What Causes Hypophonia

Laryngitis is the most common cause of decreased voice volume, but laryngeal hypophonia may result from other causes, such as damage to the superior laryngeal nerve, nodules or polyps of the larynx or vocal cords, or carcinoma involving the larynx.

What causes akinesia?

Akinesia in PD can happen as a result of a lack of dopamine. Your brain produces dopamine and passes it along into your body by neurons. Levodopa helps treat akinesia and other PD symptoms because your brain turns it into dopamine.

What can cause dysphonia?

• Vocal cord nodules: Small calluses on the vocal cords from overuse of the voice or vocal cord injury that occurs with yelling.
• Vocal cord polyps: Small growth on the vocal cord that is like a blister from overuse of the voice or vocal cord injury during yelling.