This document defines medical terms related to paralysis and speech. It explains that paraplegia is paralysis of the lower half of the body, hemiplegia is paralysis of one side of the body, and quadriplegia is paralysis of all four limbs. It also defines types of aphasia, including Wernicke's aphasia which is a lack of receptive speech and Broca's aphasia which is a lack of expressive speech. Dysphasia refers to difficult speech.