Sensory aphasia is the result of a lesion of the posterior sensory language center (Wernicke’s area) in the superior temporal gyrus of the dominant hemisphere. Sensory aphasia is characterized by a patient who hears normally but cannot understand what he or she is being asked. Patients with sensory aphasia express themselves fluently, with a large amount of speech and normal articulation, but their speech is often disorganized and lacks meaningful sentences, which makes it difficult to understand and often results in answers that do not make sense. Patients with sensory aphasia have repetition deficits often consistent with auditory comprehension deficits, and patients with sensory aphasia also have varying degrees of naming and writing deficits. Sensory aphasia is commonly caused by diseases such as cerebral infarction and cerebral hemorrhage, which cause lesions in the posterior part of the superior temporal gyrus of the dominant hemisphere.