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The hippocampus, a critical brain structure, plays an essential role in memory processing, particularly in the formation and retrieval of memory. This small, seahorse-shaped region is located within the medial temporal lobe, with one hippocampus in each brain hemisphere. Experimental studies involving lesions in the hippocampi of rats have demonstrated significant impairments in tasks such as object recognition and maze navigation, indicating the hippocampus involvement in both recognition and...
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Related Experiment Video

Updated: Jan 9, 2026

Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording
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Developmental differences in hippocampal long-axis contributions to memory precision.

Sagana Vijayarajah1, Margaret L Schlichting1

  • 1Department of Psychology, University of Toronto, M5S 3G3, Canada.

Developmental Cognitive Neuroscience
|December 9, 2025
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Summary
This summary is machine-generated.

Children and adults use different brain regions for memory, impacting precision. Developmental changes in the hippocampus refine memory capabilities, influencing accuracy and false memories.

Keywords:
AdultsChildrenEncodingFalse recognitionsMemory discrimination

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Cognitive Science

Background:

  • Memory precision differs across the mature brain's hippocampal long axis.
  • Developmental trajectory of hippocampal long-axis functionality in memory precision is not well understood.

Purpose of the Study:

  • To investigate how children and adults utilize the hippocampal long axis for precise memory formation.
  • To characterize age-related differences in hippocampal subregion engagement during memory encoding.
  • To explore the relationship between hippocampal engagement, memory precision, and false memory formation.

Main Methods:

  • Children (7-9 years) and adults performed encoding tasks focusing on details versus general scenes.
  • Recognition memory tests were conducted using studied scenes and lures.
  • Functional engagement of hippocampal subregions during encoding was measured.

Main Results:

  • Adults exhibited greater memory precision than children, discriminating studied scenes from lures more effectively.
  • Both age groups benefited from orienting to specific details during encoding.
  • Children recruited the posterior hippocampus, while adults engaged the anterior hippocampus during specific encoding.
  • Hippocampal engagement patterns differed in relation to false memory formation, reflecting developmental changes in mnemonic breadth.
  • Early adoption of adult-like hippocampal engagement patterns was detrimental to children's memory performance.

Conclusions:

  • Memory precision is refined through developmental changes in the entire hippocampal long axis.
  • Age-specific recruitment of hippocampal subregions influences memory precision and susceptibility to false memories.
  • Understanding these developmental shifts is crucial for comprehending memory maturation.