Memory loss is usually the most common symptom of dementia but in some cases, patients lose their ability to speak first. Speech difficulty, known as aphasia, can range from simply forgetting a word to the complete loss of ability to speak.
Scientists at Northwestern Medicine have pinpointed the location of of the brain networks that can lead to primary progressive aphasia (PPA), which is a form of dementia where an individual loses speech and language abilities rather than memory. PPA occurs when nerve cells in language-related parts of the brain malfunction.
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