Explanation Explanation/justification for the correct answer: Option (c) phrenic. The cervical plexus is considered as a small plexus that originates the spinal nerves C1-C4 The cervical plexus is involved in the innervations of superficial neck structures. It also contains phrenic nerves, which plays an important role in breathing. The phrenic nerve descends along the sides of the neck to enter the thorax, and it further descends along the sides of the mediastinum to reach the diaphragm. So, the correct answer is option (b). Explanation for incorrect answer: Option (a) median...

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11th Edition

ISBN: 9781259807657

Author: Cinnamon VanPutte, Jennifer Regan, Andrew F. Russo Dr., Rod R. Seeley Dr.

Publisher: MCGRAW-HILL HIGHER EDUCATION

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Question

Chapter 12, Problem 12RAC

Summary Introduction

Introduction:

A plexus involves intermingling of nerves. A plexus is formed when the ventral rami of different spinal nerves (roots) join with each other. The nerves that originate from plexus usually contain axons from more than one spinal nerve.

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Chapter 12, Problem 11RAC

Chapter 12, Problem 13RAC

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Chapter 12 Solutions

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Ch. 12.1 - Prob. 1AYP Ch. 12.1 - Name the meninges surrounding the spinal cord....Ch. 12.1 - What is the thecal sac? What two structures hold...Ch. 12.1 - Describe the arrangement of gray arid white matter...Ch. 12.1 - Where are the cell bodies of somatic motor and...Ch. 12.1 - What kinds of neurons are in the dorsal roots, in...Ch. 12.2 - Prob. 7AYP Ch. 12.2 - Describe the operation of a gamma motor neuron.Ch. 12.2 - Prob. 9AYP Ch. 12.2 - Prob. 10AYP

Ch. 12.2 - Prob. 11AYP Ch. 12.3 - Prob. 12AYP Ch. 12.3 - What is a dermatome? Why are dermatomes clinically...Ch. 12.3 - Prob. 14AYP Ch. 12.3 - Describe the distribution of the ventral rami of...Ch. 12.3 - Prob. 16AYP Ch. 12.3 - Prob. 17AYP Ch. 12.3 - Prob. 18AYP Ch. 12.3 - Name the five major nerves that emerge from the...Ch. 12.3 - Name the four major nerves that arise from the...Ch. 12.3 - Prob. 21AYP Ch. 12.3 - Describe the structures innervated by the...Ch. 12.3 - Prob. 23AYP Ch. 12 - Prob. 1RAC Ch. 12 - The structure that anchors the inferior end of the...Ch. 12 - Prob. 3RAC Ch. 12 - Given these components of a reflex arc: (1)...Ch. 12 - Prob. 5RAC Ch. 12 - Several of the events that occur between the time...Ch. 12 - Prob. 7RAC Ch. 12 - Prob. 8RAC Ch. 12 - Damage to the dorsal ramus of a spinal nerve...Ch. 12 - Prob. 10RAC Ch. 12 - A dermatome Is the area of skin supplied by a pair...Ch. 12 - Prob. 12RAC Ch. 12 - The skin on the posterior surface of the hand is...Ch. 12 - The scatic nerve is actually two nerves combined...Ch. 12 - Prob. 15RAC Ch. 12 - Describe how stimulation of a neuron that has its...Ch. 12 - Prob. 2CT Ch. 12 - Prob. 3CT Ch. 12 - Prob. 4CT Ch. 12 - Prob. 5CT Ch. 12 - Prob. 6CT Ch. 12 - Prob. 7CT

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A plexus involves intermingling of nerves. A plexus is formed when the ventral rami of different spinal nerves (roots) join with each other. The nerves that originate from plexus usually contain axons from more than one spinal nerve.

Solution Summary: The author explains that a plexus is formed when the ventral rami of different spinal nerves (roots) join with each other.

Concept explainers

Introduction: A plexus involves intermingling of nerves. A plexus is formed when the ventral rami of different spinal nerves (roots) join with each other. The nerves that originate from plexus usually contain axons from more than one spinal nerve.

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Chapter 12 Solutions

Introduction:

A plexus involves intermingling of nerves. A plexus is formed when the ventral rami of different spinal nerves (roots) join with each other. The nerves that originate from plexus usually contain axons from more than one spinal nerve.