Chapter 12.1, Problem 2I

(B)

Summary Introduction

To describe: The area of the spinal cord in which the virus-infected motor neurons is present.

Introduction: The poliomyelitis or polio is the viral disease that is caused by the polio virus. This disease affects the nervous system that can result in the paralysis of muscles. The symptoms of this disease include fever, sore throat, vomiting, head ache, abnormal reflexes and so on. It can transmit from one person to another person.

(C)

Summary Introduction

To describe: The portion of the spinal cord in which the certain disease affects the myelin shealth.

Introduction: The spinal cord is a tube-like structure that begins from the medulla oblongata of the brainstem and extends toward the lumbar region of the vertebral column. The spinal cord consists of both the sensory neurons and motor neurons. The neurons consist of the cell body, the dendrites and the axon. The axon of certain neurons is surrounded by the fatty white covering called as myelin sheath.