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The Time Course of Sleep Inertia in a Semantic Priming Paradigm
Margreet Kolff, Winni Hofman Ph.D, Gerard Kerkhof Ph.D, Anton Coenen Ph.D
The time course of ‘sleep inertia’ was studied with a semantic priming paradigm. With this
automatic spreading activation task it was found that longer reaction times on target
words after an awakening from sleep, as compared to those obtained after a period of
wakefulness, appeared only during the first 2.5 minutes. Thus, sleep inertia could be
observed but dissipated in a fast way. Moreover, no differences in sleep inertia could be
found after forced awakenings from deep slow wave sleep compared to light slow wave
sleep as well as to REM sleep. Characteristics of sleep inertia are discussed in terms of task
difficulty in relation to awakenings from a particular sleep-wake state. It is suggested that
the semantic priming task is an automatic and easy one, which is expressed in a relatively
short period of sleep inertia. (Sleep and Hypnosis 2003;5(2):78-82)
| Keywords: sleep inertia, time course, semantic priming |
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