Which muscles should be concentrated on with microcurrent to reduce the appearance of "11's"?

To effectively reduce the appearance of "11's," which are the vertical lines that form between the eyebrows due to the action of frowning or squinting, the focus should be on specific facial muscles involved in these expressions. The procerus muscle, which lies over the bridge of the nose, helps pull the skin down between the eyebrows when frowning. The corrugator muscle, located at the inner end of the eyebrows, is activated when furrowing the brows, contributing significantly to the formation of these lines.

By applying microcurrent to these muscles, the treatment can facilitate muscle relaxation and toning, potentially leading to a reduction in the depth of the "11's" as the muscles are strengthened or re-educated to lessen their pull on the skin. Through this method, the signs of aging in this area can be diminished, making option B the appropriate choice for addressing the appearance of "11's."