Explanation The anatomical features of the spinal cord are described as follows: Cervical enlargement: It involves in the innervation of the shoulder and upper limbs. Lumbosacral enlargement: It involves in the innervation of the pelvis and lower limbs. Conus medullaris: It is a conical, tapered region of the spinal cord that is present inferior to the lumbar enlargement. Filum terminale: It is a slender strand of fibrous tissue that ranges from the inferior tip of the conus medullaris to the second sacral vertebra. Cauda equina: Since the adult spinal cord ends at the level of the first or second lumbar vertebra, the posterior and anterior roots of the spinal segments extend inferiorly. When this portion is seen in gross dissection, the filum terminale and the anterior and posterior roots look like a horse’s tail. This region is called the cauda equina. Posterior medial sulcus: It is a shallow longitudinal groove that is present on the dorsal part of the spinal cord. Posterior root: It consists of the axon part of the sensory neurons and is present on the posterior or dorsal side of the spinal cord. Posterior root ganglion: It consists of cell bodies or soma part of the sensory neurons. Each 31 segment of the spinal cord consists of a pair of posterior root ganglion. Anterior median fissure: It is the deep groove of the spinal cord that extends along with its anterior surface...

Modified MasteringA&P with Pearson eText -- Standalone Access Card -- for Visual Anatomy & Physiology (2nd Edition)

2nd Edition

ISBN: 9780321974013

Author: Frederic H. Martini, William C. Ober, Judi L. Nath, Edwin F. Bartholomew, Kevin Petti

Publisher: PEARSON

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Question

Chapter 12.1, Problem 2LO

Summary Introduction

To describe: The anatomical features of the spinal cord.

Introduction: The spinal and the brain make up the major part of the central nervous system. The spinal is a tube-like structure that begins from the medulla oblongata of the brain stem and extends toward the lumbar region of the vertebral column. It consists of 31 segments 31 pairs of spinal nerves.

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Chapter 12.1, Problem 1LO

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Chapter 12 Solutions

Modified MasteringA&P with Pearson eText -- Standalone Access Card -- for Visual Anatomy & Physiology (2nd Edition)

Ch. 12.1 - Prob. 1.1R Ch. 12.1 - Prob. 1.2R Ch. 12.1 - Prob. 1.3R Ch. 12.1 - Prob. 2.1R Ch. 12.1 - Prob. 2.2R Ch. 12.1 - Prob. 2.3R Ch. 12.1 - Prob. 3.1R Ch. 12.1 - Prob. 3.2R Ch. 12.1 - Prob. 3.3R Ch. 12.1 - Prob. 4.1R

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Solution Summary: The author describes the anatomical features of the spinal cord.

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