Chronic Pain Treatment: A Neurological Approach
Chronic pain treatment has to change once pain persists beyond tissue healing, because at that point it is no longer a musculoskeletal problem. It is a neurological one. When the central nervous system learns to amplify, sustain, and generate pain signals independent of peripheral input, the diagnosis belongs in neurology, and so does the treatment. We evaluate chronic pain as a disorder of the brain and spinal cord, not as a billing code for more injections.
Available at our St. Marys, Georgia clinic.
Central Sensitization: When the Brain Becomes the Pain Generator
In a healthy nervous system, pain is a proportional response to a noxious stimulus. Tissue damage activates peripheral nociceptors, the signal travels through the dorsal horn of the spinal cord, and the brain registers the experience at a level that matches the severity of the input. When the injury heals, the signal stops. That is how the system is supposed to work.
Central sensitization is what happens when it doesn’t. In this state, the dorsal horn neurons become hyperexcitable. NMDA receptors upregulate, lowering the threshold for activation. Wind-up occurs—a progressive increase in action potential firing from repeated C-fiber input that leaves second-order neurons in a state of sustained depolarization. The result is pain that persists after the peripheral stimulus has resolved, pain that spreads beyond the original injury site, and pain triggered by stimuli that should not hurt at all.
Clifford Woolf described this mechanism in his landmark 2011 review in Pain, identifying central sensitization as a distinct clinical entity driven by altered synaptic processing in the spinal cord and brain. Latremoliere and Woolf (2009, The Journal of Pain) further characterized the molecular cascades involved: phosphorylation of NMDA and AMPA receptor subunits, activation of intracellular kinase pathways including PKC and ERK, and loss of GABAergic and glycinergic inhibitory tone in the dorsal horn. These are not abstract laboratory findings. They explain why a patient’s MRI can look normal while their experience of pain is devastating.
Descending inhibition failure compounds the problem. Under normal conditions, brainstem nuclei—the periaqueductal gray, the rostral ventromedial medulla—send inhibitory signals down the spinal cord that modulate incoming pain transmission. In centrally sensitized patients, this top-down brake weakens or reverses, allowing pain signals to pass through the dorsal horn with less filtering. The patient doesn’t just feel more pain. Their nervous system has lost the capacity to turn the volume down.
This is why opioids fail in central sensitization. Opioids act primarily on mu receptors in the peripheral and central nervous system to suppress nociceptive transmission. But when pain is being generated by NMDA-driven synaptic plasticity and disinhibited spinal circuits, mu-receptor agonism does not address the mechanism. Escalating opioid doses in these patients produces tolerance and dependence without resolving the underlying neuroplastic changes that maintain the pain state.
CRPS and Neuroinflammatory Pain
Complex regional pain syndrome is among the most severe chronic pain conditions a neurologist encounters. It typically develops after an injury—a fracture, a surgery, a soft tissue trauma—and presents with pain that is wildly disproportionate to the inciting event. The affected limb may show edema, color changes, temperature asymmetry, trophic changes to the skin and nails, and motor dysfunction. In advanced cases, the pain spreads to contralateral limbs or becomes generalized.
The Budapest criteria, codified by Harden et al. (2010, Pain Medicine), established the current diagnostic framework for CRPS. Diagnosis requires continuing pain disproportionate to the inciting event, plus signs and symptoms across at least three of four categories: sensory (allodynia, hyperalgesia), vasomotor (temperature or color asymmetry), sudomotor/edema (swelling, sweating changes), and motor/trophic (weakness, tremor, dystonia, skin or nail changes). The criteria were designed to balance sensitivity and specificity, but in practice, CRPS remains underdiagnosed because many clinicians are unfamiliar with the full spectrum of its presentation.
