In spine surgery and neurosurgery, clinical decision-making has long been anchored to structural imaging. The identification of disc degeneration, Modic changes, or foraminal stenosis on magnetic resonance imaging (MRI) has often been interpreted as sufficient—and sometimes solitary—justification for intervention. Yet experienced clinicians recognize that the relationship between radiographic burden and a patient’s lived functional capacity is, at best, inconsistent. What has been missing, however, is a clinically actionable framework to redefine “normality” in the context of chronic spinal degeneration.
Teraguchi et al. [
1] address this gap through the Wakayama Spine Study, a rigorously conducted population-based cohort embedded within the ROAD (Research on Osteoarthritis/Osteoporosis Against Disability) study [
2]. Over the past decade, this group has provided some of the most comprehensive epidemiological insights into spinal degeneration—spanning the prevalence and distribution of disc degeneration across the entire spine [
3], the clinical correlates of lumbar spinal stenosis [
4], and the longitudinal progression of degenerative phenotypes [
5]—demonstrating that imaging abnormalities are nearly ubiquitous with aging and only weakly associated with symptoms. The present study represents a critical conceptual advance: rather than asking what degeneration looks like, it asks what it actually means for patients’ daily function.
The central contribution of this work is the operationalization and epidemiological validation of “functional resilience” as a clinically meaningful phenotype [
1]. More importantly, it challenges the long-standing assumption that structural abnormalities define disease severity, proposing instead that preserved function should be considered the primary anchor of clinical relevance. Among 347 community-dwelling individuals with chronic low back pain (LBP), 63% maintained minimal disability (Oswestry Disability Index ≤20%) despite the near-universal presence of degenerative MRI findings, including disc degeneration in over 95% of cases. In multivariable models adjusted for age, no conventional MRI feature independently predicted functional status. In contrast, male sex, absence of obesity, and superior physical performance—reflected by grip strength and gait speed—were significantly associated with maintained function.
These findings extend and deepen a well-established body of literature demonstrating the limited clinical specificity of spinal imaging. The seminal work by Brinjikji et al. [
6] showed that degenerative changes are highly prevalent even in asymptomatic individuals, increasing with age to near universality in older populations. The Wakayama Spine Study moves beyond this observation by demonstrating that even among symptomatic individuals, structural abnormalities fail to discriminate between those who are functionally impaired and those who are not. This distinction is crucial. It suggests that the traditional imaging-centered paradigm does not merely lack sensitivity—it may be fundamentally misaligned with clinically meaningful outcomes.
The implications for surgical decision-making are substantial. In aging populations where so-called “abnormal” MRI findings represent the norm rather than the exception, reliance on structural imaging as the primary determinant of intervention thresholds becomes increasingly difficult to justify. These results call into question whether current imaging-driven surgical indications remain defensible and underscore the need to re-anchor clinical decision-making in function rather than morphology.
Equally important is the identification of obesity as a modifiable predictor of impaired function. This finding reinforces the concept that LBP-related disability is not solely a biomechanical problem but a systemic condition influenced by metabolic and inflammatory factors. Adipose-derived cytokines, microvascular dysfunction, and sarcopenia may collectively diminish the physiological reserve necessary to maintain daily activities in the presence of structural degeneration [
7,
8]. From a clinical perspective, this supports a shift toward multimodal management strategies, including weight optimization, structured exercise, and functional rehabilitation [
9]. Preoperative optimization of these factors may be as important as the surgical procedure itself in determining real-world outcomes.
The use of simple performance-based measures—grip strength and gait speed—deserves particular emphasis. These tools are inexpensive, reproducible, and directly reflect functional capacity in daily life. Their superior discriminatory value compared to MRI phenotypes aligns with a growing body of surgical literature demonstrating that baseline physical performance predicts postoperative complications, length of stay, and recovery trajectories across multiple specialties [
10]. Incorporating such measures into routine spine practice would represent a meaningful step toward patient-centered evaluation.
Several limitations warrant consideration. The cross-sectional design precludes causal inference, and the inherent healthy volunteer bias of community-based cohorts may underestimate the true burden of disability. MRI assessments were necessarily simplified and may not fully capture cumulative or level-specific degenerative severity. Furthermore, the absence of psychosocial variables—such as pain catastrophizing, fear-avoidance, and self-efficacy—likely underestimates the multidimensional nature of functional resilience, given their well-established role in chronic pain.
Despite these limitations, this study provides a compelling framework for redefining normality in LBP. The conventional benchmark—complete symptom resolution and structurally “normal” imaging—is an idealized standard that most aging patients cannot achieve. In contrast, the concept of functional resilience offers a pragmatic and clinically meaningful alternative: the preservation of activities of daily living despite persistent symptoms and structural change.
For spine surgeons and physicians, the message is clear. The future of spine care may not lie in correcting images, but in preserving the capacity to live well despite them.
NOTES
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Conflict of Interest
The author has nothing to disclose.
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