When Amar returned to the doctor, the doctor indicated that…

When Amar returned to the doctor, the doctor indicated that there was no cure for the dystonia, but that injections of Botox in the area of the contracted muscle would relieve the symptoms. Botox is derived from botulinum neurotoxin, a toxin that binds to neurons and prevents them from releasing neurotransmitters. In high doses this can be deadly, but when carefully administered it is therapeutic. Why would the careful dosage of Botox relieve Amar’s symptoms