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.
When healthy fingernails begin to change color or texture, one of the most common underlying causes is nail fungus, which can cause the nails to crack, peel, and change color and texture. Common disorders like thyroid disease can also cause abnormalities in the toenail and fingernail beds, often producing dry brittle nails that crack and split easily.