Evidence map›Paper›PMID 24591610›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2014

Memory loss in a nonnavigational spatial task after hippocampal inactivation in monkeys.

Patrick A Forcelli, Guillermo Palchik, Taylor Leath, Jacqueline T DesJardin, Karen Gale, Ludise Malkova

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
1.7field-weighted citation impact, top 17% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

27 citing papers in PubMed, 37 citations in OpenAlex.

  1. Article
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  4. Sustained Hippocampal Theta Oscillations Reflect Experience-Dependent Learning in Backward Temporal Order Memory Retrieval.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
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  10. Pharmacological Inactivation of the Bed Nucleus of the Stria Terminalis Increases Affiliative Social Behavior in Rhesus Macaques.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2023
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 2 countries.

Patrick A ForcelliDepartment of Pharmacology and Physiology and Interdisciplinary Program in Neuroscience, Georgetown University Medical Center, Washington, DC 20007.
Guillermo Palchik
Taylor Leath
Jacqueline T DesJardin
Karen Gale
Ludise Malkova
Georgetown University Medical Center · USCzech Academy of Sciences, Institute of Physiology · CZGeorgetown University · US

Funding

Predoctoral Training in Intergrative NeuroscienceT32NS041231 · NINDS · GEORGETOWN UNIVERSITY · PI Ludise Malkova, Ashley S VanMeter · 2001 to 2026
$6.8M
Postdoctoral Training in Developmental Disabilities ResearchT32HD046388 · NICHD · CHILDREN'S RESEARCH INSTITUTE · PI VITTORIO GALLO, VITTORIO GALLO VITTORIO GALLO · 2006 to 2016
$1.5M
NICHD NIH HHS HD046388NICHD NIH HHS T32 HD046388NINDS NIH HHS T32 NS041231
6 · The paper itself

Abstract

The hippocampus has a well-documented role for spatial navigation across species, but its role for spatial memory in nonnavigational tasks is uncertain. In particular, when monkeys are tested in tasks that do not require navigation, spatial memory seems unaffected by lesions of the hippocampus. However, the interpretation of these results is compromised by long-term compensatory adaptation occurring in the days and weeks after lesions. To test the hypothesis that hippocampus is necessary for nonnavigational spatial memory, we selected a technique that avoids long-term compensatory adaptation. We transiently disrupted hippocampal function acutely at the time of testing by microinfusion of the glutamate receptor antagonist kynurenate. Animals were tested on a self-ordered spatial memory task, the Hamilton Search Task. In the task, animals are presented with an array of eight boxes, each containing a food reinforcer; one box may be opened per trial, with trials separated by a delay. Only the spatial location of the boxes serves as a cue to solve the task. The optimal strategy is to open each box once without returning to previously visited locations. Transient inactivation of hippocampus reduced performance to chance levels in a delay-dependent manner. In contrast, no deficits were seen when boxes were marked with nonspatial cues (color). These results clearly document a role for hippocampus in nonnavigational spatial memory in macaques and demonstrate the efficacy of pharmacological inactivation of this structure in this species. Our data bring the role of the hippocampus in monkeys into alignment with the broader framework of hippocampal function.

Indexed as

Adaptation, PhysiologicalAnalysis of VarianceAnimalsAppetitive BehaviorHippocampusKynurenic AcidMacacaMagnetic Resonance ImagingMemory DisordersNeuropsychological TestsPsychomotor PerformanceKynurenic Acidcognitionmuscimolnonhuman primateself-ordered sequencingtemporal lobe

Identifiers

PMID24591610
PMCPMC3964097
OpenAlexW1982821993

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.