This study is exploring a new way to help people who have experienced a traumatic event, such as a bad accident or scary situation, to reduce the chances of developing post-traumatic stress disorder (PTSD). PTSD is a condition where people relive scary experiences over and over. The researchers are using a method called "non-invasive neuromodulation" which is a safe and painless way to change how the brain processes memories, especially those related to fear. The study aims to see if this method can stop fear memories from forming, which may help prevent PTSD. Key Points:

• The study involves a safe and non-painful procedure.
• Participants need to be diagnosed with PTSD or meet other specific criteria.
• Participants cannot have certain medical conditions or be taking specific medications.