Results show that participants with severe, untreated sleep apnea had a significant reduction in white matter fiber integrity in multiple brain areas. This brain damage was accompanied by impairments to cognition, mood and daytime alertness.
An iron deficiency can cause the nail bed to be thin and concave and have raised ridges. While most of Fox's patients don't come in to report nail problems, he routinely checks patients to make sure they have healthy fingernails. The nails offer many little clues to what's going on inside you.
Iron deficiency (Anemia) Anemia or iron deficiency may also be an underlying cause of cracked nails. Iron helps the body in producing hemoglobin, the oxygen carrying part of RBCs. A deficiency of iron can lead to cracked nails for the blood oxygen does not completely reach the nail bed.