Observational study of brain MRI techniques in healthy volunteers and people with major depressive disorder

You may qualify if

• Healthy Controls
• Male and female subjects between 18 and 65 years of age
• Subjects must be able to give written informed consent prior to participation in this study.
• Subjects who do not currently meet and have never met criteria for any major psychiatric disorder, and who have no known first degree relatives with mood disorders.
• For cognitive experiments utilizing language stimuli only native English speakers will be enrolled. Major Depressive Disorder
• Male and female subjects between 18 and 65 years of age.
• Subjects have been found eligible for other ETPB research protocols according to 01-M-0254.
• Subjects must fulfill DSM-IV or V criteria for Major Depression based on clinical assessment and confirmed by a structured diagnostic interview (SCID-P).
• Subjects must be able to give written informed consent prior to participation in this study.
• For cognitive experiments utilizing language stimuli, only native English speakers will be enrolled.

You can't join if

• Healthy Control
• Subjects with major medical or neurological disorders expected to influence cerebral blood flow or morphology, or taking any medication that is likely to influence the imaging parameters-of-interest within 3 weeks of scanning.
• Women who are pregnant are excluded from the study. Subjects will undergo pregnancy testing no more than 24 hours prior to MRI scanning.
• Subjects with contraindication to MRI scanning such as aneurysm clips, implanted neural stimulator, implanted cardiac pacemaker or auto-defibrillator, cochlear implant, or ocular foreign body.
• A history of drug or alcohol abuse within 1 year or a lifetime history of drug or alcohol dependence (DSM-IV) or alcohol use disorder (DSM-V equivalent). Major Depressive Disorder
• Presence of Axis 1 psychiatric diagnosis other than Major Depression or an Axis 2 disorder
• Subjects with major medical or neurological disorders expected to influence cognitive function or are taking any drugs likely to affect mood or cognitive function within 1 week of study participation. Depressed subjects will not be tapered/withdrawn from medications under this study.
• A history of drug or alcohol abuse within 1 year or a lifetime history of drug or alcohol dependence (DSM-IV) or alcohol use disorder (DSM-V equivalent).
• Subjects with major medical or neurological disorders expected to influence cerebral blood flow or morphology.
• Women who are pregnant or breastfeeding will be excluded from MRI portions of the study. Subjects will undergo pregnancy testing no more than 24 hours prior to MRI scanning.
• Subjects with contraindication to MRI scanning such as aneurysm clips, implanted neural stimulator, implanted cardiac pacemaker or auto-defibrillator, cochlear implant, or ocular foreign body.