Cited by 40Memory and Neural MechanismsNeuroscience and Neuropharmacology ResearchNeurotransmitter Receptor Influence on Behavior

Intracerebral distribution of DL-2-amino-phosphonopentanoic acid (AP5) and the dissociation of different types of learning

Butcher, S.P., Hamberger, A., Morris, R.G.M.·1991·Experimental Brain Research

Abstract

Chronic intraventricular infusion of the selective NMDA receptor antagonist AP5 appears to cause an impairment of spatial but not visual discrimination learning. However, Goddard (1986) has questioned whether this dissociation in task-selectivity reflects a difference in the underlying neural mechanisms or differential drug diffusion. Two experiments conducted to address this issue established (a) that chronic intraventricular infusion of AP5, at a dose sufficient to cause a spatial learning impairment, results in a relatively uniform distribution of the drug across the brain, and (b) that chronic bilateral intracortical infusion at sites very close to visual cortex also fails to impair visual discrimination learning. These findings argue against differential diffusion being a major cause of the sensitivity of spatial but not visual discrimination tasks to AP5, and raises the possibility that representational and procedural memory tasks may depend upon distinct cell-biological mechanisms of plasticity.

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Crossref · 10.1007/bf00229829

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Authors
Butcher, S. P., Hamberger, A., & Morris, R. G. M.
Affiliations
  • University of Edinburgh (GB)
  • University of Gothenburg (SE)
Venue
Experimental Brain Research
Published
1991-02
Volume
83
Issue
3
Pages
521-6
ISSN
  • 0014-4819 (ISSN-L)
  • 1432-1106
OpenAlex
W2002447155
Cited by
40
References
22
Citations by year
2024: 1 · 2020: 2 · 2013: 3 · 2012: 1
FWCI
2.08
Type
journal article
Language
en
Open access
closed
Locations
  • Experimental Brain Research (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
AP5, NMDA receptor antagonism, intraventricular infusion, spatial discrimination learning, visual discrimination learning, learning disabilities, procedural memory, synaptic plasticity
MeSH terms
Animals, Brain, Cerebral Cortex, Cerebral Ventricles, Corpus Striatum, Discrimination, Psychological, Hippocampus, Infusions, Parenteral, Learning, Male, Neurons, Organ Specificity, Rats, Inbred Strains, Reference Values, Space Perception, Visual Cortex, Visual Perception, 2-Amino-5-phosphonovalerate, Rats

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