The pathophysiology of CRPS involves a convergence of peripheral and central mechanisms. Neurogenic inflammation mediated by substance P and CGRP produces the vasomotor and sudomotor changes. Sympathetic-afferent coupling creates a loop in which sympathetic nervous system activity drives nociceptor activation. And central sensitization, the same NMDA-driven process described above, amplifies and sustains the pain signal long after the original injury has healed. Autoimmune mechanisms have also been implicated: antibodies against autonomic nervous system receptors have been identified in a subset of CRPS patients, suggesting that the immune system can directly attack the neural infrastructure that regulates blood flow and pain in the affected limb.
Evaluating CRPS properly requires a neurologist who understands both the peripheral and central components. Treating only the limb while ignoring the brain’s role in maintaining the pain state is why so many CRPS patients cycle through nerve blocks, sympathectomies, and spinal cord stimulators without meaningful relief.
Why Standard Pain Management Falls Short
The typical pain clinic operates on a procedural model. Patients arrive with pain. They receive an MRI of the relevant spine segment. If a structural abnormality is found, an injection is offered. If the injection fails, a different injection is tried, or a stimulator is discussed, or opioids are prescribed at escalating doses. The neurological workup that should precede any of these interventions is rarely performed.
This model works for acute, nociceptive pain with a clear structural generator—a herniated disc pressing on a nerve root, an inflamed facet joint, a torn rotator cuff. It fails badly when the pain is being driven by central sensitization, neuroinflammation, autonomic dysfunction, or post-traumatic neuroplastic changes. In those cases, the MRI may be unremarkable, the injections may provide only days of relief, and the patient is gradually reclassified as a chronic pain patient who “needs to manage expectations.”
The missing step is the neurological evaluation. No one has assessed whether the dorsal horn is hyperexcitable. No one has tested descending inhibition. No one has measured whether the patient’s pain thresholds have shifted in a pattern consistent with central sensitization. No one has checked autonomic function for the sympathetic dysfunction that drives CRPS. Without these data, every treatment is empirical—a guess informed by anatomy rather than by the actual mechanism producing the pain.
Post-concussive persistent pain deserves particular attention in this context. Patients with traumatic brain injury frequently develop chronic headaches, neck pain, and widespread body pain that does not respond to the musculoskeletal interventions their primary care doctors prescribe. The reason is straightforward: the pain is neurological. It is generated or amplified by injured cortical and brainstem circuits, not by damaged muscles or joints. Treating these patients in a pain clinic without a concurrent neurological evaluation is treating the symptom while ignoring the organ that produces it. Learn more about our approach to brain injury on our traumatic brain injury page.
Treatments We Use for Neurological Chronic Pain
Each therapy targets a specific mechanism in the chronic pain pathway. The combination and sequencing are determined by diagnostic findings, not by a standard protocol.
Occipital Nerve Block
Targeted peripheral nerve blocks silence specific pain generators and reduce afferent input to sensitized central circuits. Diagnostic blocks also help identify which peripheral structures are contributing to the overall pain state.
NAD+ IV Therapy
NAD+ restores mitochondrial function in neurons stressed by chronic inflammatory signaling. Adequate NAD+ levels support sirtuin-mediated anti-inflammatory pathways and cellular repair mechanisms that are depleted in persistent pain states.
NeuroCoaching
Chronic pain rewires behavior, sleep, and cognition. Dr. Edwards works with patients on pain catastrophizing, sleep hygiene, activity pacing, and the cognitive patterns that reinforce central sensitization through fear-avoidance and hypervigilance.
Our Diagnostic Approach
Before we treat chronic pain, we identify the mechanism producing it. Each diagnostic tool answers a specific question about where the signal is being generated or amplified.
Advanced Neuroimaging
Functional MRI and PET scanning reveal pain-processing abnormalities that structural imaging misses. We assess cortical thickness in somatosensory and insular cortex, connectivity between the pain matrix and prefrontal regulatory regions, and metabolic activity in brainstem pain-modulation centers.
Quantitative Sensory Testing
QST maps thermal and mechanical detection and pain thresholds across dermatomes. Shifted thresholds and temporal summation patterns provide objective evidence of central sensitization and help distinguish neuropathic from nociceptive pain mechanisms in patients with ambiguous presentations.
