Myelinated nerve fibers occur predominantly in the cranial and spinal nerves and compose the white matter of the brain and spinal cord. It is the myelin sheath that gives the whitish color to the areas of white matter. Unmyelinated fibers are abundant in the autonomic nervous system. Patient discussion about myelin
The actress in the Progressive Insurance commercial is Stephanie Courtney. Her commercial name is Flo. Other roles in which Stephanie Courtney has appeared: Mad Men (Marge, a secretary) Blades of Glory (reporter) The Brothers Solomon (Sara)
Flo From Progressive Photo: The Actress In Real Life. 150. When I think of iconic TV commercial characters, three come to mind: The GEICO Gecko, the Orbit Gum Girl and Flo from Progressive. Flo in particular is cool because unlike the ever-in-pink T-Mobile girl or always-beaming Orbit girl, she doesn't seem to be there just for decoration.