This is a single-blind, open-label pilot study to evaluate the feasibility and preliminary efficacy of remotely supervised, at-home delivery of tVNS in individuals with moderate to severe TBI during the post-acute recovery phase. Eligible participants will complete a 2-week tVNS intervention protocol at home. Mixed methods (quantitative and qualitative) will be used to evaluate outcomes. Eligible participants will be invited to initial baseline assessment and tVNS training session (Visit 1). Then, they will complete two weeks of at-home administration period. Lastly, they will return to a post- stimulation assessment (Visit 2). In the assessment sessions participants will complete tasks of set shifting and working memory, core executive functions, as well as complete surveys regarding fatigue, sleep, and overall quality of life.
