Glossary Resources MedlinePlus Medical Dictionary ClinicalTrials.gov: Glossary of Common Site Terms Terms Biomarkers Bipolar Disorder (BPD, BD) Clinical trial Electroencephalography (EEG) Healthy volunteers Magnetic Resonance Imaging (MRI) Magnetoencephalography (MEG) Major Depressive Disorder (MDD, UP) Outpatient Polysomnography