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:4/11/2017)... 2017 No two people are believed ... New York University Tandon School of Engineering and ... that partial similarities between prints are common enough ... phones and other electronic devices can be more ... lies in the fact that fingerprint-based authentication systems ...
(Date:4/5/2017)...  The Allen Institute for Cell Science today announces ... portal and dynamic digital window into the human cell. ... application of deep learning to create predictive models of ... a growing suite of powerful tools. The Allen Cell ... publicly available resources created and shared by the Allen ...
(Date:4/4/2017)... --  EyeLock LLC , a leader of iris-based identity ... and Trademark Office (USPTO) has issued U.S. Patent No. ... iris image with a face image acquired in sequence ... th issued patent. "The issuance ... multi-modal biometric capabilities that have recently come to market ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... ... Andi Purple announced Dr. Suneel I. Sheikh, the co-founder, CEO and chief research ... Inc. has been selected for membership in ARCS Alumni Hall of Fame ...
(Date:10/11/2017)... ... 11, 2017 , ... Personal eye wash is a basic first aid supply for any work ... which eye do you rinse first if a dangerous substance enters both eyes? It’s one ... with its unique dual eye piece. , “Whether its dirt and debris, or an ...
(Date:10/11/2017)... ... October 11, 2017 , ... Proscia Inc ... hosting a Webinar titled, “Pathology is going digital. Is your lab ready?” with ... adoption best practices and how Proscia improves lab economics and realizes an increase ...
(Date:10/11/2017)... LAGUNA HILLS, Calif. , Oct. 11, 2017 /PRNewswire/ ... London (ICR) and University of ... tool to risk-stratify patients with multiple myeloma (MM), in a ... . The University of Leeds is ... Myeloma UK, and ICR will perform the testing services to ...
Breaking Biology Technology: