Many aphasics do not show total language loss. Rather, different aspects of language are impaired. Aphasics in ______ area reveal word-finding difficulties and problems with syntax.

单项选择题Psychologists, neurologists and linguists have concluded that, in addition to the motor area which is responsible for physical articulation of utterances, three areas of the left brain are vital to language, namely, ______.

单项选择题Lying under the skull, the human brain contains an average of ten billion nerve cells called ______.