A business traveler has just arrived in Japan from the United States. During a meeting with his customer, he begins to experience yawning and stretching with an inability to stay focused on the meeting. He also has some eye irritation and has developed a headache. Based on these clinical manifestations, what diagnosis would most likely be causing these symptoms?
A) Advanced sleep phase syndrome
B) Delayed sleep phase syndrome
C) Free-running sleep disorder
D) Time zone change syndrome

Question

Quizplus · Accepted Answer

All of the symptoms are manifestations of jet lag syndrome. Answer choice A relates to early sleep onset and early arising, where people have trouble staying awake in the evening. Answer choice B relates to difficulty in falling asleep at a conventional hour of night and awakening on time in the morning. Answer choice C relates to a lack of synchronization between the internal sleep-wake rhythm and the external 24-hour day, seen commonly in blind people.

A Business Traveler Has Just Arrived in Japan from the United