Aphasia is the loss of language as a result of a neurological disorder. This could mean difficulty with receptive language and/or expressive language. Communication can be affected in any area: auditory, verbal, written language, reading comprehension, as well as higher level language functioning, such as problem solving, reasoning skills, and critical thinking.
Dysarthria is a neurological disorder involving the speech musculature, causing muscle weakness, and/or discoordination. Dysarthria results in difficulties in speech production involving speech, breath support for speaking, vocal quality, pitch, and loudness. Difficulties with speed, coordination, and accuracy of speech muscle movements involved in speaking are observed with dysarthric patients.
Dysphagia is a swallowing problem resulting from a neurological disorder.