scholarly journals Are Spatial Memories for Familiar Environments Orientation Dependent?

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Adamantini Hatzipanayioti ◽  
Alexia Galati ◽  
Marianna Pagkratidou ◽  
Marios N. Avraamides
Keyword(s):  
Spatial Memories

The Influence of Existing Knowledge Structures on the Formation of Integrated Spatial Memories

2011 ◽  
Author(s):  
Nathan M. Greenauer ◽  
Catherine Mello ◽  
Marios N. Avraamides ◽  
Jonathan W. Kelly
Keyword(s):  
Knowledge Structures ◽  
Spatial Memories

scholarly journals Dissociation of exteroceptive and idiothetic orientation cues⋮ effect on hippocampal place cells and place navigation

1997 ◽  
Vol 352 (1360) ◽  
pp. 1515-1524 ◽  
Author(s):  
J. Bures ◽  
A. A. Fenton ◽  
Yu. Kaminsky ◽  
J. Rossier ◽  
B. Sacchetti ◽  
...  
Keyword(s):  
Spatial Cognition ◽  
Reference Frames ◽  
Target Location ◽  
Place Cells ◽  
Related Information ◽  
Place Navigation ◽  
Preference Task ◽  
Spatial Memories ◽  
Place Avoidance ◽  
Orientation Cues

Navigation by means of cognitive maps appears to require the hippocampus; hippocampal place cells (PCs) appear to store spatial memories because their discharge is confined to cell–specific places called firing fields (FFs). Experiments with rats manipulated idiothetic and landmark–related information to understand the relationship between PC activity and spatial cognition. Rotating a circular arena in the light caused a discrepancy between these cues. This discrepancy caused most FFs to disappear in both the arena and room reference frames. However, FFs persisted in the rotating arena frame when the discrepancy was reduced by darkness or by a card in the arena. The discrepancy was increased by ’field clamping’the rat in a room–defined FF location by rotations that countered its locomotion. Most FFs dissipated and reappeared an hour or more after the clamp. Place–avoidance experiments showed that navigation uses independent idiothetic and exteroceptive memories. Rats learned to avoid the unmarked footshock region within a circular arena. When acquired on the stable arena in the light, the location of the punishment was learned by using both room and idiothetic cues; extinction in the dark transferred to the following session in the light. If, however, extinction occurred during rotation, only the arena–frame avoidance was extinguished in darkness; the room–defined location was avoided when the lights were turned back on. Idiothetic memory of room–defined avoidance was not formed during rotation in light; regardless of rotation, there was no avoidance when the lights were turned off, but room–frame avoidance reappeared when the lights were turned back on. The place–preference task rewarded visits to an allocentric target location with a randomly dispersed pellet. The resulting behaviour alternated between random pellet searching and target–directed navigation, making it possible to examine PC correlates of these two classes of spatial behaviour. The independence of idiothetic and exteroceptive spatial memories and the disruption of PC firing during rotation suggest that PCs may not be necessary for spatial cognition; this idea can be tested by recordings during the place–avoidance and preference tasks.

scholarly journals Reactivation in Ventral Striatum during Hippocampal Ripples: Evidence for the Binding of Reward and Spatial Memories?

2008 ◽  
Vol 28 (40) ◽  
pp. 9895-9897 ◽  
Author(s):  
O. J. Ahmed ◽  
J. McFarland ◽  
A. Kumar
Keyword(s):  
Ventral Striatum ◽  
Spatial Memories

scholarly journals Spatial memories in insects

2009 ◽  
Vol 19 (24) ◽  
pp. R1103-R1108 ◽  
Author(s):  
Matthew Collett
Keyword(s):  
Spatial Memories

The interaction between working and reference spatial memories in rats on a radial maze

2015 ◽  
Vol 112 ◽  
pp. 100-107 ◽  
Author(s):  
Nicole A. Guitar ◽  
William A. Roberts
Keyword(s):  
Radial Maze ◽  
Spatial Memories

Two spatial memories are not better than one: Evidence of exclusivity in memory for object location☆

2006 ◽  
Vol 52 (3) ◽  
pp. 243-289 ◽  
Author(s):  
T BAGULEY ◽  
M LANSDALE ◽  
L LINES ◽  
J PARKIN
Keyword(s):  
Object Location ◽  
Spatial Memories ◽  
Better Than

DHA supplementation enhances high-frequency, stimulation-induced synaptic transmission in mouse hippocampus

