Speech Language Disorders Aphasia Aphasia, sometimes called dysphasia, is a complex acquired neurological disorder which is caused by damage to the portions of the brain that are responsible for language. Read more about Aphasia. Apraxia Apraxia is a general term used to describe a wide range of medical conditions that are characterized by an inability to perform complex movements. Read more about Apraxia. Dysarthria Dysarthria occurs when the part of the brain that controls speech production is damaged. When this happens, the muscles needed to make certain sounds may become weak or paralyzed. Read more about Dysarthria. Head and Neck Cancer The Division of Speech Pathology is part of the multi-disciplinary chemo-radiation team at Strong Memorial Hospital. We provide speech/voice and swallowing services to chemo-radiation patients. Read more about Services for Head and Neck Cancer Patients.