Weekly News via Email
   Set as homepage | Add to favorites | Customer Service | Subscribe Now | Place an Ad | Contact Us | Sitemap Thursday, 08.21.2014
Classifieds
News Archive
Su Mo Tu We Th Fr Sa
 1  2
 3  4  5  6  7  8  9
 10  11  12  13  14  15  16
 17  18  19  20  21  22  23
 24  25  26  27  28  29  30
 31
Online Extras
Site Services
Around Bend
Outdoor Fun
Travel Info
Shop Local




Members Of



Poll: Today's Live Poll
Email to a friend | Print this | PDF version | Comments (0 posted) 
  Blogger |   del.icio.us |   digg |   newsvine

Dec 22,2006
Even rats may dream in pictures, study finds
by World-Science.net

Re­search­ers have re­ported what they say is some of the strong­est ev­i­dence to date that an­i­mals, like hu­mans, have dreams with im­ages.

Mat­thew A. Wil­son and Dao­yun Ji of the Mas­sa­chu­setts In­sti­tute of Tech­nol­o­gy in Cam­bridge, Mass., ex­am­ined what hap­pens in rats’ brains as they “dream” about mazes they ran while awake.

 
A "dreaming" rat. (Courtesy MIT)
In a pre­vious stu­dy five years ago, Wil­son found that rat brain cells re­played some of the same ac­tiv­i­ty pat­terns in sleep as they did while run­ning a maze. The sci­en­tists rea­soned that this might re­flect dream­ing about the maze.

But at that time, the re­search­ers could­n’t say wheth­er im­ages ac­com­pa­nied the re­plays. This is because the re­en­act­ments were found to occur in the brain’s mem­o­ry cen­ter, the hip­po­cam­pus, not in specif­i­cally vis­u­al ar­eas of the brain.

In a new ex­per­i­ment, Wil­son and Ji recorded brain ac­tiv­i­ty si­mul­ta­ne­ous­ly in the hip­po­cam­pus and the vis­u­al cor­tex, a key vi­sion cen­ter of the brain. They found what they de­scribed as strong ev­i­dence that the re­played me­m­o­ries did con­tain pic­tures.

“This work brings us clos­er to an un­der­stand­ing of the na­ture of an­i­mal dreams and gives us im­por­tant clues as to the role of sleep in pro­cess­ing mem­o­ries of our past ex­pe­ri­ences,” Wil­son said.

Ev­i­dence that an­i­mals dream, even viv­id­ly, is not a new phe­no­me­non. Cats with cer­tain types of brain da­mage chase im­ag­i­nary mice dur­ing the sleep stage as­so­ci­at­ed with dream­ing in hu­mans, called rap­id eye move­ment sleep.

Wilson re­cords the elec­tri­cal sig­nal­ing of in­di­vid­u­al brain cells to com­pare their ac­tiv­i­ty in sleep­ing and wak­ing. He also in­vest­i­gates how this act­i­vi­ty may help ce­ment me­m­o­ries in place, as dreams are theor­ized to do. The new work shows that the brain re­plays mem­o­ries in two places at on­ce—in the vis­u­al cor­tex and hip­po­cam­pus, he said.

These ac­tiv­i­ties “may con­trib­ute to or re­flect the re­sult of the mem­o­ry con­sol­i­da­tion pro­cess,” Wil­son and Ji wrote in the stu­dy. It ap­peared in the Dec. 17 ad­vance on­line edi­tion of the re­search jour­nal Na­ture Neu­ro­science.

1033 times read

Related news
Brain cells tied to consciousness reported found by Bend_Weekly_News_Sources posted on Feb 22,2008

Stem cells from anyone? by Bend_Weekly_News_Sources posted on Jun 08,2007

Fish logic surprises researchers by Stanford University and World posted on Jan 26,2007

New “longevity gene” spurs hopes of long life by Bend_Weekly_News_Sources posted on May 04,2007

Computers learn 'regret' by Bend_Weekly_News_Sources posted on Feb 29,2008

Did you enjoy this article? Rating: 5.00Rating: 5.00Rating: 5.00Rating: 5.00Rating: 5.00 (total 3 votes)

Market Information
Breaking News
Most Popular
Most Commented
Featured Columnist
Horoscope Guide
Aquarius Aquarius Libra Libra
Aries Aries Pisces Pisces
Cancer Cancer Sagittarius Sagittarius
Capricorn Capricorn Scorpio Scorpio
Gemini Gemini Taurus Taurus
Leo Leo Virgo Virgo
Local Attractions
Bend Visitors & Convention Bureau
Bend Visitors & Convention Bureau

Mt. Bachelor Resort
Mt. Bachelor Resort

Les Schwab Ampitheater
Les Schwab Ampitheater

Deschutes County Fairgrounds
Deschutes County
Fairgrounds

Tower Theatre
Tower Theatre

The High Desert Museum

Advertisements



Deschutes County

Google  
  Web    BendWeekly.com
© 2006 Bend Weekly News
A .Com Endeavors, Inc. Company.
All Rights Reserved. Terms under
which this service is provided to you.
Please read our Privacy Policy. Contact us.
Bend Weekly News & Event Guide Online
   Save the Net
Advertisement
External sites open in new window,
not endorsed by BendWeekly.com
Subscribe in NewsGator Online
Add to Google Add to MSN Add to My AOL
What are RSS headlines?