Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892



Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

Discuss Concepts An accident victim arrives at the emergency department with severe damage to the reticular formation. Based on information in this chapter, describe some of the symptoms that the examining physician might discover.

Summary Introduction

To review:

The symptoms shown by an accident victim who has suffered from severe reticular formation damage.


Reticular formation is a broad net-like formation shown by the gray matter and the white matter. The white matter consists of myelinated axons and the gray matter contains neuronal cell bodies. The reticular formation begins at the upper portion of the spinal cord and ends into the lower portion of the diencephalon.


The neurons that participate in reticular formation contain both the sensory as well as the motor functions. The sensory function is conducted by the ascending neurons and the motor function is conducted by the descending neurons. RAS (reticular activating system) is the part of reticular system that contains sensory axons which project towards the cerebral cortex. RAS helps in maintaining consciousness.

It is responsible for awakening in response to a startling sound like the sound of an alarm clock...

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