Following stroke, communication between brain areas and to the lower limbs can be compromised, leading to impairments in walking ability. Paired associative stimulation (PAS), a method of non-invasive brain stimulation, is thought to be a useful tool in understanding the relationship between different parts of the brain, and functional ability. However, PAS protocols have not been optimized for use post-stroke. The purpose of this research study is to determine the reliability and effectiveness PAS. This study involve individuals >6 months after having a stroke.

This is a research study to find out if anxiety in patients with autism spectrum disorder are affected by a form of ear stimulation called transcutaneous auricular vagus nerve stimulation, or taVNS. Participants will learn how to self-administer ear stimulation treatments at home before starting the study. Over the course of a month, participants will self-administer ear stimulation treatments twice a day for a month. Each treatment will last up to 60 minutes (1 hour) and there will be a break of at least 30 minutes in between treatments. The study team will ask participants to complete a group of questionnaires at the beginning and end of the study. There will also be a smaller number of questionnaires completed electronically on a weekly basis. The questionnaires will ask questions about mental health symptoms that subjects may or may not be experiencing, including questions about mood, anxiety, and sleep.