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Figure 4Rhombencephalic phase of sleep in a decorticate cat (X1)The two recordings are continuous. Appearance of a spindle-like activity in the nucleus pontis caudalis (F.Rp) and concomitant disappearance of the EMG activity of neck muscles (EMG). Note the absence of slow waves m the subcortical structures before the rhombencephalic sleep. Numbers (1-2), (2-3) refer to bipolar recording through inferior (1), middle (2) and superior (3) leads of a tripolar electrode. F.Rm: mesencephalic reticular formation. Th: thalamus median. HypoT: lateral hypothalamus. Scale: 1 sec., 50 microvolts. |