Sleep research: scientist studying a print-out in the control room of the sleep research laboratory at CHU,Toulouse,France. Here,scientists & doctors examine the different stages of sleep with the aid of a polysomnograph,a hybrid of an electrocardiograph (ECG),electroencephalograph (EEG) and electromyograph (EMG). These various instruments produce traces that relate to the activity of the heart (ECG),brain (EEG) and facial muscles (EMG),which vary with time & in different subjects. The monitors in background display the sleeping subjects; each bedroom is equipped with an infra-red camera for continuous,non-intrusive surveillance | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Plailly, Philippe |
Bildgröße: | 3954 px × 2627 px |
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