Multidimensional Dysfunction in Chronic Nonspecific Low Back Pain: A Correlational Study of Key Clinical Measures

Area of Science:

• Rehabilitation Medicine
• Clinical Biomechanics
• Pain Management

Background:

• Chronic nonspecific low back pain (CNLBP) presents a growing global health challenge.
• Multidimensional impairments in CNLBP patients necessitate comprehensive assessment.
• Understanding these impairments is key to effective clinical intervention.

Purpose of the Study:

• To investigate multidimensional impairments in CNLBP patients.
• To analyze correlations among pain, muscle function, neuromuscular control, and psychological status.
• To provide a basis for individualized CNLBP assessment and treatment.

Main Methods:

• 56 CNLBP patients and 30 healthy controls were enrolled.
• Assessments included pain/function, muscle morphology, neuromuscular control, and sleep/psychological status.
• Comparative and correlational analyses were performed between groups and within the CNLBP cohort.

Main Results:

• CNLBP patients exhibited lower pressure pain threshold, reduced back extensor strength, and altered multifidus muscle morphology (e.g., smaller CSA, reduced thickness change rate).
• Impaired neuromuscular control (lower flexion-relaxation ratio - FRR) was observed in CNLBP patients.
• CNLBP patients reported poorer sleep quality and higher anxiety and depression scores, with significant correlations between FRR and pain/disability.

Conclusions:

• CNLBP is characterized by widespread impairments affecting pain perception, multifidus muscle function, neuromuscular regulation, and psychological well-being.
• The correlation between FRR and pain/disability scores is critical for tailoring rehabilitation programs.
• Further longitudinal research is warranted to validate these findings and refine treatment approaches.