Neurobiology of Pain: 

Condition or Process?

Oxidative stress and systemic inflammation contribute to chronic pain through bidirectional mechanisms that contribute to neuroinflammation, central and peripheral sensitization —creating self-sustaining pain circuits. In addition, mitochondria dysfunction also contributes to chronic pain and central sensitization.

In order to establish a new paradigm for pain management, in addition to focusing on treatment of chronic pain conditions like arthritis or neuropathy, it is also important to focus on the these processes that contribute to chronic pain. However, these processes also represent individual conditions as well –  Process or Condition?

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Definitions and Terms Related to Pain

Oxidative Stress, Neuroinflammation, Systemic Inflammation, and Mitochondrial Dysfunction –  Condition or Process?

1. Oxidative stress is both a process (an imbalance between free radicals and antioxidants) and a condition (a state of cellular imbalance leading to damage) that contributes to various diseases, acting as a fundamental biological mechanism underlying aging and many pathological states like cancer, heart disease, and neurodegeneration. It’s a dynamic interplay where normal metabolic byproducts (ROS) overwhelm the body’s defenses, damaging cellular components like DNA, proteins, and lipids, though it also plays roles in cell signaling.

Oxidative Stress as a Process

  • Imbalance: Oxidative stress a continuous chemical process resulting from too many unstable free radicals (Reactive Oxygen Species or ROS) and not enough antioxidants to neutralize them.
  • Cellular Activity: ROS are normal byproducts of metabolism, but when production spikes (due to factors like inflammation, pollution, or poor diet), the balance shifts.
  • Redox Signaling: This imbalance can trigger beneficial adaptive responses, but prolonged or excessive imbalance is harmful and contributes to chronic pain..

Oxidative Stress as a Condition

  • Cellular Damage: When defenses fail, ROS damage cells, leading to dysfunction and cell death, creating a pathological state.
  • Disease Link: This state is a precursor or contributor to numerous chronic conditions, including pain and neurodegenerative diseases (Alzheimer’s, Parkinson’s), diabetes, cardiovascular disease, and cancer.
  • Pre-Pathological: It’s often considered a “pre-pathological” state because it signals underlying issues before overt symptoms appear, impacting various systems.

In essence, oxidative stress is a fundamental biological process that, when unchecked, results in a harmful cellular condition linked to aging and disease.

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2. Neuroinflammation is fundamentally a process, the brain’s immune response, but it becomes a pathological condition when it’s prolonged, excessive, or dysregulated, driving or worsening chronic pain and neurological diseases like Alzheimer’s, MS, stroke, and depression. It’s a dual-natured response: protective and essential for repair in short bursts, but damaging and chronic when maladaptive.

Neuroinflammation as a Process 

  • Defense Mechanism: Neuroinflammation is the brain’s way of fighting pathogens, toxins, or injury.
  • Tissue Repair: Helps clear debris, promote neural plasticity, and rebuild damaged areas.
  • Triggers: Activated by infections, trauma, protein aggregates (like in Alzheimer’s), or aging.

Neuroinflammation as a Condition 

  • Chronic Inflammation: When the response doesn’t turn off, neuroinflammation becomes destructive.
  • Drives Disease: Contributes to the progression of chronic pain and neurodegenerative diseases (Alzheimer’s, Parkinson’s) and psychiatric disorders (schizophrenia, depression).
  • Cellular Damage: Leads to the release of harmful mediators, damaging neurons, myelin, and impairing brain function.

In essence, neuroinflammation is a biological process) that, depending on its duration and intensity, can either maintain brain health or cause disease (condition).

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3. Systemic Inflammation is fundamentally a biological process, the body’s widespread immune response to danger, but it becomes a serious pathological condition (like SIRS or chronic inflammation) when it’s excessive, dysregulated, or prolonged, leading to tissue damage, organ dysfunction and chronic pain. It’s the body’s way of fighting infection or injury, but if it doesn’t shut off, it turns from a protective mechanism into a harmful state.

Systemic Inflammation as a Process:

  • Immune Activation: Triggered by pathogens, injury, or stress, it involves white blood cells, cytokines, and proteins.
  • Systemic Response: Unlike local inflammation (like a cut), it affects the entire body, causing fever, increased heart/breathing rates, and elevated white blood cell counts (leukocytosis).
  • Protective Role: It’s essential for healing and fighting invaders, increasing vascular permeability and mobilizing immune cells.

Systemic Inflammation as a Condition:

  • Chronic Inflammation: When the acute inflammatory process doesn’t resolve, it persists, contributing to chronic pain and diseases like diabetes, heart disease, autoimmune disorders, and neurodegenerative conditions.
  • Harmful State: In these cases, the body’s “healing” response starts harming healthy tissues, becoming a disease state itself.

In essence, it’s the same underlying immune cascade, but its persistence and intensity define whether it’s a normal process or a harmful condition.

See: Systemic Inflammation

 

4. Mitochondrial dysfunction is both a process, the failure of mitochondria to produce energy efficiently as a factor in chronic pain and many chronic diseases like Parkinson’s, Alzheimer’s, and diabetes. It’s a cellular problem where the cell’s “power plants” aren’t working right, causing energy deficits that manifest as various health problems.

Mitochondrial Dysfunction as a Process

  • It describes the failure of mitochondria to generate enough energy (ATP), often involving issues with the electron transport chain or increased reactive oxygen species (ROS).

Mitochondrial Dysfunction as a Condition

  • Underlying Factor in Diseases: Mitochondrial dysfunction is a common thread in many chronic conditions, including chronic pain, neurodegenerative diseases (Parkinson’s, Alzheimer’s), metabolic syndrome, heart disease (cardiomyopathies), and cancer, making it a key area for research.

In essence, dysfunction is a cellular problem, while mitochondrial disease is the diagnosis when that problem becomes severe and systemic, and it’s also a contributing process in chronic pain and many ailments.

See:  Mitochondrial Dysfunction

 

Reduceing Central Sensitization

The importance of  suppressing systemic information oxidative stress, neuronflammation and mitochondrial dysfunction lies in treating them, either as processes or as conditions, in order to reduce the severity of chronic pain evolution over time by reducing central sensitization.

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Emphasis on Education

 

Accurate Clinic promotes patient education as the foundation of it’s medical care. In Dr. Ehlenberger’s integrative approach to patient care, including conventional and complementary and alternative medical (CAM) treatments, he may encourage or provide advice about the use of supplements. However, the specifics of choice of supplement, dosing and duration of treatment should be individualized through discussion with Dr. Ehlenberger. The following information and reference articles are presented to provide the reader with some of the latest research to facilitate evidence-based, informed decisions regarding the use of conventional as well as CAM treatments.

 

For medical-legal reasons, access to these links is limited to patients enrolled in an Accurate Clinic medical program.

 

Should you wish more information regarding any of the subjects listed – or not listed –  here, please contact Dr. Ehlenberger. He has literally thousands of published articles to share on hundreds of topics associated with pain management, weight loss, nutrition, addiction recovery and emergency medicine. It would take years for you to read them, as it did him.

 

For more information, please contact Accurate Clinic.

 

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