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Why Do We Dream? To Ease PainfulMemories, Study HintsREM sleep acts like "overnight therapy," expert suggests.Christine De...
MRI scans performed during REM sleep revealed that brain activity fell in the amygdala—the emotion-processing part of the ...
Why do we dream? To ease painful memories, study hintsNombre:_____________________________________________________________...
4. Cuando la gente experimenta un evento emocional, químicos de   tensión se liberan para priorizar el evento, esencialmen...
2. ¿Qué es lo que sugiere Walker con su nueva investigación? _________   _________________________________________________...
7. ¿Por qué el sueño no es la cura para todo el estrés emocional? ______   _______________________________________________...
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Why do we dream ?

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Why do we dream ?

  1. 1. Why Do We Dream? To Ease PainfulMemories, Study HintsREM sleep acts like "overnight therapy," expert suggests.Christine DellAmoreNational Geographic NewsPublished November 29, 2011Dreaming may act like a type of overnight therapy, taking the edge off painfulmemories, a new study says.In a recent experiment, brain scans of people who viewed emotionally provocative picturesand then went to sleep showed that the part of the brain that handles emotions powereddown during rapid eye movement, or REM, sleep—the stage in which dreams occur.Whats more, the subjects reported that the images had less of an emotional charge themorning after. This suggests that REM sleep may help us work through difficult events inour lives, the researchers say.Why we sleep is still unknown, and even more elusive is the relationship between sleepand our emotional well-being, said study leader Matthew Walker, a neuroscientist at theUniversity of California, Berkeley.(Read about the mysteries of why we sleep in National Geographic magazine.)Theres already anecdotal evidence for sleeps therapeutic benefits—such as the oft-repeated adage that a person will go to bed and feel better in the morning, Walker said.And clinical data show that psychiatric mood disorders, from anxiety to post-traumaticstress disorder, can lead to sleep abnormalities."Despite that suggested interplay, weve understood remarkably little about the basicbrain science that may underlie a relationship between our emotional lives and oursleeping lives," he said.As his new research now suggests, "its not time that heals all wounds—its REM sleep."Sleeping on It HelpsFor the experiment, Walker and colleagues divided 34 healthy young volunteers into twogroups. People in each group viewed and rated their reactions to 150 images shown at 12-hour intervals while an MRI scanner measured brain activity.The pictures, which have been used in hundreds of studies, ranged from bland objects—i.e., a kettle on a counter top—to gory pictures of people maimed in accidents, Walkersaid.One group viewed the pictures in the morning and again in the evening without sleeping inbetween. The other group saw the same images before a full night of sleep and again thenext morning.The volunteers who slept between viewings reported a much milder emotional reaction tothe images after the second viewing.(See "Dreams Make You Smarter, More Creative, Studies Suggest.")
  2. 2. MRI scans performed during REM sleep revealed that brain activity fell in the amygdala—the emotion-processing part of the brain—possibly allowing the more rational prefrontalcortex to soften the images impact. (See an interactive brain map.)In addition, recordings of the subjects electrical brain activity during sleep made withelectroencephalograms showed a decrease in the levels of brain chemicals linked tostress.When people experience an emotional event, stress chemicals are released to flag andprioritize that event, essentially reminding the brain to work through it during sleep,according to Walker, whose study appeared November 23 in the journal Current Biology."Somewhere between the initial event and the later point of recollecting, the brain hasperformed an elegant trick of divorcing emotions from memory, so its no longer itselfemotional," Walker said."Thats what we mean by overnight therapy."(Take National Geographic magazines sleep quiz.)Dreaming Not an Emotional Cure-All?But sleep expert David Kuhlmann said the team may have "overstepped its bounds slightlyon the conclusions."For instance, dreaming is not a cure-all for emotional stress, said Kuhlmann, medicaldirector for sleep medicine at Bothwell Regional Health Center in Sedalia, Missouri.Though dreaming "helps improve the ability to handle stressful situations," its unlikely thatREM sleep will make bad memories totally dissipate, he said.However, he said "it certainly is an interesting finding in this limited subject size in anartificial environment."Both experts agreed that sleep is often ignored in the medical profession, even asresearch has been revealing its multiple health benefits.(Related: "Naps Clear Brains Inbox, Improve Learning.")And study leader Walker noted that the latest work is "yet another reminder that sleep isnot a state where our brain is dormant and not doing anything."Instead research is showing that sleep has many important functions, "and one of thosebenefits is to help us maintain our emotional and mental health."
  3. 3. Why do we dream? To ease painful memories, study hintsNombre:___________________________________________________________________Contesta el siguiente cuestionario en base a la información en el texto(español). I. Proporciona la siguiente información.Título______________________________________________________________________Autores____________________________________________________________________Fuente_____________________________________________________________________ II. ¿A qué se refieren los siguientes términos?REM__________________________________________________________________________________________________________________________________________________Amygdala______________________________________________________________________________________________________________________________________________ III. Subraya las oraciones que sean verdaderas. 1. La parte del cerebro que maneja las emociones se enciende en el sueño MOR. 2. Reportaron que las imágenes tienen menos carga emocional después de la mañana. 3. El sueño MOR nos ayuda a salir de eventos difíciles.
  4. 4. 4. Cuando la gente experimenta un evento emocional, químicos de tensión se liberan para priorizar el evento, esencialmente le recuerdan al cerebro que trabaje en ello durante el sueño.IV. Completa el cuadro de referencia con las palabras resaltadas en el texto. Referente Se refiere a… 1. This 2. That suggested interplay 3. He 4. Whose 5. Both experts 6. ItsV. Contesta las siguientes preguntas.1. ¿Cuáles son los efectos terapéuticos del sueño. __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ CREATED BY BLANCA ANDREA SALVADOR AVELAR- 2012
  5. 5. 2. ¿Qué es lo que sugiere Walker con su nueva investigación? _________ __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ ________________________________________________3. ¿De qué constó el estudio de Walker? _________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ ________________________________________________4. ¿Qué resultados obtuvo? ____________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ ____________________________________5. ¿Qué mostraron las grabaciones de la actividad eléctrica cerebral de los sujetos? __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________6. ¿A qué se refiere Walker con Terapia Nocturna? _____-____________ __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ ________________________________________________ CREATED BY BLANCA ANDREA SALVADOR AVELAR- 2012
  6. 6. 7. ¿Por qué el sueño no es la cura para todo el estrés emocional? ______ __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ _______________________________________________ CREATED BY BLANCA ANDREA SALVADOR AVELAR- 2012

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