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Related Experiment Video

Updated: Jun 2, 2026

Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording

Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording

Published on: August 11, 2019

Gap junctions between interneurons are required for normal spatial coding in the hippocampus and short-term spatial

Kevin Allen¹, Elke C Fuchs, Hannah Jaschonek

¹Department of Clinical Neurobiology, Heidelberg University and German Cancer Research Center, 69120 Heidelberg, Germany.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience

|April 29, 2011

Summary

This summary is machine-generated.

Electrical coupling via connexin 36 (Cx36) in interneurons is crucial for spatial memory. Cx36(-/-) mice show impaired spatial coding and short-term memory, but intact long-term memory.

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Last Updated: Jun 2, 2026

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Published on: August 11, 2019

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Published on: September 30, 2014

Biocytin Recovery and 3D Reconstructions of Filled Hippocampal CA2 Interneurons

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Published on: November 20, 2018

Area of Science:

Neuroscience
Cellular Neuroscience
Cognitive Neuroscience

Background:

Gap junctions containing connexin 36 (Cx36) electrically couple interneurons, synchronizing their activity.
This electrical coupling is vital for neural network function in various brain regions.

Purpose of the Study:

To investigate the role of Cx36-mediated electrical coupling in hippocampal spatial coding.
To examine the impact of Cx36 deletion on hippocampus-dependent spatial memory.

Main Methods:

Utilized connexin-36 knock-out (Cx36(-/-)) mice.
Recorded neural activity in behaving mice, including spatial selectivity of pyramidal neurons and theta oscillations.
Assessed spatial memory using behavioral tasks.

Main Results:

Cx36(-/-) mice exhibited reduced and less stable spatial selectivity in hippocampal pyramidal neurons.
Network activity alterations included slower theta oscillations and altered theta phase precession dynamics.
Behaviorally, Cx36(-/-) mice showed impaired short-term spatial memory but normal spatial reference memory.

Conclusions:

Electrically coupled interneurons play a significant role in hippocampal spatial coding and cognitive functions.
Precise spatial selectivity of place cells is not essential for all forms of spatial memory, particularly associative long-term memory.