What are the types of aphasia?

Wikipedia knows. 400 characters won't answer this one - have you considered an online search? http://en.wikipedia.org/wiki/aphasia.
3 major classes. There are many types of aphasia that can be grouped into three major headings: there are the motor type, the most common being broca's aphasia, the receptive type, most commonly wernicke's aphasis. The third is the dissociative or disconnection syndromes. These occur when there is an apparent interruption of association areas to the cortical language areas.

Related Questions

Had stroke. What type of aphasia is this?

There are few. Expressive aphasia (broca's) inability to produce language; receptive aphasia - unable to speak meaningful words (some people can do both expressive and receptive aphasia); global aphasia - unable to communicate completely you would need to clarify with neurologist or speecn therapist about specific type of aphasia. Read more...

What type of aphasia affects the ability to take jokes figuratively?

Metaphor. Aphasia is defined by language properties: http://www.Tandfonline.Com/doi/abs/10.1080/10926488.2001.9678900. Understanding figurative terms is in psycholinguistics: http://www.Tandfonline.Com/doi/abs/10.1207/s15327868ms1101_1. Another way is to look at language versus linguistics: http://www.Nsf.Gov/news/special_reports/linguistics/intro.Jsp. Or define metaphor: http://www.Qualitative-research. Read more...
Metaphors. Or another approach is to study neurolinguistics to understand these frontiers: http://en.Wikipedia.Org/wiki/neurolinguistics. Read more...

What type of aphasia affects the stroke patient's ability to understand sarcasm, connotations, etc?

Usually R side. Whereas stroke in the left hemisphere can affect a patient's ability to speak or to understand the words of speech, strokes in the right hemisphere (especially temporal and parietal) can affect the ability to understand the non-word aspects of language, such as tone, sarcasm, innuendo. Read more...