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Related Concept Videos

Role of Hippocampus in Memory01:19

Role of Hippocampus in Memory

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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Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
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Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording
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Relationship between cognition function and hippocampus structure after long-term microwave exposure.

Li Zhao1, Rui Yun Peng, Shui Ming Wang

  • 1Beijing Institute of Radiation Medicine, Beijing 100850, China.

Biomedical and Environmental Sciences : BES
|September 25, 2012
PubMed
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Long-term microwave exposure significantly impairs rat learning and memory. This cognitive decline is linked to hippocampal damage and altered neurotransmitter levels, suggesting potential risks from microwave radiation.

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Investigations on Alterations of Hippocampal Circuit Function Following Mild Traumatic Brain Injury
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Last Updated: May 18, 2026

Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording
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Investigations on Alterations of Hippocampal Circuit Function Following Mild Traumatic Brain Injury
10:59

Investigations on Alterations of Hippocampal Circuit Function Following Mild Traumatic Brain Injury

Published on: November 19, 2012

Area of Science:

  • Neuroscience
  • Toxicology
  • Biophysics

Background:

  • Microwave exposure is increasingly prevalent.
  • Potential health effects, particularly on the brain, require thorough investigation.

Purpose of the Study:

  • To investigate the impact of chronic microwave exposure on rat hippocampal structure and function.
  • To assess changes in learning, memory, and neurotransmitter levels.

Main Methods:

  • 184 male Wistar rats were exposed to daily microwave radiation (2.5, 5, 10 mW/cm2) for one month.
  • Learning and memory assessed using the Morris water maze.
  • Hippocampal neurotransmitters and structure analyzed via HPLC and histopathology.

Main Results:

  • Significant decreases in learning and memory observed across all exposure groups.
  • Alterations in hippocampal neurotransmitter concentrations (glutamate, aspartic acid, glycine, GABA).
  • Histopathological evidence of neuronal degeneration, enlarged perivascular spaces, and mitochondrial/ER damage.

Conclusions:

  • Long-term microwave exposure induces hippocampal injury in rats.
  • Cognitive deficits may result from microwave-induced neurotransmitter disruption and cellular damage.