Optical imaging of acute epileptic networks in mice

J Biomed Opt. 2013 Jul;18(7):76021. doi: 10.1117/1.JBO.18.7.076021.

Abstract

The potential of intrinsic optical imaging and resting-state analysis under anesthetized conditions as a tool to study brain networks associated with epileptic seizures is investigated. Using an acute model of epileptiform activity, the 4-aminopyridine model in live mice, we observe the changes in resting-state networks with the onset of seizure activity and in conditions of spiking activity. Resting-state networks identified before and after the onset of epileptiform activity show both decreased and increased homologous correlations, with a small dependence on seizure intensity. The observed changes are not uniform across the different hemodynamic measures, suggesting a potential decoupling between blood flow and metabolism in the low-frequency networks. This study supports the need for a more extensive investigation of epileptic networks including more than one independent hemodynamic measurement.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • 4-Aminopyridine
  • Acute Disease
  • Animals
  • Cerebral Cortex / blood supply
  • Cerebral Cortex / metabolism*
  • Cerebral Cortex / pathology*
  • Cerebrovascular Circulation / physiology
  • Epilepsy / chemically induced
  • Epilepsy / metabolism*
  • Epilepsy / pathology*
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Optical Imaging / methods*
  • Oxygen / blood
  • Oxyhemoglobins / analysis

Substances

  • Oxyhemoglobins
  • 4-Aminopyridine
  • Oxygen