Botulinum toxin can spread to some distance of thirty–forty five mm through the injected muscles to your adjacent muscles, whether or not these muscles are separated by fasciae. Neck muscles are prone to diffusion of botulinum toxin, and paralysis of the incorrect muscles leads to dysphonia, dysphagia or dystonia. https://botulinumtoxins17384.bcbloggers.com/34742356/5-tips-about-botulinum-toxins-are-produced-by-you-can-use-today