Botulinum toxin can spread to your length of thirty–forty five mm from the injected muscles for the adjacent muscles, regardless of whether these muscles are separated by fasciae. Neck muscles are at risk of diffusion of botulinum toxin, and paralysis of the wrong muscles results in dysphonia, dysphagia or https://damiennfcob.wikimillions.com/4022229/everything_about_botulinum_toxins_in_humans