Inclusion

• Between 18 and 50 years old
• Veteran
• Meets PTSD criteria (consider a combination of the following):
  • PTSD dx
  • Meets criteria for all PTSD DSM-5 criteria on CAPS-5 (A-E) and symptoms have lasted for at least one month

Exclusion

• TBI < 6 months ago
• Current significant neurologic (e.g., dementia, stroke) or psychiatric illness (e.g., bipolar disorder, schizophrenia)
• History of major psychiatric illness prior to PTSD (e.g., bipolar disorder, schizophrenia)
• Untreated sleep apnea
• Habitual sleeping conditions that cannot be realistically recreated
• Prescribed medications that can interfere with the autonomic nervous system
• Current illicit or prescription drug abuse
• Current marijuana or alcohol use beyond low risk
• Currently pregnant