Domestic and sexual abuse can affect both mind and body in ways that last long after the event itself. Research in neuroscience suggests that trauma can change how the brain processes fear, memory, stress, and safety — and how the nervous system learns to stay on guard. Understanding that connection can help explain why healing often needs to address the whole person, not just what happened.
Brain and trauma
Amygdala
The amygdala helps detect danger and trigger survival responses. After trauma, it may become more reactive, which can show up as hypervigilance, anxiety, or difficulty feeling safe even when surroundings are calm.
The hippocampus helps organize memory and place experiences in time. Trauma can affect how this region works, which may contribute to flashbacks, intrusive memories, or the sense that the past is still happening in the present.
The prefrontal cortex supports emotional regulation, reasoning, and decision-making. During intense stress or trauma responses, activity here may decrease, making it harder to think clearly or settle strong emotions in the moment.
Often described as the body’s “fight or flight” response, this system activates when threat is perceived. Stress hormones like cortisol and adrenaline rise, heart rate and breathing quicken, and alertness increases.
When trauma is ongoing or unresolved, this response can stay switched on. That may contribute to anxiety, sleep problems, muscle tension, and emotional reactivity over time.
Parasympathetic nervous system
This side of the nervous system supports rest, digestion, recovery, and emotional settling. After trauma, it can become harder for the body to move into this restorative state — even when rest is needed.
Vagus nerve
The vagus nerve connects brain and body and plays a key role in regulation. It supports emotional balance, stress recovery, and overall physiological steadiness.
Trauma-informed yoga emphasizes safety, choice, and body awareness rather than performance. Studies suggest it may help regulate the nervous system, ease PTSD symptoms, and support emotional regulation.
Intentional breathing can influence the autonomic nervous system, helping shift the balance between stress activation and calm. Slow, steady breath patterns may support relaxation and reduce physiological stress.
Mindfulness practices have been linked to improved emotional regulation, lower stress reactivity, and changes in brain areas related to attention and self-regulation.
Sound-based practices may encourage relaxation, lower stress markers, and support meditative states by influencing nervous system activity and brainwave patterns.
Reiki is considered a complementary therapy. Research is still developing, though some studies point to possible benefits for relaxation and stress reduction.