Definition reprinted with permission from Culebras, Antonio, Clinical Handbook of Sleep Disorders, Butterworth-Heinemann
The effect of the environment and polysomnographic recording apparatus on the quality of the subject's sleep the first night of recording. Sleep is usually of reduced quality compared to that which would be expected in the subject's usual sleeping environment, without electrodes and other recording procedure stimuli. The subject usually will habituate to the laboratory by the time of the second night of recording.
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