Clinical research has been able to show a correlation between sleep abnormalities and inner ear
abnormalities. This correlation is related to a lack of Stage IV sleep, commonly known as “deep
sleep”. During Stage IV sleep the body produces a hormone called IGF-1 (Somatomedin-C). This
hormone is required for proper transport of proteins, essential fatty acids and other nutrients into cells
during their repair. A short-term deficiency of this hormone usually causes only one symptom;
fatigue. If this deficiency persists, then patients are routinely labeled with chronic fatigue and may
develop deficiencies of bone density, reduction in muscle strength, exercise intolerance, emotional
lability, increased body fat and higher lipid and cholesteol concentrations in the blood. Fatigue is
almost a universal complaint of all patients with nervous system abnormalities.