Many different populations can and do suffer from<unk> . For instance, deaf patients who have suffered a stroke can demonstrate semantic and phonological errors, much like hearing<unk>  patients. Researchers have called this subtype sign<unk> . Multilingual patients typically experience<unk>  to a greater degree in just one of their fluent languages. However, evidence conflicts as to which language – first or second – suffers more. Research on children with<unk>  has indicated that children who undergo treatment are, for the most part, able to gain back normal language abilities, aided by brain plasticity. However, longitudinal research on children with<unk>  due to head injury shows that even several years after the injury, some signs of deficient word retrieval are still observed. These remaining symptoms can sometimes cause academic difficulties later on.
Anomic aphasia
Global aphasia
Receptive aphasia
Expressive aphasia
Jargon aphasia
Visuospatial dysgnosia
Integrative agnosia
Progressive nonfluent aphasia