• Mogos – difficulty ; phonos – speech
• It refers to the phonic spasm in professional voice users when they are in public.
• The etiology is psychogenic.
• Scenario :  Consider a professional singer who gets onto stage for a concert. He sings for some time but suddenly could not speak as his vocal cords adduct. 
• Treatment :
  • Vocal rest
  • Psychotheray
  • Speech rest.