Depending on which language properties are more or less affected, aphasia can present in several forms.
Fluent aphasia (sensory or receptive — Wernicke’s aphasia) is characterized by significant comprehension difficulties and relatively fluent verbal output that is phonetically normal but severely semantically impaired, making it incomprehensible to the listener. Typically, individuals with this type of aphasia do not understand what others are saying and often do not realize that others cannot understand what they are trying to communicate.
Non-fluent aphasia (motor or expressive — Broca’s aphasia). People with this type of aphasia have difficulty finding words and speak in very short sentences. They understand what others say and are often aware of their communication challenges, which can sometimes lead to intense frustration.
Global aphasia. This is the most severe form of aphasia. Individuals with this condition have problems both expressing and understanding language. They lose the ability to understand and express themselves, whether in writing, reading, or speaking.
Special types of aphasia: crossed aphasia, foreign accent syndrome, adynamic aphasia.