Related Experiment Video
Updated: Jul 20, 2026

Polygraphic Recording Procedure for Measuring Sleep in Mice
Published on: January 25, 2016
Dynamic functional MRI markers of drowsiness during sleep onset period
Ivan Igor Gaez1, Elpidio Attoh-Mensah2, Clément Nathou1
1Normandie Université, UNICAEN, INSERM, COMETE, CYCERON, CHU Caen, Caen, France.
None:
The present use of ocular activity to enhance the temporal resolution of the classification of sleep onset period (SOP) allowed to reveal an increase in the power of oscillations in the BOLD signal at 0.05 Hz in the brain, particularly in sensory cortices, as soon as the first signs of drowsiness. These changes were evident in the "likely drowsy" state of SOP, representing early sleep-related vigilance fluctuations, often encountered even during activities like driving. Our findings show changes in the BOLD signal even before conventional indicators of sleep onset.
Related Concept Videos
Magnetic Resonance Imaging
Brain Imaging
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans), magnetic resonance imaging (MRI), functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).
Stages of Sleep
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...
REM Sleep Behavior Disorder
RBD is significantly associated with...
Imaging Studies for Cardiovascular System IV: CMRI

