A neuron can cause a domino effect

If the sense of smell disappears, this can indicate a disease such as Alzheimer’s or Parkinson’s disease. However, unlike previously assumed, general degenerations in the nervous system do not play a leading role in the loss of the sense of smell with increasing age, but individual nerve cells or classes of nerves are decisive. (Mehr in: Pressemitteilungen – idw – Informationsdienst Wissenschaft)