Answer to Question 1
Answer: Broca's aphasia entails difficulty in speech articulation, word choice (anomia), and using grammar. A person suffering from Broca's aphasia is better able to comprehend speech than to produce speech. In contrast, Wernicke's aphasia is characterized by fluent speech that is meaningless, and this form of aphasiaunlike Broca'sis characterized by poor speech comprehension. Moreover, a person with Wernicke's aphasia seems unaware of his or her speech deficits. Broca's aphasia is produced by damage to tissue in and around Broca's area, whereas Wernicke's is produced by damage to the superior temporal lobe of the left hemisphere.
Answer to Question 2
Answer: Pure word deafness (PWD) is a syndrome produced by damage to the left temporal lobe in which a person can hear but is unable to recognize/understand the words that are heard. A PWD patient can read and write and is able to recognize the emotional content of speech even if he or she cannot understand the meaning of the words. Damage to the posterior language area only produces poor speech comprehension and poor speech production. Damage to Wernicke's area and to the posterior language area produces an aphasia syndrome that includes poor speech comprehension, poor repetition, and the production of fluent but meaningless speech. In short, Wernicke's syndrome is a combination of the two syndromes.
Symptoms of anaphylaxis.
Kidney Disease symptoms and prevention
Assessment of Aphasia
Symptoms That May Lead to a Diagnosis of Attention Deficit/Hyperactivity Disorder
How lateral inhibition produces contrast enhancement. (Based on Ratliff, 1972.)
The seven components of the Wernicke-Geschwind model.