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Assessment of Memory Function in Pilocarpine-induced Epileptic Mice
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Published on: June 4, 2020

Posterior parietal cortex and long-term memory: some data from laboratory animals.

Jociane C Myskiw1, Iván Izquierdo

  • 1Instituto Nacional de Neurociência Translacional, Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Porto Alegre RS, Brazil.

Frontiers in Integrative Neuroscience
|March 1, 2012
PubMed
Summary

The posterior parietal cortex (PPC) plays a role in spatial perception and increasingly in memory. Research is exploring its function in human episodic memory, though findings are paradoxical.

Keywords:
episodic memorymemory consolidationmemory retrievalposterior parietal cortexworking memory

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurobiology

Background:

  • The posterior parietal cortex (PPC) was traditionally associated with spatial perception and motor control.
  • Recent research indicates the PPC's involvement in higher cognitive functions, including working memory and episodic memory consolidation and retrieval.
  • Molecular mechanisms in rodents suggest specific neurotransmitter roles, prompting investigation into their relevance in primates.

Purpose of the Study:

  • To investigate the role of the posterior parietal cortex (PPC) in episodic memory.
  • To reconcile conflicting evidence from imaging and lesion studies regarding PPC's function in memory.
  • To determine the extent to which rodent findings on PPC molecular processes are applicable to primates and humans.

Main Methods:

  • Review and synthesis of existing neuroimaging studies.
  • Analysis of lesion studies investigating the effects of PPC damage on memory.
  • Extrapolation of findings from rodent models to primate and human cognitive functions.

Main Results:

  • Neuroimaging studies strongly implicate the PPC in episodic memory processes.
  • Lesion studies provide less conclusive evidence for the PPC's direct role in episodic memory.
  • A discrepancy exists between imaging and lesion data concerning the PPC's contribution to memory.

Conclusions:

  • The precise role of the PPC in the consolidation and retrieval of episodic memory, beyond its known functions in spatial processing, remains unclear.
  • Further research is needed to resolve the paradox between imaging and lesion study findings in humans and primates.
  • The PPC's specific contribution to episodic memory, in conjunction with the hippocampus and amygdala, requires further elucidation.