20 subjects were analysed in a laboratory study investigating the inhibition of drowsiness by altering air temperature. The EEGs of the subjects were used to measure the effect of sequences of temperature lowerings of 10° for 2- and 4-min. periods. The effect upon wakefulness was analysed through EEG recordings and subjective ratings. Results indicated that reductions of the air temperature of 10° during repeated 2- and 4-min. periods significantly increased wakefulness.
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