from Section I - Historical context
Published online by Cambridge University Press: 07 September 2011
Summary
Withdrawal from the influence of the outside world seemed a reasonable explanation for the onset of sleep for many years. This view, the passive theory of sleep, held sway despite some evidence to the contrary from lesion and stimulation studies as well as the effects of natural disease of the hypothalamus. Discovery of the ascending reticular activating system did not demolish this idea; for this system was considered merely to transmit the effects of sensory withdrawal, a role previously assigned to long ascending pathways. Even the 1953 discovery of REM sleep, which presented features different from “classical” sleep, could not convince some to abandon the passive theory. By the end of the decade, though, so much evidence for complexity in the organization of sleep and wakefulness had accumulated, including the demonstration of REM sleep in decerebrate cats, that the active theory of sleep finally prevailed.
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