The updated guideline covers four neurologic disorders: spasticity in adults, which is muscle tightness that interferes with movement typically following a stroke, spinal cord or other neurologic injury; cervical
dystonia, a disorder of the brain affecting
neck muscle control that causes involuntary head tilt or
neck movement; blepharospasm, a movement disorder that causes the eyes to close uncontrollably; and chronic and episodic migraine.
«In many cases, after an injection for a disabling spasm of
neck muscles called cervical
dystonia, there is no change in muscle tone but the patient finds relief and is perfectly happy.