Nonfluent aphasia, in which a patient has good language comprehension but disrupted speech production, is typically associated with damage to:

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Nonfluent aphasia is typically associated with damage to Broca's area, which is located in the frontal lobe of the dominant hemisphere of the brain and is responsible for speech production. Patients with nonfluent aphasia may struggle to produce language, but they can often still understand it. Damage to other areas of the brain, such as Wernicke's area, may result in fluent aphasia, in which patients can produce speech but have difficulty with language comprehension. The corpus callosum and the sensory motor area are not directly involved in language production or comprehension.

Nonfluent Aphasia, in Which a Patient Has Good Language Comprehension