Autonomic Testing
Sympathetic skin response, heart rate variability, and sudomotor testing evaluate the autonomic nervous system dysfunction that drives vasomotor and trophic changes in CRPS and that contributes to pain amplification through sympathetic-afferent coupling.
Inflammatory & Neuroinflammatory Panels
Blood panels measuring high-sensitivity CRP, IL-6, TNF-alpha, and neurofilament light chain identify systemic and neuroinflammatory contributions to the pain state. These markers guide anti-inflammatory components of the treatment protocol and provide objective measures for tracking response over time.
What to Expect
Pain history and functional assessment
Estimated time: 30 minutes
Dr. Orr takes a detailed history of your pain including location, character, duration, intensity, triggers, and how it affects sleep, mood, and daily function. He reviews prior treatments, imaging, and specialist evaluations.
Neurological examination
Estimated time: 20 minutes
A focused exam evaluates sensory function, motor strength, reflexes, and the distribution of pain to determine whether it follows a nerve root, peripheral nerve, or central pain pattern. Musculoskeletal examination identifies trigger points and myofascial contributions.
Diagnostic testing
Estimated time: 30 minutes
Dr. Orr may order nerve conduction studies, MRI of the relevant region, or laboratory testing to identify treatable causes. The workup is guided by the clinical pattern and what prior evaluations have or have not addressed.
Multimodal treatment plan
Estimated time: 20 minutes
Treatment options may include nerve blocks, trigger point injections, medication management, IV therapies, and referral for physical therapy. Dr. Orr builds the plan around the specific pain mechanism identified in your evaluation.
Ongoing pain management
Estimated time: 15 minutes
Chronic pain requires ongoing monitoring and treatment adjustment. Dr. Orr schedules follow-up visits to assess treatment response, adjust medications, repeat procedures as needed, and modify the plan based on your progress.
Frequently Asked Questions
How is a neurological approach to chronic pain different from a pain clinic?+
Most pain clinics focus on blocking pain signals with injections and managing medications. We start by investigating the neurological source of the pain, using brain imaging, sensory testing, and blood work to find out why your nervous system is generating or amplifying pain.
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Most pain clinics focus on interventional procedures and opioid management without investigating the neurological origin of the pain. Our evaluation starts with the nervous system. We use advanced neuroimaging, quantitative sensory testing, and autonomic studies to determine whether the pain is being driven by central sensitization, peripheral nerve dysfunction, neuroinflammation, or disrupted descending inhibition. The treatment plan follows from those findings rather than from a protocol applied uniformly to every patient.
What conditions do you treat under chronic pain?+
We evaluate complex regional pain syndrome, central sensitization syndromes, post-concussive pain, trigeminal and occipital neuralgia, neuropathic pain, and chronic pain that has not responded to standard treatments.
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We evaluate and treat complex regional pain syndrome (CRPS), central sensitization syndromes, persistent post-concussive pain, trigeminal and occipital neuralgia, neuropathic pain with neurological features, and chronic pain that has not responded to standard interventional or pharmacological management. If pain is being generated or amplified by the central nervous system rather than by ongoing tissue injury, it falls within our scope.
What diagnostic tests do you use for chronic pain evaluation?+
We use brain imaging to assess how pain is being processed, sensory testing to map changes in pain and temperature perception, autonomic testing, and blood panels for inflammation and neuroinflammatory markers.
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Our workup includes functional neuroimaging to assess cortical pain processing, quantitative sensory testing to map threshold changes in pain and temperature perception, autonomic testing to evaluate sympathetic nervous system function, and blood panels for inflammatory and neuroinflammatory markers. These tests identify where the pain signal is being generated or amplified, which determines which therapies will be effective.
Do you prescribe opioids for chronic pain?+
No. Our approach treats the neurological source of chronic pain rather than masking it with opioids. We use nerve blocks, neurocoaching, and targeted therapies that address the mechanisms maintaining the pain state.
