Speech-Language Pathologists (SLPs) assess, diagnose, treat and help to prevent speech, language, and communication disorders. Speech and language problems can result from a variety of problems including hearing loss, brain injury or deterioration, cerebral palsy, stroke, cleft palate, voice pathology, mental retardation, or emotional problems. These problems can be congenital, developmental or acquired. SLPs use written and oral tests, as well as specialized instruments, to diagnose the nature and extent of impairment and to record and analyze speech, language, and swallowing irregularities.
Speech disorders are problems of expression characterized by difficulty with forming speech sounds or producing voice. Language disorders are characterized by difficulty in comprehension and expression. Causes of speech and language disorders include environmental–behavioral influences, neurological diseases and injuries, viral infections, neuromuscular diseases, stroke, head injury, and genetic deviations.