Botulinum toxin can distribute into a distance of 30–45 mm through the injected muscles to your adjacent muscles, whether or not these muscles are separated by fasciae. Neck muscles are at risk of diffusion of botulinum toxin, and paralysis of the incorrect muscles contributes to dysphonia, dysphagia or dystonia. https://landenzjpxf.mycoolwiki.com/7928471/helping_the_others_realize_the_advantages_of_toxins_botox