Temporal Coordination of Hippocampal Neurons Reflects Cognitive Outcome Post-febrile Status Epilepticus.
The coordination of dynamic neural activity within and between neural networks is believed to underlie normal cognitive processes. Conversely, cognitive deficits that occur following neurological insults may result from network discoordination. We hypothesized that cognitive outcome following febrile status epilepticus (FSE) depends on network efficacy within and between fields CA1 and CA3 to dynamically organize cell activity by theta phase. Control and FSE rats were trained to forage or perform an active avoidance spatial task. FSE rats were sorted by those that were able to reach task criterion (FSE-L) and those that could not (FSE-NL). FSE-NL CA1 place cells did not exhibit phase preference in either context and exhibited poor cross-theta interaction between CA1 and CA3. FSE-L and control CA1 place cells exhibited phase preference at peak theta that shifted during active avoidance to the same static phase preference observed in CA3. Temporal coordination of neuronal activity by theta phase may therefore explain variability in cognitive outcome following neurological insults in early development.
Department of Neurological Sciences, University of Vermont College of Medicine, Burlington, Vermont, United States. Electronic address: Jbarry4@uvm.edu.
Jeremy M
JM
Barry
Department of Neurological Sciences, University of Vermont College of Medicine, Burlington, Vermont, United States.
Sophie
S
Sakkaki
Department of Neurological Sciences, University of Vermont College of Medicine, Burlington, Vermont, United States.
Sylvain J
SJ
Barriere
Departments of Anatomy/Neurobiology and Pediatrics, University of California-Irvine, Irvine, California, United States.
Katelin P
KP
Patterson
Mediterranean Institute of Neurobiology (INMED), U901, INSERM, Marseille, France.
Pierre Pascal
PP
Lenck-Santini
Department of Neurological Sciences, University of Vermont College of Medicine, Burlington, Vermont, United States; Department of Neurology, University College London, Institute of Child Health, United Kingdom.
Rod C
RC
Scott
Departments of Anatomy/Neurobiology and Pediatrics, University of California-Irvine, Irvine, California, United States.
Tallie Z
TZ
Baram
Department of Neurological Sciences, University of Vermont College of Medicine, Burlington, Vermont, United States.
Gregory L
GL
Holmes
D000818:Animals; D001362:Avoidance Learning / Q000502:physiology; D003071:Cognition / Q000502:physiology*; D004195:Disease Models, Animal; D006624:Hippocampus / Q000503:physiopathology*; D006801:Humans; D008297:Male; D009415:Nerve Net; D051381:Rats; D003294:Seizures, Febrile / Q000150:complications* / Q000503:physiopathology; D013226:Status Epilepticus / Q000150:complications* / Q000503:physiopathology
Cognition; Febrile status epilepticus; Hippocampal network; Temporal coordination