Thalamocortical Relay Neurons: Antidromic Invasion of Spikes from a Cortical Epileptogenic Focus

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Science  28 Apr 1972:
Vol. 176, Issue 4033, pp. 424-426
DOI: 10.1126/science.176.4033.424


Thalamocortical relay neurons whose axons project into a penicillininduced cortical epileptogenic focus generate bursts of action potentials during spontaneous interictal epileptiform discharges. These bursts originate in intracortical axons and propagate antidromically into thalamic neurons. Repetitive spike generation in cortical axons and presynaptic terminals could produce a potent excitatory drive and contribute to the generation of the large depolarization shifts which are seen in cortical elements during focal epileptogenesis.