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Coincidentally, and with a simultaneous positive cosmetic result, paralysis of the brow depressors leaves the brow elevator muscles unopposed. In so doing, a minor brow lift is obtained in many patients. As the eyebrows are elevated by the vertical-running frontalis muscle, the lack of any down pull by the depressors allows this muscle to raise the eyebrows to some degree. Multiple clinical studies have shown that modest brow elevation occurs in the range of 1 to 3mms. This may sound like a modest amount, but in the face this can be a make a real observable difference. Brow elevation with Botox can be done for the inner brow, outer brow, or both. It all depends on where one places the injections. As the most common area for Botox injections is in the glabellar area, only an inner brow lift will result. To create a more complete eyebrow lift, the outer brow depressors must be paralyzed as well. This means injecting out on the side of the brow to weaken the downward pull of the orbicularis oculi muscle. Injecting both inner and outer brows can create a 'chemical' brow lift which appears within seven days after the injections. You can see that an artistic eye in conjunction with the patient's input, is key in getting a result that the patient sees as both desireable and pleasing.
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