Nursing care
Expressive vs receptive aphasia: comprehension is the dividing line
Written and reviewed by Kevin Patel, MSN, RN, CCRN · 4 min read · Updated November 2026
Short answer
In expressive (Broca) aphasia the person understands fairly well but speaks in short, effortful phrases and knows the words are not coming out right. In receptive (Wernicke) aphasia speech flows easily but makes little sense, comprehension is poor, and the person is often unaware of the errors. Comprehension and self-awareness are the dividing line.
The best discriminating findings: comprehension and awareness
Ask whether the patient understands and whether they know something is wrong. NIDCD describes Broca aphasia as short phrases produced with great effort, often missing small words, with comprehension relatively preserved and frustration at the errors. MSD Manuals sums it up as nonfluent speech with good comprehension.
Wernicke aphasia looks almost opposite. Sentences are long and fluent but can be meaningless or contain made-up words, and understanding of spoken and written language is poor. MSD Manuals notes these patients are typically unaware that others cannot understand them. That lack of awareness is what makes receptive aphasia a safety issue.
Where the damage is and what comes with it
Both types usually follow damage to the language-dominant hemisphere, which MSD Manuals places on the left in right-handed people and in about two-thirds of left-handed people. Stroke is the most common cause tested. Broca aphasia comes from the frontal lobe; Wernicke aphasia from the temporal lobe.
The neighboring damage gives extra clues. MSD Manuals notes that right-sided weakness may accompany Broca aphasia, because the frontal motor area sits close by, while a right visual field cut commonly accompanies Wernicke aphasia. Global aphasia, from extensive damage to both areas, affects speaking, understanding, reading and writing together.
Findings that cannot settle the question
Both types can impair repetition, naming, reading and writing to some degree, so a single bedside question rarely decides it. MSD Manuals recommends assessing spontaneous speech, naming, repetition, comprehension, reading and writing. Slurred speech from weak mouth muscles is dysarthria, a motor problem, not aphasia, and the two can coexist after stroke.
Do not judge comprehension by nodding or yes answers. A patient with receptive aphasia may smile and agree while understanding little, and a patient with expressive aphasia may understand everything but fail to answer. Use simple one-step commands such as close your eyes, without gestures, to test understanding more fairly.
How the nurse communicates with each
For expressive aphasia, give the person time, ask yes-or-no questions, offer a picture board or writing if the dominant hand works, and avoid finishing sentences unless invited. NIDCD advises allowing plenty of time to talk and not correcting speech. Acknowledge the frustration directly; these patients know exactly what they want to say.
For receptive aphasia, speak in short, simple sentences, cut background noise, and support words with gestures, pictures and demonstration. Check understanding of safety teaching by watching the patient do the task, such as using the call light, rather than asking if they understood. Speak at a normal volume; aphasia is not a hearing problem.
Hypothetical practice scenario
Hypothetical scenario, not a real exam item: two days after a left-sided stroke, a client speaks in long, easy sentences that do not make sense and seems unbothered when the nurse looks puzzled. The nurse needs to teach call light use. Which approach is best: explain verbally and ask if the client understands, demonstrate the call light and have the client show it back, or give written instructions?
Demonstration with return demonstration is best, because this client fits receptive aphasia with poor comprehension of spoken and written language. Asking whether the client understands is the tempting distractor: it feels respectful, but the client may say yes without understanding. Written instructions fail for the same reason, since reading is also affected.
Sources and further reading
NIDCD: Aphasia. Broca and Wernicke aphasia characteristics, frontal and temporal lobe damage, awareness of errors, global aphasia, communication tips such as short sentences, extra time and not correcting speech.
MSD Manual Professional Version: Aphasia. Language-dominant hemisphere, fluency, comprehension and repetition in each type, unawareness in Wernicke aphasia, right hemiparesis and right visual field cut, bedside testing domains.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our neurological practice questions are the closest set to what this page covers.
Common questions
Which brain area causes expressive aphasia?
Damage to Broca area in the frontal lobe of the language-dominant hemisphere, usually the left. Stroke is the most common cause. Because the motor cortex is nearby, right-sided weakness may come with it.
How should a nurse communicate with receptive aphasia?
Use short, simple sentences, reduce distractions, and pair words with gestures, pictures and demonstration. Check understanding by having the person show the task rather than asking if they understood, since they may not notice their own misunderstanding.
Is Broca's aphasia expressive?
Yes. Broca aphasia is also called expressive or nonfluent aphasia. Speech is slow and effortful with short phrases, while understanding is relatively preserved. Wernicke aphasia is the receptive, fluent type.