Dysphonia, dysarthria, dysphasia and dysphagia - what are they and why are they different?

These four words are very similar and refer to disorders in the same region but are different in important ways. What are they and what is the relevant anatomy here? Larynx anatomy:    • Larynx anatomy   Swallowing anatomy:    • Swallowing anatomy (pharynx)   Oral cavity anatomy:    • Oral cavity anatomy   Broca's area:    • Broca's area (neuroanatomy)   Music: Twin Peaks by Gregory David https://www.epidemicsound.com/track/U...