Navigation Links
Are animals stuck in time?
Date:4/3/2008

Dog owners, who have noticed that their four-legged friend seem equally delighted to see them after five minutes away as five hours, may wonder if animals can tell when time passes. Newly published research from The University of Western Ontario in London, Canada may bring us closer to answering that very question.

The results of the research, entitled Episodic-Like Memory in Rats: Is it Based on When or How Long Ago, appear in the current issue of the journal Science, which was released today.

William Roberts and his colleagues in Westerns Psychology Department found that rats are able to keep track of how much time has passed since they discovered a piece of cheese, be it a little or a lot, but they dont actually form memories of when the discovery occurred. That is, the rats cant place the memories in time.

The research team, led by Roberts, designed an experiment in which rats visited the arms of a maze at different times of day. Some arms contained moderately desirable food pellets, and one arm contained a highly desirable piece of cheese. Rats were later returned to the maze with the cheese removed on certain trials and with the cheese replaced with a pellet on others.

Three groups of rats were tested in the research using three varying cues: when, how long ago or when plus how long ago.

Only the cue of "how long ago food was encountered" was used successfully by the rats.

These results, the researchers say, suggest that episodic-like memory in rats is qualitatively different from human episodic memory, which involves retention of the point in past time when an event occurred.

The rats remember whether they did something, such as hoarded food a few hours or five days ago, explained Roberts. The more time that has passed, the weaker the memory may be. Rats may learn to follow different courses of action using weak and strong memory traces as cues, thus responding differently depending on how long ago an event occurred. However, they do not remember that the event occurred at a specific point in past time.

Previous studies have suggested that rats and scrub jays (a relative of the crow and the blue jay) appear to remember storing or discovering various foods, but it hasnt been clear whether the animals were remembering exactly when these events happened or how much time had elapsed.

This research, said Roberts, supports the theory I introduced that animals are stuck in time, with no sense of time extending into the past or future.


'/>"/>

Contact: Jeff Renaud
jrenaud9@uwo.ca
519-661-2111 x85165
University of Western Ontario
Source:Eurekalert

Related biology news :

1. Report: African, Asian, Latin American farm animals face extinction
2. UT researcher sheds new light on hybrid animals
3. Penn Veterinary Medicine report new strategy to create genetically-modified animals
4. UT researcher sheds new light on hybrid animals
5. Fungus genome yielding answers to protect grains, people and animals
6. From GM farm animals to embryonic stem cell research
7. Colorful view for first land animals
8. Gene guards grain-producing grasses so people and animals can eat
9. Texas A&M testing oral contraceptives for animals
10. Mantis shrimp vision reveals new way that animals can see
11. Common aquatic animals show extreme resistance to radiation
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/24/2017)... WASHINGTON , April 24, 2017 ... counsel and partner with  Identity Strategy Partners, LLP ... "With or without President Trump,s March 6, ... Foreign Terrorist Entry , refugee vetting can be instilled ... refugee resettlement. (Right now, all refugee applications are ...
(Date:4/18/2017)... Inc., a global expert in SoC-based imaging and computing solutions, has ... features the company,s hybrid codec technology. A demonstration utilizing TeraFaces ® ... be showcased during the upcoming Medtec Japan at Tokyo Big Sight ... Las Vegas Convention Center April 24-27. ... Click here for an image of the ...
(Date:4/13/2017)... UBM,s Advanced Design and Manufacturing event in ... and evolving technology through its 3D Printing and Smart ... the expo portion of the event and feature a ... on trending topics within 3D printing and smart manufacturing. ... will take place June 13-15, 2017 at the Jacob K. ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... ... October 10, 2017 , ... Dr. Bob Harman, founder and ... San Diego Rotary Club. The event entitled “Stem Cells and Their ... 300+ attendees. Dr. Harman, DVM, MPVM was joined by two human doctors: Peter ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... process optimization firm for the life sciences and healthcare industries, announces a presentation ... San Francisco. , The presentation, “Automating GxP Validation for Agile Cloud Platforms,” will ...
(Date:10/9/2017)... ... October 09, 2017 , ... The award-winning American Farmer ... first quarter 2018. American Farmer airs Tuesdays at 8:30aET on RFD-TV. , With ... with the challenge of how to continue to feed a growing nation. At the ...
(Date:10/9/2017)... ... October 09, 2017 , ... ... medical journal, Epilepsia, Brain Sentinel’s SPEAC® System which uses the surface electromyography ... generalized tonic-clonic seizures (GTCS) using surface electromyography (sEMG). The prospective multicenter phase ...
Breaking Biology Technology: