Aphasia Home A-Z Health Information Health Library A-Z Aphasia Overview Aphasia and dysphasia are language function disorders, whereas dysarthria is disorder of articulation, which is abnormal motor production of speech. Aphasia may be associated with various neurological conditions affecting the brain cortex such as stroke, demyelination, and dementia. Causes Aphasia occurs due to damage in the part of the brain responsible for language comprehension and expression. Symptoms Spontaneous speech disturbance such as difficulty in articulation, fluency, grammar, word substitution, and loss of intonationDifficulty in remembering the names of objects or peopleInability to comprehend words or instructions or conceptsInability to repeat words or phrasesDifficulty in reading and writing Risk factors Learning disabilities such as dyslexiaRare gene changes Specialist to approach Neurologist Diagnosis Clinical examinationMRI brain to detect the underlying cause of aphasia or dysphasia Treatment Treatment of underlying disorderSpeech therapy to improve comprehension and verbal output