Understanding PTSD: Who It Affects, What Happens in the Brain, and How Healing Happens
Post-Traumatic Stress Disorder (PTSD) is often misunderstood. For many years, it was primarily associated with combat veterans returning from war. While military trauma remains an important area of focus, we now understand that PTSD can develop after any experience of overwhelming threat, harm, or helplessness — regardless of age, gender, background, or life circumstance.
Children exposed to chronic stress or neglect, individuals who survive accidents or assaults, people who experience medical trauma, and those with a family history of trauma-related disorders are all at increased risk. Women, in particular, experience higher rates of PTSD due to increased likelihood of interpersonal trauma.
This broader understanding has helped dismantle harmful stereotypes. PTSD is not a sign of weakness. It is a neurobiological response to trauma — and it deserves compassionate, evidence-based care.
To explore PTSD more deeply, we spoke with Dr. Rohit Aiyer, M.D., board-certified psychiatrist and founder of Mind & Brain Link.
Q1: Many people still associate PTSD only with war veterans. What do we now understand about who can develop PTSD?
Dr. Aiyer:
“Historically, PTSD was closely linked to combat exposure, but we now know that trauma comes in many forms. Childhood adversity, sexual or physical assault, domestic violence, serious accidents, medical trauma, or sudden loss can all lead to PTSD. There are also genetic and familial vulnerability factors. Thankfully, public understanding has expanded significantly in recent years.”
Trauma is defined not only by the event itself, but by the nervous system’s response to the event. What overwhelms one person’s capacity to cope may not overwhelm another’s — and that difference is shaped by genetics, early environment, support systems, and prior stress exposure.
Recognizing this has helped reduce stigma and encouraged more individuals to seek support.
Q2: Can you share more about the neurochemistry behind PTSD?
Dr. Aiyer:
“Absolutely. There have historically been a lot of misconceptions around PTSD. Today, thanks to advances in neuroscience, we understand much more about how trauma affects the brain.”
“When PTSD develops, we see changes in several key brain systems. There is often decreased serotonin activity linked to alterations in the dorsal and median raphe nuclei. The Hypothalamic-Pituitary-Adrenal (HPA) axis, which controls the stress response, becomes dysregulated, leading to abnormal cortisol signaling. Dopamine and norepinephrine levels also increase, keeping the brain in a heightened state of alert. Additionally, we see reduced volume and activity in the prefrontal cortex, which is responsible for emotional regulation and rational processing.”
“That may sound very technical, but essentially PTSD changes how the brain processes threat, memory, and emotion.”
Making Sense of the Science
To put this more simply:
The amygdala (fear center) becomes overactive
The prefrontal cortex (thinking and regulation center) becomes less effective
The hippocampus (memory center) may struggle to distinguish past from present
Stress hormones stay elevated
Neurotransmitters involved in mood and alertness become imbalanced
The result is a brain that remains stuck in survival mode, even when danger has passed.
This is why people with PTSD may experience:
Flashbacks or nightmares
Hypervigilance
Sudden panic responses
Emotional numbness
Avoidance behaviors
Difficulty sleeping or concentrating
Importantly, these symptoms are not a character flaw. They are the brain’s attempt to protect itself after trauma.
Q3: Does this mean PTSD symptoms are “hardwired” once trauma occurs?
Dr. Aiyer:
“Not at all. The brain is highly adaptable. Neuroplasticity — the brain’s ability to form new neural pathways — allows healing to take place. Treatment helps retrain the nervous system to recognize safety again.”
This is a crucial message. PTSD is not a life sentence. With appropriate care, the brain can reorganize and recover.
Q4: Is there a gold standard treatment for PTSD?
Dr. Aiyer:
“There isn’t a single treatment that works for everyone. PTSD responds best to a multimodal approach. Trauma-focused cognitive behavioral therapy is an excellent starting point. This therapy works with neuroplasticity — helping the brain build new, healthier associations with memories and triggers.”
“From a medication perspective, Selective Serotonin Reuptake Inhibitors (SSRIs) are commonly used. Zoloft (Sertraline) and Paxil (Paroxetine) are FDA-approved for PTSD. Other SSRIs such as Lexapro (Escitalopram) or Prozac (Fluoxetine can also be effective. Medication helps regulate the neurochemical imbalances we discussed earlier, making therapy more accessible.”
“Support groups are also incredibly valuable. Trauma can feel isolating. Connecting with others who understand helps restore a sense of safety and belonging.”
Other Effective Treatment Modalities
In addition to CBT and medication, many individuals benefit from:
EMDR (Eye Movement Desensitization and Reprocessing)
Somatic therapies focused on nervous system regulation
Mindfulness and grounding practices
Trauma-informed yoga or movement
The best treatment plan is personalized. There is no one-size-fits-all path to healing.
Q5: What are common PTSD triggers?
Dr. Aiyer:
“There are both internal and external triggers. Internally, feelings like loneliness, frustration, guilt, or certain memories can activate trauma responses. Externally, specific places, people, dates, smells, sounds, or news events can create a sense of re-experiencing.”
“Unfortunately, we can’t always control what happens in the outside world. But through treatment, we can strengthen a patient’s inner world — improving resilience and overall quality of life.”
Triggers are not signs of failure. They are reminders that the nervous system still associates certain cues with danger. With healing, these reactions gradually soften.
Living With PTSD: The Human Experience
Beyond the clinical definitions, PTSD is a deeply human experience.
Many individuals describe:
Feeling disconnected from themselves
Difficulty trusting others
Emotional numbness
Sudden bursts of fear or anger
A constant sense of being “on edge”
These experiences can impact relationships, work, parenting, and self-esteem. Many people hide their symptoms for fear of being misunderstood.
That’s why compassionate, stigma-free spaces for care matter.
When to Seek Help
If you or someone you know experiences:
Persistent nightmares or flashbacks
Avoidance of reminders of trauma
Hypervigilance or exaggerated startle response
Emotional numbness
Sleep disruption
Persistent guilt or shame
It may be time to reach out for support.
You do not have to handle trauma alone.
A Message of Hope
PTSD can feel overwhelming — but healing is possible. The brain can learn safety again. Memories can lose their emotional charge. Life can become spacious, meaningful, and connected once more.
Seeking help is not weakness.
It is courage.
Reach Out
If you or someone you know is navigating recovery from PTSD, don’t hesitate to reach out to book an appointment with us here.
