Orangutan (Pongo pygmaeus Abelii) spatial memory in a foraging task

1997 ◽  
Author(s):  
Suzanne E. MacDonald ◽  
Maria Agnes
Keyword(s):  
Spatial Memory ◽  
Pongo Pygmaeus ◽  
Foraging Task

scholarly journals Female cowbirds have more accurate spatial memory than males

2014 ◽  
Vol 10 (2) ◽  
pp. 20140026 ◽  
Author(s):  
Mélanie F. Guigueno ◽  
Danielle A. Snow ◽  
Scott A. MacDougall-Shackleton ◽  
David F. Sherry
Keyword(s):  
Sex Differences ◽  
Retention Interval ◽  
Spatial Memory ◽  
Spatial Cognition ◽  
Sex Difference ◽  
Molothrus Ater ◽  
Seasonal Differences ◽  
Brood Parasites ◽  
Foraging Task ◽  
Similar Search

Brown-headed cowbirds ( Molothrus ater ) are obligate brood parasites. Only females search for host nests and they find host nests one or more days before placing eggs in them. Past work has shown that females have a larger hippocampus than males, but sex differences in spatial cognition have not been extensively investigated. We tested cowbirds for sex and seasonal differences in spatial memory on a foraging task with an ecologically relevant retention interval. Birds were trained to find one rewarded location among 25 after 24 h. Females made significantly fewer errors than males and took more direct paths to the rewarded location than males. Females and males showed similar search times, indicating there was no sex difference in motivation. This sex difference in spatial cognition is the reverse of that observed in some polygynous mammals and is consistent with the hypothesis that spatial cognition is adaptively specialized in this brood-parasitic species.

scholarly journals Remembered reward locations restructure entorhinal spatial maps

Science ◽  
2019 ◽  
Vol 363 (6434) ◽  
pp. 1447-1452 ◽  
Author(s):  
William N. Butler ◽  
Kiah Hardcastle ◽  
Lisa M. Giocomo
Keyword(s):  
Spatial Memory ◽  
Entorhinal Cortex ◽  
Memory Task ◽  
Medial Entorhinal Cortex ◽  
Diverse Range ◽  
Spatial Memory Task ◽  
Foraging Task ◽  
Spatial Maps

Ethologically relevant navigational strategies often incorporate remembered reward locations. Although neurons in the medial entorhinal cortex provide a maplike representation of the external spatial world, whether this map integrates information regarding learned reward locations remains unknown. We compared entorhinal coding in rats during a free-foraging task and a spatial memory task. Entorhinal spatial maps restructured to incorporate a learned reward location, which in turn improved positional decoding near this location. This finding indicates that different navigational strategies drive the emergence of discrete entorhinal maps of space and points to a role for entorhinal codes in a diverse range of navigational behaviors.

The Effects of Complete Vestibular Deafferentation on Spatial Memory and the Hippocampus in the Rat: The Dunedin Experience

2015 ◽  
Vol 28 (5-6) ◽  
pp. 461-485 ◽  
Author(s):  
Paul F. Smith ◽  
Cynthia L. Darlington ◽  
Yiwen Zheng
Keyword(s):  
Spatial Memory ◽  
Memory Task ◽  
Reaction Time Task ◽  
Brain Structures ◽  
Memory Deficits ◽  
Radial Arm Maze ◽  
Hippocampal Dysfunction ◽  
Object Recognition Memory ◽  
Vestibular Information ◽  
Foraging Task

Our studies conducted over the last 14 years have demonstrated that a complete bilateral vestibular deafferentation (BVD) in rats results in spatial memory deficits in a variety of behavioural tasks, such as the radial arm maze, the foraging task and the spatial T maze, as well as deficits in other tasks such as the five-choice serial reaction time task (5-CSRT task) and object recognition memory task. These deficits persist long after the BVD, and are not simply attributable to ataxia, anxiety, hearing loss or hyperactivity. In tasks such as the foraging task, the spatial memory deficits are evident in darkness when vision is not required to perform the task. The deficits in the radial arm maze, the foraging task and the spatial T maze, in particular, suggest hippocampal dysfunction following BVD, and this is supported by the finding that both hippocampal place cells and theta rhythm are dysfunctional in BVD rats. Now that it is clear that the hippocampus is adversely affected by BVD, the next challenge is to determine what vestibular information is transmitted to it and how that information is used by the hippocampus and the other brain structures with which it interacts.

Wechsler Memory Scale, Rivermead Behavioral Memory Test, and Everyday Memory Questionnaire in Healthy Adults and Alzheimer Patients

2002 ◽  
Vol 18 (1) ◽  
pp. 63-77 ◽  
Author(s):  
Anastasia Efklides ◽  
Efterpi Yiultsi ◽  
Theopisti Kangellidou ◽  
Fotini Kounti ◽  
Fotini Dina ◽  
...  
Keyword(s):  
Spatial Memory ◽  
Semantic Memory ◽  
Memory Test ◽  
Healthy Adults ◽  
Gender Effects ◽  
Everyday Memory ◽  
Wechsler Memory Scale ◽  
Everyday Memory Questionnaire ◽  
Behavioral Memory ◽  
Memory Questionnaire

Summary: The Wechsler Memory Scale (WMS) is a laboratory-based memory test that has been criticized for its lack of ecological validity and for not testing long-term memory. A more recent memory test, which aims at testing everyday memory, is the Rivermead Behavioral Memory Test (RBMT); it tests prospective memory and other forms of memory not tapped by WMS. However, even this test does not capture all aspects of everyday memory problems often reported by adults. These problems are the object of the Everyday Memory Questionnaire (EMQ). This study aimed at identifying the relationships between these three memory tests. The differential effect of Alzheimer's disease (AD) on the above relationships was also studied. The sample consisted of 233 healthy adults (20 to 75+ years of age) and 39 AD patients (50 to 75 years of age). Confirmatory factor analysis revealed the following latent factors: Verbal Memory, Visual Reconstruction, Orientation, Message (action embedded in spatial context), Visual Recognition, Spatial Memory, New Learning/Association Forming, Prospective/Episodic Memory, and Metamemory. These first-order factors were further explained by two second-order factors: Semantic Memory and Coordination of Semantic and Visuo-Spatial Memory. This basic structure was preserved in the sample of AD patients, although AD patients performed less well on the WMS and the RBMT. Some interesting findings regarding semantic memory, face recognition, and metamemory in AD patients are also reported. Age, education, but no gender effects on memory performance were also detected.

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