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)
- Tony, Las Vegas. Tony, you're right. We've done articles in the past on the Genie Girl in the DIRECTV Genie commercials and the comely brunette in the AT&T family spots. But now we will tackle your question of who's that 'hot chick' in the Nationwide commercials. And the answer is...Jana Kramer!