Post-Traumatic Stress Disorder (PTSD) is a mental health condition that can develop after someone experiences or witnesses a very stressful, frightening, or life-threatening event. This can happen after accidents, abuse, natural disasters, or war. For those with PTSD, memories of the event do not fade. It feels like the brain keeps returning to that moment, as if the danger never ended. https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.academia.edu%2F14545805%2FThe_weaker

Different anesthetics, though acting via distinct pathways, converge on a shared effect: re-aligning brain oscillations. Both ketamine and dexmedetomidine increased low-frequency synchronization across hemispheres while fragmenting within-hemisphere communication. These dose-dependent phase shifts may represent a common mechanism for loss of consciousness and offer potential biomarkers for anesthesia depth.