsal ramus and a large ventral ramus. Also, a small meningeal branch occurs, which reenters the vertebral canal for innervating the blood vessels and meninges within...

5th Edition

ISBN: 9780321861580

Author: Marieb, Elaine N.

Publisher: Pearson College Div

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Question

Chapter 13, Problem 26CYU

Summary Introduction

To review:

The differences between the dorsal roots and dorsal rami of spinal nerves on the basis of their location and composition.

Introduction:

There are total 31 pairs of spinal nerves that are comprised of thousands of nerve fibers occurring from the spinal cord and providing to all regions of the body apart from the head and certain regions of the neck. These are all referred to as mixed nerves.

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Chapter 13, Problem 25CYU

Chapter 13, Problem 27CYU

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Solution Summary: The author explains the differences between the dorsal roots and rami of spinal nerves on the basis of their location and composition.

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