Wernickes aphasia, also known as receptive aphasia, sensory aphasia or posterior aphasia, is a type of aphasia in which individuals have difficulty understanding written and spoken language. Patients with Wernickes aphasia demonstrate fluent speech, which is characterized by typical speech rate, intact syntactic abilities and effortless speech output. Writing often reflects speech in that it tends to lack content or meaning. In most cases, motor deficits (i.e. hemiparesis) do not occur in individuals with Wernickes aphasia. Therefore, they may produce a large amount of speech without much meaning. Individuals with Wernickes aphasia are typically unaware of their errors in speech and do not realize their speech may lack meaning. They typically remain unaware of even their most profound language deficits. Like many acquired language disorders, Wernickes aphasia can be experienced in many different ways and to many different degrees. Patients diagnosed with Wernickes aphasia can show severe language comprehension deficits; however, this is dependent on the severity and extent of the lesion. Severity levels may range from being unable to understand even the simplest spoken and/or written information to missing minor details of a conversation. Many diagnosed with Wernickes aphasia have difficulty with repetition in words and sentences and/or working memory.Wernickes aphasia was named after German physician Carl Wernicke, who is credited with discovering the area of the brain responsible for language comprehension (Wernickes area). Signs and symptoms
The following are common symptoms seen in patients with Wernickes aphasia:

Impaired comprehension: deficits in understanding (receptive) written and spoken language.
This is because Wernickes area is responsible for assigning meaning to the language that is heard, so if it is damaged, the brain cannot comprehend the information that is being received. Poor word retrieval: ability to retrieve target words is impaired. This is also referred to as anomia. Fluent speech: individuals with Wernickes aphasia do not have difficulty with producing connected speech that flows. Although the connection of the words may be appropriate, the words they are using may not belong together or make sense (see Production of jargon below). Production of jargon: speech that lacks content, consists of typical intonation, and is structurally intact. Jargon can consist of a string of neologisms, as well as a combination of real words that do not make sense together in context. The jargon may include word salads. Awareness: Individuals with Wernickes aphasia are often not aware of their incorrect productions, which would further explain why they do not correct themselves when they produce jargon, paraphasias, or neologisms. Paraphasias:Phonemic (literal) paraphasias: involves the substitution, addition, or rearrangement of sounds so that an error can be defined as sounding like the target word. Often, half of the word is still intact which allows for easy comparison to the appropriate, original word. E.g. "bap" for "map"
Semantic (verbal) paraphasias: saying a word that is related to the target word in meaning or category; frequently observed in Wernickes aphasia. E.g. "jet" for "airplane" or "knife" for "fork"
Neologisms: nonwords that have no relation to the target word.E.g.