The five diseases behind language impairment
An extensive autopsy study identifies diseases that cause progressive impairments of language, such as difficulty with grammar or word comprehension.
A new study from Northwestern University (IL, USA) reports that progressive language impairment – a form of dementia known as primary progressive aphasia (PPA) – is caused by five different diseases. Each of the diseases attacks a different area of the brain’s language center in the left hemisphere of the brain, thus each causing a different type of language impairment.
