Aphasia ( from Greek, aphatos : 'speechless' ), is also known as aphemia, an is a loss of the ability to produce and/or comprehend language, due to injury to brain areas specialized for these functions, Broca's area, which governs language production, or Wernicke's area, which governs the interpretation of language. It is not a result of deficits in sensory, intellect, or psychiatric functioning, nor due to muscle weakness or a cognitive disorder.