Regional organisation of brain activity during paradoxical sleep (PS).

P. Maquet, P. Ruby, S. Schwartz, S. Laureys, G. Albouy, T. Dang-Vu, M. Desseilles, M. Boly, G. Melchior, P. Peigneux


Human brain function is regionally organised during paradoxical sleep (PS) in a very different way than during wakefulness or slow wave sleep. The important activity in the pons and in the limbic/paralimbic areas constitutes the key feature of the functional neuroanatomy of PS, together with a relative quiescence of prefrontal and parietal associative cortices. Two questions are still outstanding. What neurocognitive and neurophysiological mechanisms may explain this original organization of brain function during PS? How the pattern of regional brain function may relate to dream content? Although some clues are already available, the experimental answer to both questions is still pending.

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