...THE USES OF REASON by Jonah Lehrer The summer of 1949 had been long and dry in Montana; the grassy highlands were like tinder. On the afternoon of August 5—the hottest day ever recorded in the area—a stray bolt of lightning set the ground on fire. A parachute brigade of firefighters, known as smokejumpers, was dispatched to put out the blaze. Wag Dodge, a veteran with nine years of smokejumping experience, was in charge. When the jumpers took off from Missoula in a C-47, a military transport plane left over from World War II, they were told that the fire was small, just a few burning acres in the Mann Gulch river valley. As the plane approached the fire, the jumpers could see the smoke in the distance. The hot wind blew it straight across the sky. Mann Gulch is a place of geological contradiction. It is where the Rocky Mountains meet the Great Plains, pine trees give way to prairie grass, and the steep cliffs drop onto the steppes of the Midwest. The gulch is just over three miles long, but it marks the border between these two different terrains. The fire began on the Rockies’ side, on the western edge of the gulch. By the time the firefighters arrived at the gulch, the blaze had grown out of control. The surrounding hills had all been burned; the landscape was littered with the skeletons of pine trees. Dodge moved his men over to the grassy side of the gulch and told them to head downhill, toward the placid Missouri River. Dodge didn’t trust this blaze. He wanted to be near...
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...THE NERVOUS SYSTEM The nervous system allows the animal to quickly detect, communicate and co-ordinate information about its external and internal environment so it can make efficient appropriate responses for survival and/or reproduction. The two major parts of our nervous system are the central nervous system (CNS) and peripheral nervous system (PNS). The CNS is made of the brain and spinal cord. The cranial nerves, spinal nerves and ganglia make up the PNS. The cranial nerves connect to the brain. The cranial and spinal nerves contain the axons (fibres) of sensory and motor nerve cells. Nerve cells areas are also known as neurons. Neurons are the basic unit of the nervous system. They carry information or impulses as electrical signals from one place to another in the body. There are 3 types of neurons: Sensory Neurons- Sensory neurons carry electrical signals (impulses) from receptors or sense organs to the CNS. Sensory neurons are also called afferent neurons. The cell body of sensory neurons is outside the CNS in ganglia. Motor Neurons- Motor Neurons Carry Impulses From The CNS To Effector Organs Motor Neurons Are Also Called Efferent Neurons. The Cell Bodies Of Motor Neurons Are Inside The CNS. Interneurons- These are also called intermediate, relay, or associative neurons. They carry information between sensory and motor neurons. They are found in the CNS. TOP The Structure of Neurons A Neuron consists of THREE MAIN PARTS: A. CELL...
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... virtues of having a rich inner life. It dispels the myth that you have to be extroverted to be happy and successful.” —JUDITH ORLOFF, M.D., author of Emotional Freedom “In this engaging and beautifully written book, Susan Cain makes a powerful case for the wisdom of introspection. She also warns us ably about the downside to our culture’s noisiness, including all that it risks drowning out. Above the din, Susan’s own voice remains a compelling presence—thoughtful, generous, calm, and eloquent. Quiet deserves a very large readership.” —CHRISTOPHER LANE, author of Shyness: How Normal Behavior Became a Sickness 4/929 “Susan Cain’s quest to understand introversion, a beautifully wrought journey from the lab bench to the motivational speaker’s hall, offers convincing evidence for valuing substance over style, steak over sizzle, and qualities that are, in America, often derided. This book is brilliant, profound, full of feeling and brimming with insights.” —SHERI FINK, M.D., author of War Hospital “Brilliant, illuminating, empowering! Quiet gives not only a voice, but a path to homecoming for so many who’ve walked through the better part of their lives thinking the way they engage with the world is something in need of fixing.” 5/929 —JONATHAN FIELDS, author of Uncertainty:...
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...THE POWER OF HABIT Duhi_9781400069286_2p_all_r1.j.indd i 10/17/11 12:01 PM Duhi_9781400069286_2p_all_r1.j.indd ii 10/17/11 12:01 PM HABIT W h y We D o W h a t We D o and How to Change It THE POWER OF CHARLES DUHIGG Random House e N e w Yo r k Duhi_9781400069286_2p_all_r1.j.indd iii 10/17/11 12:01 PM This is a work of nonfiction. Nonetheless, some names and personal characteristics of individuals or events have been changed in order to disguise identities. Any resulting resemblance to persons living or dead is entirely coincidental and unintentional. Copyright © 2012 by Charles Duhigg All rights reserved. Published in the United States by Random House, an imprint of The Random House Publishing Group, a division of Random House, Inc., New York. RANDOM HOUSE and colophon are registered trademarks of Random House, Inc. ISBN 978-1-4000-6928-6 eBook ISBN 978-0-679-60385-6 Printed in the United States of America on acid-free paper Illustrations by Anton Ioukhnovets www.atrandom.com 2 4 6 8 9 7 5 3 1 First Edition Book design by Liz Cosgrove Duhi_9781400069286_2p_all_r1.j.indd iv 10/17/11 12:01 PM To Oliver, John Harry, John and Doris, and, everlastingly, to Liz Duhi_9781400069286_2p_all_r1.j.indd v 10/17/11 12:01 PM Duhi_9781400069286_2p_all_r1.j.indd vi 10/17/11 12:01 PM CONTENTS PROLOGUE The Habit Cure GGG xi PA R T O N E The Habits of Individuals 1. THE HABIT LOOP How Habits Work 3 31 60 2. THE...
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