Method for reliably recording geniculate spikes during paradoxical sleep in the cat.
A simple procedure is described which allows an investigator to implant electrodes which will reliably record phasic spikes in the lateral geniculate nucleus during paradoxical sleep. This procedure relies on recording photically evoked activity during the implantation of the geniculate electrode and the fact that the distribution of such activity and phasic spikes during paradoxical sleep overlap within the lateral geniculate nucleus. The largest geniculate spikes were recorded during paradoxical sleep when an electrode recorded a large initially positive photically evoked potential and was positioned in the optic tract just ventral to the lateral geniculate nucleus.
D000818:Animals; D002415:Cats; D004567:Electrodes, Implanted; D004569:Electroencephalography / Q000295:instrumentation*; D005829:Geniculate Bodies / Q000502:physiology*; D010775:Photic Stimulation; D012895:Sleep, REM / Q000502:physiology*; D013238:Stereotaxic Techniques