In the current study, we use MR microscopy and superfusion techniques to investigate changes in the diffusion properties of living, hippocampal neurons following activation with kainate. Acute hippocampal slice preparations (n = 6) were imaged at six different b values (b = 0 to 3200 s/mm2) both before and after exposure to kainate (100mM). Significant activation-based changes (p = 0.0043) in diffusion properties were detected in the stratum pyramidale: the tissue lamina comprised primarily of pyramidal neuron cell bodies. No changes were observed in either the strata oriens (apical dendrites) or radiatum (axons).
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