This document discusses medical terminology related to muscle coordination, speech, and language. It explains that the suffix -taxia refers to muscle coordination which is controlled by the cerebellum in the brain. The suffix -phasia refers to speech which is initiated in the left frontal lobe of the cerebrum called Broca's area. Specific terms like ataxia, dysphasia, and aphasia are defined as referring to lack of muscle coordination, difficulty with speech, and inability to communicate verbally or in writing respectively.