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 is a fictional character appearing in more than 100 commercials for Progressive Insurance, beginning in 2008. Portrayed by actress and comedian Stephanie Courtney, the character has developed a fan base on social networks and has become an iconic advertising mascot.lo is a fictional character appearing in more than 100 commercials for Progressive Insurance, beginning in 2008. Portrayed by actress and comedian Stephanie Courtney, the character has developed a fan base on social networks and has become an iconic advertising mascot.