Figure 7.

Rat cortex spike recordings. (A) Distribution of units found over the implantation of 1300 microwires in the rat cortex. The circular shaded region shows the location of the craniotomy and the brain region that was implanted, and the map shows channels with 0–3+ spike clusters. (B) Example autocorrelogram from specific highlighted units, showing the emergence of well isolated single units. (C) A total of 791 single units as shown by the spike raster were found in the recording with good temporal dynamics associated with neuronal firing under anesthesia. (D) Example post-stimulus time histograms responses of single units in the somatosensory cortex to auditory pink noise stimuli (red bar). A latency of around 200 ms is observed, as expected from somatosensory neurons responding to auditory stimuli [63].