The aim of this study is to use magnetic resonance imaging (MRI) to capture images of participants' brains and apply an image processing method called INSCAPE to assess brain states. This study will recruit participants who are scheduled to receive accelerated Transcranial Magnetic Stimulation (TMS) therapy for Major Depressive Disorder (MDD). Participation in this study involves two visits, each including a 30-minute MRI scan. The interval between each visit is about one week. Depressed participants will also complete mood assessments at various intervals while they are receiving accelerated TMS for depression.

The purpose of this study is to explore whether 4 weeks of at-home transcutaneous auricular neurostimulation (tAN) can reduce chronic pain after a stroke. We will recruit up to 24 participants with chronic post-stroke upper extremity pain. The goal is to determine if there is a pain reduction after ear stimulation.