Misperception of Visual Verticality Measured with a Virtual Reality Device in Patients with Fibromyalgia Syndrome: A Cross-Sectional Study

The objective of this study was to analyze the perception visual verticality (VV) in subjects with Fibromyalgia Syndrome (FMS) and correlate symptoms disease balance capacity. A cross-sectional including 54 patients (51 female) conducted. evaluation carried out a virtual reality device by calculating Mean Absolute Error (MAE) degrees deviation two tests: Subjective Visual Vertical (SVV) test for contribution vestibular system Rod Frame (RFT) system. In total, 16 (29.6%) presented good VV perception, 6 (11.1%) an exclusive alteration SVV test, 19 (35.2%) RFT 13 (24.1%) showed tests. MAE medium correlations several variables such as Impact Questionnaire (FIQ) (Rho = 0.399, p 0.003), Pain Catastrophizing Scale (PCS) 0.417, 0.002), Dizziness Handicap Inventory (DHI) 0.376, 0.005), Activities-Specific Balance Confidence (ABC-16) −0.367, 0.006). Instability Support Reduced 0.327, 0.016) Gait Eyes Open 0.312, 0.022) subscales JAEN (Joined Assessment Equilibrium Neuro-motor) Scale. Conclusions: Around 70% FMS some VV; 60% these dependence. correlates impact health status FMS, dynamic balance.