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...

6th Edition

ISBN: 9780134156415

Author: Elaine N. Marieb, Katja N. Hoehn

Publisher: PEARSON

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Question

Chapter 13.8, Problem 24CYU

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 13.7, Problem 23CYU

Chapter 13.8, Problem 25CYU

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Chapter 13 Solutions

Anatomy & Physiology (6th Edition)

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Ch. 13.4 - For each of the following, indicate whether it...Ch. 13.4 - Which part of the visual field would be affected...Ch. 13.4 - Prob. 13CYU Ch. 13.4 - Name the five taste modalities. Name the three...Ch. 13.5 - Apart from the bony boundaries, which structure...Ch. 13.5 - Which structure inside the spiral organ allows us...Ch. 13.5 - Prob. 17CYU Ch. 13.5 - If the brain stem did not receive input from both...Ch. 13.5 - Prob. 19CYU Ch. 13.6 - Prob. 20CYU Ch. 13.6 - What is in a nerve besides axons?Ch. 13.6 - Wills femoral nerve was crushed while clinicians...Ch. 13.7 - Name the cranial nerve(s) most involved in each of...Ch. 13.8 - Prob. 24CYU Ch. 13.8 - After his horse-riding accident, the actor...Ch. 13.9 - What are varicosities and where would you find...Ch. 13.10 - Which parts of the nervous system ultimately plan...Ch. 13.11 - Prob. 28CYU Ch. 13.11 - Prob. 29CYU Ch. 13.11 - Prob. 30CYU Ch. 13.11 - Prob. 31CYU Ch. 13 - The large onion-shaped receptors that are found...Ch. 13 - Proprioceptors include all of the following except...Ch. 13 - Prob. 3MC Ch. 13 - Prob. 5MC Ch. 13 - For each of the following muscles or body regions,...Ch. 13 - Prob. 33MC Ch. 13 - Prob. 4MC Ch. 13 - Match the names of the cranial nerves in column B...Ch. 13 - Prob. 8MC Ch. 13 - The portion of the fibrous layer that is white and...Ch. 13 - Which sequence best describes a normal route for...Ch. 13 - Prob. 11MC Ch. 13 - Damage to the medial recti muscles would probably...Ch. 13 - The phenomenon of dark adaptation is best...Ch. 13 - Blockage of the scleral venous sinus might result...Ch. 13 - Nearsightedness is more properly called a. myopia,...Ch. 13 - Of the neurons in the retina, the axons of which...Ch. 13 - Which reactions occur when a person looks at a...Ch. 13 - The blind spot of the eye is a. where more rods...Ch. 13 - Olfactory tract damage would probably affect your...Ch. 13 - Sensory impulses transmitted over the facial,...Ch. 13 - Taste buds are found on the a. anterior part of...Ch. 13 - Gustatory epithelial cells are stimulated by a....Ch. 13 - Olfactory nerve filaments are found a. in the...Ch. 13 - Conduction of sound from the middle ear to the...Ch. 13 - Which of the following statements does not...Ch. 13 - Pitch is to frequency of sound as loudness is to...Ch. 13 - The structure that allows pressure in the middle...Ch. 13 - Which of the following is important in maintaining...Ch. 13 - Equilibrium receptors that report the position of...Ch. 13 - Which of the following is not a possible cause of...Ch. 13 - Which of the following are intrinsic eye muscles?...Ch. 13 - Prob. 32MC Ch. 13 - List the structural components of the peripheral...Ch. 13 - Prob. 47SAQ Ch. 13 - Central pattern generators (CPGs) are found at the...Ch. 13 - Prob. 48SAQ Ch. 13 - Explain how a crossed-extensor reflex exemplifies...Ch. 13 - What clinical information can be gained by...Ch. 13 - Prob. 46SAQ Ch. 13 - How do rods and cones differ functionally?Ch. 13 - Where is the fovea centralis, and why is it...Ch. 13 - Prob. 37SAQ Ch. 13 - Since there are only three types of cones, how can...Ch. 13 - Where are the olfactory sensory neurons, and why...Ch. 13 - (a) Define plexus. (b) Indicate the spinal roots...Ch. 13 - What is the homeostatic value of flexor reflexes?Ch. 13 - Prob. 43SAQ Ch. 13 - Prob. 1CCS Ch. 13 - Prob. 2CCS Ch. 13 - Prob. 3CCS Ch. 13 - Prob. 1CCSS Ch. 13 - Prob. 2CCSS Ch. 13 - Prob. 3CCSS Ch. 13 - Prob. 4CCSS Ch. 13 - Prob. 5CCSS

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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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