2012 ◽  
Vol 37 (5) ◽  
pp. 880-887 ◽  
Author(s):  
Steve Connor ◽  
Gustavo Tenorio ◽  
Michael Tom Clandinin ◽  
Yves Sauvé
Keyword(s):  
Synaptic Transmission ◽  
High Frequency ◽  
Control Group ◽  
High Frequency Stimulation ◽  
Spatial Learning And Memory ◽  
Mouse Hippocampus ◽  
Spatial Memories ◽  
Frequency Stimulation ◽  
Activity Dependent ◽  
Synaptic Responses

While some studies on dietary supplementation with docosahexaenoic acid (DHA, 22:6n-3) have reported a beneficial effect on memory as a function of age, others have failed to find any effect. To clarify this issue, we sought to determine whether supplementing mice with a DHA-enriched diet could alter the ability of synapses to undergo activity-dependent changes in the hippocampus, a brain structure involved in forming new spatial memories. We found that DHA was increased by 29% ± 5% (mean ± SE) in the hippocampus for the supplemented (DHA+) versus nonsupplemented (control) group (n = 5 mice per group; p < 0.05). Such DHA elevation was associated with enhanced synaptic transmission (p < 0.05) as assessed by application of a high-frequency electrical stimulation protocol (100 Hz stimulation, which induced transient (<2 h) increases in synaptic strength) to slices from DHA+ (n = 4 mice) hippocampi when compared with controls (n = 4 mice). Increased synaptic responses were evident 60 min poststimulation. These results suggest that dietary DHA supplementation facilitates synaptic plasticity following brief high-frequency stimulation. This increase in synaptic transmission might provide a physiological correlation for the improved spatial learning and memory observed following DHA supplementation.

scholarly journals Insect Behavioral Evidence of Spatial Memories During Environmental Reconfiguration

2018 ◽  
pp. 415-427 ◽  
Author(s):  
Diogo Santos-Pata ◽  
Alex Escuredo ◽  
Zenon Mathews ◽  
Paul F. M. J. Verschure
Keyword(s):  
Spatial Memories ◽  
Behavioral Evidence

scholarly journals Neurophysiology of Spatial Cognition

Physiology ◽  
2000 ◽  
Vol 15 (5) ◽  
pp. 233-240 ◽  
Author(s):  
Jan Bures ◽  
André A. Fenton
Keyword(s):  
Spatial Cognition ◽  
Hippocampal Neurons ◽  
Spatial Information ◽  
Daily Experience ◽  
Robust Model ◽  
Spatial Memories ◽  
The Brain

Understanding of the neurophysiology of cognition is advancing through the study of how animals navigate and understand space. Manipulating various classes of spatial information and recording from hippocampal neurons provides a robust model for understanding how the brain stores and constructs the spatial memories that are critical for organizing daily experience.

scholarly journals Odour-Evoked Memory in Dogs: Do Odours Help to Retrieve Memories of Food Location?

Animals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1249
Author(s):  
Angelo Quaranta ◽  
Serenella d’Ingeo ◽  
Marcello Siniscalchi
Keyword(s):  
Learning Task ◽  
Spatial Task ◽  
Spatial Memories ◽  
Group 3 ◽  
Group 2 ◽  
Odor Group ◽  
With Memory ◽  
Specific Odor ◽  
Group 1

The ability of odors to spontaneously trigger specific memories has been widely demonstrated in humans. Although increasing evidence support the role of olfaction on dogs’ emotions and cognitive processes, very little research has been conducted on its relationship with memory in this species. The present study aimed at investigating the role of olfaction in the recall of detailed memories originally formed in the presence of a specific odor (i.e., vanilla). To test this, three groups of participants were trained with the same spatial learning task while a specific odor (i.e., vanilla) was dispersed in the testing room. Subjects were then divided in three experimental groups and after 24 h delay, they were presented with the same spatial task. The first group (Group 1) performed the task in the presence of a novel odor (i.e., control), whereas the second (Group 2) and the third group (Group 3) carried out the test in the presence of the vanilla odor and no odor (Group 3), respectively. After a brief delay, the test was presented again to the three groups of dogs: subjects of Group 1 were now tested in the presence of the vanilla odor, whereas the Group 2 was tested with the control odor. The Group 3 received no odor in both tests. A significant improvement of dogs’ performance was registered in the control-vanilla odors condition (Group 1), suggesting that the exposure to the odor presented at the encoding time would prompt the recall of spatial memories in dogs.

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