Final answer:
Fluent aphasias include conditions where speech production maintains normal fluency. Anomic and Wernicke's aphasias are fluent types, characterized by issues with word retrieval and language comprehension, respectively.
Step-by-step explanation:
The fluent aphasias are characterized by speech that maintains normal fluency and rate, but may be impaired in other ways, such as in comprehensibility or in the correct use of words. Based on this definition, the types of fluent aphasias are anomic and Wernicke's aphasia. Anomic aphasia is marked by difficulty in finding the right words, particularly nouns and verbs. Wernicke's aphasia involves difficulty in understanding spoken words and in producing meaningful language, despite the speech being fluent.
On the other hand, global aphasia is characterized by severe communication difficulties in both speech production and comprehension, making it non-fluent. Lastly, conduction aphasia is a rare condition that involves the loss of the ability to conduct between listening and speaking, generally preserving the patient's ability to understand and to speak with good fluency, but it may involve a marked inability to repeat words or phrases. Therefore, conduction aphasia is also considered a fluent aphasia.