Language disorders refer to impairments in the application of spoken and written language in context; while speech disorders refer to difficulties in speech articulation, including difficulties in voice production, changes in the rhythm and rhyme of speech, and abnormalities such as obstructed or interrupted airflow. This means that patients with language disorders may not have brain or muscle abnormalities, but simply have problems in organizing language, while speech disorders are affected by their own physiology and disease, and have problems in the production, processing, and feedback stages of language, and have vocal abnormalities.