Koch et al. from John Wolf’s Lab published their study on functional status of hippocampal neurons after traumatic brain injury (TBI). A NeuroNexus 32-channel probe (A1X32-Poly2-5mm-50s-177-H32) was used for laminar recording in CA1 in a rat TBI model. They reported that hippocampal CA1 single-unit activity post-TBI can maintain a normal firing rate despite significantly reduced, layer-specific loss of input. However, maintaining normal synchronization to the dominant oscillations within the hippocampus is impaired.