Aphasia Doesn't Mean Someone Has Lost Their Intelligence

Of everything that gets misunderstood about aphasia, the most consequential misconception might be the simplest one: that it reflects a loss of intelligence. It doesn’t. A clear, practically-minded explainer from Megan S. Sutton, MS, CCC-SLP, co-founder of Tactus Therapy, is built almost entirely around correcting that assumption and replacing it with something more useful: a real understanding of what’s actually impaired, and what isn’t.

Aphasia is a language disorder resulting from brain damage, most often from stroke, though head injury, brain tumors, and neurological disease can cause it too. It typically affects the brain’s left hemisphere, and depending on which specific area is involved, it can touch speaking, understanding spoken language, reading, writing, or gesture, in any combination. The guide is careful to draw a line between aphasia and other conditions it’s frequently confused with: dysarthria (a motor speech impairment affecting clarity), apraxia (difficulty planning the physical movements for speech), and cognitive-communication impairments, which stem from attention or memory deficits rather than language itself. These distinctions aren’t pedantic. They change what kind of therapy will actually help.

The three main types described, fluent (Wernicke’s) aphasia, where speech flows easily but often doesn’t make sense and comprehension is impaired; non-fluent (Broca’s) aphasia, where understanding is relatively preserved but producing speech is effortful and halting; and global aphasia, where both expression and comprehension are severely affected, give families and care partners a useful vocabulary for what they’re actually observing, rather than lumping every presentation together as “the stroke affected their speech.”

Where this piece is most immediately useful, though, is in its very concrete guidance for the people talking to someone with aphasia every day. Limiting a conversation to one person at a time, establishing the topic clearly before diving in, speaking at a natural (not exaggeratedly slow) pace, summarizing back what you think you understood, sticking to familiar subjects, actively encouraging any attempt at communication rather than jumping in to finish sentences, and simply allowing more time before expecting a response: these are small adjustments, but they compound. A family member who does even half of these consistently changes the day-to-day experience of living with aphasia, for both people in the conversation.

With over two million Americans living with aphasia, and speech-language therapy shown to meaningfully improve outcomes, the practical message here is worth repeating: the person is still in there. The communication just needs a different path.