What is wernicke's aphasia?

Wernike Aphasia: Speech is fluent but often degenerates into random hard to follow "streams of consciousness, which may be peppered with non-words or made up words. The speech also fails to provide good answers to questions posed to them, suggesting that they do not understand what is said to them. Hence there is difficulty in comprehension rather than articulation, hence the term Receptive Aphasia.