Is it possible to atrophy muscles through use of Botox injections?

Botox can be injected into these areas to create a softer look. The botox will essentially relax the muscles creating the appearance of atrophic muscles. The results will last up to 3-4 months hence you will have to re-inject roughly 3x per year. When administered by an expert injector you shouldn't have an issue with too much laxity. The biggest issue will be muscle . weakness if you inject too large doses, which will be required in larger muscles (as . compared to cosmetic forehead/face injections) See an expert. Best, Dr. Emer. 

Botox atrophys muscles, so yes. If I may ask a question I do not understand why you would want to target muscles you need and use with Botox. Are you experiencing muscle spasms or have a condition, such as tics, that needs those muscles to relax?

Botox will definitely allow you to shrink the targeted muscles. It is unlikely you will be able to inject all muscles at once as it will be higher than the approved amounts. There is also concern that a large one-time injection of Botox will increase your chances of developing antibodies to Botox which will cause future injections to be less effective. It is best to visit an expert injector to determine which areas should be targeted and in what order to achieve your goals. Hope this helps!Johnson C. Lee, MD
Board-Certified Plastic Surgeon
IG: @drjohnsonlee