Neurology diagnoses and treats disorders of the nervous system, including the brain, spinal cord, and nerves, as well as thought and memory.
Send us all your questions or requests, and our expert team will assist you.
Diagnosing issues within the framework of psychoneuroimmunology is challenging because it requires looking beyond standard medical silos. Conventional medicine typically separates the mind (psychiatry) from the body (internal medicine), but PNI assessment requires a simultaneous evaluation of both. There is no single “PNI test”; rather, it involves a comprehensive collection of biological, psychological, and functional data to build a profile of the patient’s regulatory systems.
The assessment aims to identify “allostatic load.” Allostasis is the process of achieving stability through change (adaptation). Allostatic load refers to the cumulative wear and tear on the body that accumulates when the adaptive systems (HPA axis, autonomic nervous system) are chronically overused or dysregulated. The diagnostic goal is to quantify this load.
Blood tests in PNI go beyond the standard complete blood count. Clinicians look for markers of subclinical, chronic inflammation. High sensitivity C Reactive Protein (hs CRP) is a key marker. Unlike standard CRP which detects acute infection, hs CRP detects low grade systemic inflammation often driven by stress and lifestyle factors, which predicts cardiovascular and depressive risk.
Cytokine profiling is becoming more available in specialized settings. Measuring levels of IL 6, TNF alpha, and IL 1 beta can confirm an “inflammatory phenotype.” Elevated levels of these cytokines in the absence of an active infection suggest that the immune system is being driven by other factors, such as stress, visceral fat, or leaky gut.
Viral titers are also assessed, specifically for latent viruses like Epstein Barr Virus (EBV), Cytomegalovirus (CMV), and Herpes Simplex. Consistently high antibody titers against these latent viruses suggest that the cellular immune system is suppressed or exhausted (often due to stress), allowing the viruses to reactivate and replicate subclinically.
Assessing the HPA axis requires looking at cortisol, but a single blood draw is often insufficient because cortisol pulses throughout the day. The gold standard in PNI is the “Diurnal Cortisol Curve,” usually measured via saliva samples taken at four points during the day: waking, 30 minutes later, afternoon, and bedtime.
This profile reveals the “Cortisol Awakening Response” (CAR). A blunted CAR indicates a system that is exhausted or “burnt out,” while an exaggerated CAR suggests ongoing acute stress anticipation. A flattened curve, where cortisol is low in the morning and high at night, correlates strongly with fatigue, insomnia, and breast cancer mortality outcomes.
Neurotransmitter metabolites can also be measured in urine to assess the sympathetic nervous system activity. Elevated levels of catecholamine metabolites (like VMA or HVA) indicate a state of chronic sympathetic overdrive, or a “tired but wired” state where the fight or flight system never truly rests.
Heart Rate Variability (HRV) is one of the most powerful non invasive tools for assessing PNI status. HRV measures the variation in time between heartbeats. A high variability indicates a flexible, healthy autonomic nervous system with good vagal tone (parasympathetic activity). Low variability indicates a system stuck in sympathetic overdrive, rigid and unable to adapt to stress.
HRV is a direct proxy for the “inflammatory reflex.” The vagus nerve controls inflammation; therefore, low HRV is strongly correlated with high inflammatory markers and poor health outcomes. Biofeedback devices allow clinicians to measure this in real time and track improvements over time.
Gut microbiome analysis is increasingly used. Stool testing can reveal dysbiosis (imbalance of bacteria) and the presence of inflammatory markers like Calprotectin or Secretory IgA. Low levels of Secretory IgA indicate a compromised mucosal immune system, often resulting from chronic stress impacting the gut lining.
The “Psycho” part of PNI requires rigorous psychological evaluation. Clinicians use validated scales to measure perceived stress, not just the presence of stressors. The Perceived Stress Scale (PSS) helps quantify how unpredictable and uncontrollable the patient finds their life, which correlates better with immune function than the actual number of stressful events.
Assessment of “Adverse Childhood Experiences” (ACE score) provides context for the patient’s baseline inflammatory state. Screening for depression, anxiety, and social isolation is mandatory. Furthermore, assessing “coping styles” is crucial—distinguishing between active coping (problem solving) and passive coping (avoidance), as passive coping is linked to worse immune outcomes.
Sleep quality is assessed not just by hours slept, but by architecture. Questionnaires like the Pittsburgh Sleep Quality Index (PSQI) or data from wearable sleep trackers help identify fragmentation. Poor sleep efficiency is a primary driver of IL 6 elevation, making this a critical data point in the PNI workup.
Send us all your questions or requests, and our expert team will assist you.
Saliva allows us to take multiple samples at home throughout the day to see the daily rhythm of the hormone, whereas a blood draw is just a single snapshot and the needle stick itself causes stress.
HRV is the measurement of the tiny time differences between heartbeats; a higher variability means your nervous system is balanced and resilient, while low variability means you are stressed and inflamed.
While there is no “stress meter,” high levels of inflammatory markers like CRP or altered ratios of white blood cells can show the biological effect that chronic stress is having on your body.
Trauma experienced in childhood (ACEs) can permanently reset your stress response system, making you more likely to have inflammation and immune problems as an adult.
This is when viruses like Epstein Barr, which usually sleep harmlessly in your body, wake up and start replicating because your immune system is too suppressed by stress to keep them down.
Your Comparison List (you must select at least 2 packages)