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No. Our approach is designed to treat the neurological source of chronic pain, not to mask it pharmacologically. We use nerve blocks for specific peripheral generators, and neurocoaching to address the behavioral and cognitive dimensions of chronic pain. These therapies target the mechanisms that maintain the pain state rather than suppressing the signal at the receptor level.
How long does the chronic pain evaluation take?+
The initial evaluation runs three to five consecutive days through our Intensive Brain Health Program. Follow-up visits for ongoing therapy are scheduled based on your response and the complexity of your condition.
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The initial evaluation is delivered through our Intensive Brain Health Program over three to five consecutive days. Patients undergo diagnostic testing, a detailed review of findings with Dr. Orr, and begin their treatment protocol during that window. Follow-up visits for ongoing neuromodulation or infusion therapy are scheduled based on individual response and the complexity of the pain condition.
Does insurance cover neurological chronic pain treatment?+
No. We operate outside insurance networks. We provide superbills for potential out-of-network reimbursement, and our coordinator can discuss costs before you schedule.
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The Neurogenesis Project operates outside of insurance networks. Our diagnostic and treatment protocols use therapies that are not typically covered by commercial insurance or Medicare. We provide detailed superbills and medical documentation that patients can submit for potential out-of-network reimbursement. Our patient coordinator can discuss costs and documentation options before you schedule.
What is central sensitization and how do you test for it?+
Central sensitization is when your nervous system starts amplifying pain signals, producing pain from things that should not hurt. We test for it with sensory testing, clinical examination, brain wave mapping, and blood work measuring neuroinflammatory markers.
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Central sensitization is a state in which the central nervous system amplifies pain signals, producing pain responses to stimuli that should not be painful. It underlies conditions like fibromyalgia, chronic migraine, and certain post-surgical pain syndromes. We assess for it using quantitative sensory testing, clinical examination of allodynia and hyperalgesia, and a detailed pain history that maps how the pain has spread and changed. Lab work evaluating neuroinflammatory markers and neurotransmitter metabolites provides additional data about the biochemical environment sustaining the sensitized state.
What is the difference between a neurologist and a pain management specialist?+
Pain management specialists, usually trained in anesthesiology, focus on blocking pain with injections and medications. A neurologist investigates why the nervous system is generating or amplifying pain in the first place. We provide the diagnostic evaluation and coordinate with pain management when procedures are needed.
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Pain management specialists, who are typically trained in anesthesiology, focus on blocking pain signals through injections, nerve blocks, and pharmacologic management. A neurologist evaluates why the nervous system is generating or amplifying pain in the first place. Our approach starts with diagnosis: nerve conduction studies, brain imaging, metabolic panels, and inflammatory markers that identify the root cause. In practice, many chronic pain patients benefit from both. We provide the diagnostic evaluation and coordinate with pain management colleagues when procedural interventions are indicated.
Can chronic pain cause measurable changes in the brain?+
Yes. Multiple brain imaging studies have shown that chronic pain is associated with loss of gray matter in the prefrontal cortex, comparable to 10 to 20 years of aging. The encouraging news is that effective treatment has been shown to reverse some of these changes.
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Yes. Multiple neuroimaging studies have demonstrated that chronic pain is associated with gray matter volume loss in the prefrontal cortex, thalamus, and insula. A 2013 study in The Journal of Neuroscience showed that patients with chronic back pain had reduced prefrontal gray matter equivalent to 10 to 20 years of aging. The encouraging finding is that effective pain treatment has been shown to reverse some of these structural changes, which we can track with NeuroQuant volumetric analysis.
Chronic Pain Deserves a Neurological Workup
If you’ve been through pain clinics, opioid tapers, and injections that don’t hold—the problem may not be where anyone has been looking. Dr. Orr evaluates chronic pain as a disorder of the central nervous system and builds a treatment plan around what the diagnostics actually show. The Neurogenesis Project is accepting new patients in St. Marys, Georgia.