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)
I know her as Megan from the Progressive TV ad or the gal from the latest Milo's Dog Treats TV ad. Melamie is very recognized and memorable by her voice, however she was on Notes from the underbelly and I don't remember her from that! Also found that Melanie has worked with Yoplait and 1-800 Dentist.