<prompt> Answer this question truthfullyWhat is narcolepsy, and what information is accessible regarding it?  <response>: <reason> The doctor will perform a physical exam and order blood work to rule out conditions that can cause similar symptoms.Conditions that can cause excessive sleepiness include:Insomnia and other sleep disorders Restless leg syndrome Seizures Sleep apnea Other medical, psychiatric, or nervous system diseasesOther tests may include:ECG measures the hearts electrical activity EEG brain activity measurements Monitoring of breathing Genetic testing to look for narcolepsy geneTests will also include a sleep study polysomnogram. The Multiple Sleep Latency Test MSLT may be used to help diagnose narcolepsy. This test measures how long it takes you to fall asleep during a daytime nap. Patients with narcolepsy fall asleep much faster than people without the condition. 