Each chapter closes with Critical Thinking Questions (listed below) as a review of chapter material that focuses on the role of the medical assistant.

1. In some diseases, such as multiple sclerosis, myelin is destroyed. What is the function of myelin in the nervous system, and how can the destruction of myelin contribute to the signs and symptoms of multiple sclerosis?

2. What functional losses would you expect to observe in patients with the following brain injuries?

a. Stroke in an occipital lobe of the cerebrum

b. Damage to a temporal lobe of the cerebrum

c. Stroke in the medulla oblongata

d. Brain tumor in the primary motor area of the frontal lobe