Occipital Sharp Waves of Sleep Contrasted with Lambda Waves

Sharp positive waves from the occipital areas occurring in normal sleep were first described by Gibbs and Gibbs in 1950 (1); they were observed subsequently by other authors (2-8). We have seen these waves in the most posterior portions of the head near the mid-line, and have called them “pointes posterieures medianes” (P.P.M.) . They appeared during periods of afternoon sleep, recorded by radiotelemetry. They were studied with relation to 1) the stages of sleep at which they appeared and 2 ) their relationship to lambda waves which were later elicited from the same subjects by procedures which are especially productive of this type of activity.

[1]  M. Gershon,et al.  Eye movement potentials in the oculomotor and visual systems of the cat: a comparison of reserpine induced waves with those present during wakefulness and rapid eye movement sleep. , 1971, Brain research.

[2]  B. Cohen,et al.  Potential changes associated with rapid eye movement in the calcarine cortex. , 1971, Experimental neurology.

[3]  J. Kugler,et al.  Lambda waves during sleep. , 1971, Electroencephalography and clinical neurophysiology.

[4]  M. Jeannerod,et al.  Occipital and geniculate potentials related to eye movements in the unanaesthetized cat. , 1970, Brain research.

[5]  P. Prior,et al.  Spontaneous sleep in healthy subjects in long-term serial electroencephalographic recordings. , 1969, Electroencephalography and clinical neurophysiology.

[6]  G. Arfel,et al.  Aspects dynamiques de l'électroencéphalogramme humain. Premiers résultats d'une étude radio-télémétrique , 1969 .

[7]  O. Benoit,et al.  Individualisation d'un sommeil ondes lentes et activit phasique , 1967 .

[8]  G. Chatrian,et al.  Electrographic patterns of the occipital lobe in man: a topographic study based on use of implanted electrodes. , 1962, Electroencephalography and clinical neurophysiology.

[9]  B. Schwartz.  EEG et mouvements oculaires dans le sommeil de nuit , 1962 .

[10]  M. Roth,et al.  The Lambda Wave as a Normal Physiological Phenomenon in the Human Electroencephalogram , 1953, Nature.

[11]  C C EVANS,et al.  Spontaneous excitation of the visual cortex and association areas; lambda waves. , 1953, Electroencephalography and clinical neurophysiology.

[12]  J. Kugler.  Probleme der elektroenzephalographischen Schlafdeskription , 1969 .