Answer:
prompted by an underlying medical disorder.
Explanation:
"Secondary insomnia" is due to an <em>underlying medical disorder </em>such as <em>"Alzheimer's disease." </em>This is a<u> neurological disorder</u> that prevents a person from having a good quality sleep due to an increase presence of amyloid in the brain.
Other medical conditions that may lead to secondary insomnia are the following: <em>arthritis, heartburn, asthma, hot flashes, etc.</em>
