Common causes and how they affect speech
Difficulty speaking can arise from neurological events (stroke, transient ischemic attack, head injury), language disorders such as aphasia, and neurodegenerative diseases (for example Parkinson disease or multiple sclerosis). Motor control problems of the speech muscles cause dysarthria, while vocal fold or laryngeal disorders produce hoarseness and articulation issues. Hearing loss, developmental language delay in children, and psychogenic or psychiatric factors can also impair speech clarity.





