Fig. 4

Failure of spontaneous synchronous population activity spread in disinhibited coronal slices of claustrum. a Evoked population discharge in claustrum appears on a single electrode (stimulating electrode poles are visible dorsal to electrodes 7 and 8). b Spontaneous synchronous population activity appearing on the same channel. c. Image of brain slice and 64 recording channels (small black dots). Large black dots mark those channels that are within the main part of claustrum. Channel 13 contacts the unstained region, channel 37 contacts a transitional zone between the claustrum and endopiriform nucleus, and channel 45 samples the endopiriform nucleus. d Latexin-stained coronal section corresponding to the brain slice shown. AC anterior commissure, EC external capsule, OT optic tract, CLA claustrum, and EndP endopiriform nucleus. Details of the degree of claustral involvement in synchronous activity appear in the text