The Neurobiological Impact of Psychological Trauma: HPA Axis Dysfunction, Anxiety, and Depression

This podcast episode, hosted by DocSnipes, delves into the intricate neurobiological impact of psychological trauma, focusing primarily on the Hypothalamic-Pituitary-Adrenal (HPA) axis, or the body's threat response system. It distinguishes between trauma and traumatic injury, emphasizing that individual responses vary significantly based on factors like perception of the stressor, proximity to safe zones, similarity to victims, degree of helplessness, age, prior trauma history, preceding stress levels, current mental health, and social support. The presentation highlights that neurobiological abnormalities in trauma, including physiological changes like hippocampal shrinkage, can overlap with features of traumatic brain injury, underscoring the profound physical effects of psychological distress.

The core of the discussion revolves around HPA axis dysfunction, explaining how chronic activation leads to persistent high cortisol levels (hypercortisolism), which initially aids survival but eventually causes widespread problems. These include digestive issues, suppressed immune function, altered mood and emotions (reduced serotonin/GABA, increased norepinephrine/glutamate), decreased pain thresholds, and disrupted energy regulation (e.g., blood sugar control). The episode further explores the body's adaptive response to prolonged hyperactivation, leading to hypocortisolism or glucocorticoid resistance, a protective mechanism to conserve energy. This state, however, often results in emotional flatness, apathy, and later, exaggerated stress responses, creating a 'flatter-furious' dynamic.

Practical insights for intervention are provided, stressing the critical role of social support, especially within the first 24-72 hours post-trauma, to prevent compartmentalization and facilitate processing. The speaker advocates for a holistic approach to re-regulate the HPA axis, encompassing improved sleep, nutrition, cognitive strategies, and stress reduction. Therapeutic techniques like emotion regulation and distress tolerance skills are crucial for managing the resulting emotional dysregulation and excitotoxicity (excess glutamate/norepinephrine), which impair learning and memory. The importance of helping clients identify endpoints, track progress, and foster a survivor mentality is also emphasized to combat fatigue and maintain motivation.

Broader implications extend to understanding the physiological underpinnings of conditions like chronic fatigue syndrome, burnout, autoimmune issues, and even diabetes management in trauma survivors. The episode underscores that HPA axis dysregulation can occur independently of a PTSD diagnosis, necessitating a broader view of traumatic injury. It highlights that core changes in dozens of hormones and neurotransmitters (catecholamines, serotonin, GABA, glutamate) are involved, impacting everything from impulsivity and aggression to learning and memory. The ultimate message is that while recovery is a gradual process, akin to losing significant weight, consistent effort in rebalancing the HPA axis through lifestyle changes and therapeutic interventions can significantly improve long-term well-being.

every trauma impacts every person differently at every point in time

neurobiological abnormalities in PTSD or trauma overlap with the features found in traumatic brain injury

social support in the first 24 hours is the most critical if somebody gets social support in the first 24 hours it helps them process what's going on before they start compartmentalizing it

the signs and symptoms of PTSD reflect persistent adaptations of the body systems the neurobiological systems to the experience trauma and you notice I crossed out the word abnormal adaptations it is a very normal adaptation

somebody who has a persistently activated HPA axis may have digestive problems reduced immunity mood issues coz that serotonin and gaba is not helping to help the person feel calm and happy and relaxed and all those things

hypocortisolism is seen in stress-related disorders such as chronic chronic fatigue syndrome burnout and PTSD and is actually a protective mechanism designed to conserve energy during threats that are beyond the organisms ability to cope

when there is a stressor instead of having you know a little bit of cortisol dumped into the system it is wide open generally low cortisol is seen in people who have experienced extended stress as a result of trauma or chronic stress but when a threat is perceived there's an exaggerated stress response and I call this flatter furious

HPA axis can dis regulate we can have problems with it even if the person doesn't develop diagnoseable PTSD

cortisol that fight-or-flight stress hormone interestingly says you know what you really don't want to remember that so it prevents some of our traumatic memories from being solidified if you will

it's kind of like gaining weight think about if you gain a hundred pounds you're not going to lose a hundred pounds in two three weeks what they're carrying is a hundred pounds of stress if you want to look at it that way and it's going to take time of living right reducing their stress practicing some of the tools that they learn and counseling and dealing with any remaining traumatic memories that they've got in those boxes in order to help them reregulate that HPA axis