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Related Experiment Video

Updated: May 8, 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

Prefrontal cortex HCN1 channels enable intrinsic persistent neural firing and executive memory function.

Sébastien J Thuault¹, Gaël Malleret, Christine M Constantinople

¹Department of Neuroscience, Columbia University, New York, NY, USA.

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

|August 23, 2013

Summary

HCN1 channels are crucial for persistent firing in mouse prefrontal cortex neurons, impacting working memory. Their absence causes hyperpolarization, reducing firing but not network activity.

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Area of Science:

Neuroscience
Molecular and Cellular Biology

Background:

HCN1 channels are key to the hyperpolarization-activated current (Ih) in cortical neurons.
Ih influences neuronal intrinsic properties, synaptic integration, rhythmic activity, and plasticity.

Purpose of the Study:

Investigate the role of Ih, specifically HCN1 channels, in deep layer pyramidal neurons of the mouse prefrontal cortex (PFC).
Focus on the contribution of HCN1 to persistent activity, essential for PFC function in working memory.

Main Methods:

Examined persistent firing induced by depolarizing stimuli in the presence of muscarinic agonists.
Utilized HCN1 deletion and pharmacological blockade of Ih.
Performed in vivo recordings and behavioral studies in mice.

Main Results:

HCN1 deletion or Ih blockade reduced the capacity for intrinsic persistent firing.
This reduction was attributed to membrane hyperpolarization, not a direct role of Ih in generating persistent activity.
HCN1 deletion did not affect in vivo up states.
HCN1 deletion impaired PFC-dependent resolution of proactive interference during working memory tasks.

Conclusions:

HCN1 channels are essential for intrinsic persistent firing in PFC neurons.
HCN1 plays a significant role in the behavioral output of the PFC, particularly in working memory.
The direct causal link between intrinsic persistent firing and PFC-mediated behavior requires further investigation.