Which aphasia is non-fluent with good comprehension and reading, but impaired writing, with repetition preserved, associated with the left anterior frontal region?

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Nonfluent speech with preserved comprehension and reading, plus impaired writing and preserved repetition, points to transcortical motor aphasia. This pattern comes from damage to the left anterior frontal region, near the supplementary motor area, which disrupts spontaneous speech production but leaves the repetition circuit intact (the arcuate fasciculus) so you can still repeat what you hear. Because the posterior language areas involved in understanding and reading are spared, comprehension and reading remain good, while the motor planning needed for producing written language is affected, leading to writing difficulties. This combination distinguishes transcortical motor aphasia from other fluent or nonfluent aphasias where repetition is impaired.