Repairing the Hardware: How Light Therapy Heals the Traumatized Brain For those struggling with TBIs, concussions, or the chronic stress of first responder work, the "software" is often glitchy because the "hardware" is physically damaged. A groundbreaking 2024 study published in the journal Cells has shed new light on how we can repair that hardware using Photobiomodulation (PBM)—more commonly known as medical-grade Red Light Therapy.