Aphasia is a disorder of oral expression, written expression and comprehension that occurs after damage to the language center, and is divided into the following categories: 1. Motor aphasia, also known as expressive aphasia, is a condition in which the patient can hear and understand what others say, but cannot speak for himself or herself, and is internally clear but unable to express his or her meaning in words. Part of motor aphasia can speak some simple words or sentences, but there will be obvious difficulties in finding words; 2, sensory aphasia, this kind of aphasia patients with normal hearing, but can not understand what others say, and can not understand what others want to express, but the patient himself can speak, vocabulary is also more but there are grammatical errors, content errors, belong to the inner clear, but can not correctly express what they want to express 3, aphasia, the patient does not have visual impairment, can see words and symbols but can not read them out, this condition is also accompanied by aphasia and aphasia; 4, other types, there are some rare conduction aphasia, naming aphasia, aphasia and so on.