Inclusion Criteria:  Male or female between the ages of 50 and 90 years Bereavement >12 months Score >25 on the Inventory of Complicated Grief (ICG) Presence of PGD Adequate visual and auditory acuity  Exclusion Criteria:  Delirium/unstable medical conditions Lifetime history of neurological illnesses: seizures, stroke, dementia of any etiology, severe head injury, brain tumor or surgery Serious back, joint or neck injuries within the past 3 months Currently practicing yoga Gross structural abnormalities on T1-weighted images Lifetime history of the following psychiatric disorders: bipolar or psychotic disorders, including psychotic depression Current alcohol/drug abuse or dependence Magnetic resonance imaging (MRI) contraindications Acute suicidality