<unk>  (or<unk> emia) is a loss of the ability to produce and/or comprehend language, due to injury to brain areas specialized for these functions. It is not a result of deficits in sensory, intellect, or psychiatric functioning.  It is also not due to muscle weakness or a cognitive disorder.
Depending on the area and extent of the damage, someone suffering from<unk>  may be able to speak but not write, or vice versa, or display any of a wide variety of other deficiencies in language comprehension and production, such as being able to sing but not speak.<unk>  may co-occur with speech disorders such as dysarthria or apraxia of speech, which also result from brain damage.
Aphasia
Color blindness
Cortical blindness
Amblyopia
Cerebral atrophy
Lipodystrophy
Buphthalmos
Anosmia