The document discusses three topics related to the nervous system: algesia is the sensation of pain, analgesia is the loss of pain sensation from interrupting the nervous system pathway, and dysphasia is an impairment in the ability to express or comprehend speech or writing, with more severe cases called aphasia.
3. DysphasiaDysphasia- one in a group of speech disorders in which there is impairment in the power of expression by speech, writing, or signs, or impairment of the power of comprehension of spoken or written language. More severe forms of dysphasia are called aphasia.