Spasmodic dysphonia can also be misdiagnosed as voice tremor. Initial symptoms of spasmodic torticollis are usually mild. Adductor spasmodic dysphonia is the most common type. Vocal tremor may also be seen in spasmodic dysphonia. Symptoms also vary across types of spasmodic dysphonia. An increase in neurotransmitters causes spasms to occur in the neck, resulting in spasmodic torticollis. Kennedy suffers from spasmodic dysphonia, which causes his voice to quaver and makes speech difficult. Because spasmodic dysphonia shares many characteristics with other voice disorders, misdiagnosis frequently occurs. Linda was diagnosed with spasmodic dysphonia, preventing her from singing. Sensory tricks offer only temporary and often partial relief of spasmodic torticollis. Mixed spasmodic dysphonia is the most rare type. The most common treatment for spasmodic torticollis is the use of botulinum toxin type A. This type of spasmodic torticollis is usually inherited. A mix and variance of these symptoms are found in mixed spasmodic dysphonia. The pathophysiology of spasmodic torticollis is still relatively unknown.