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)
About Progressive TV Commercial, 'Discount Boy Band'. Dressed in all white, a boy band that is reminiscent of the 90s performs on stage while Flo takes on the role of band manager. Progressive introduces The Dizzcounts, featuring NSYNC member Joey Fatone. The rest of the band members have names that resemble an auto insurance policy, like Safe-Driver and Multi-Car.