Skip Navigation
Search Menu
Neurology and Neurosurgery

In This Section      
Print This Page

Circadian Rhythm Disorders

The brain has an internal clock that regulates several biorhythms including the timing of an individual’s sleep-wake cycle. In most cases, the environment provides clues in the form of sunlight, activity, and temperature to help align this internal clock with the external environment. In situations when the two clocks are out of sync, individuals have difficulty sleeping during “conventional” sleep hours.

Circadian rhythm disorders can come in a variety of forms based on the pattern of the sleep clock misalignment, including:

  • Night owl form (CRD-delayed sleep phase syndrome)
  • Morning lark form (CRD-advanced sleep phase syndrome)
  • Shift work disorder
  • Jet lag

The misalignment between the internal clock and the environment can lead to a number of difficulties including insomnia, daytime sleepiness, and fatigue.

Request an Appointment

Maryland Patients

To request an appointment at the Johns Hopkins Hospital Sleep Disorders Clinic, please call 443-287-3313.

Adult Neurology: 410-955-9441
Pediatric Neurology: 410-955-4259
Adult Neurosurgery: 410-955-6406
Pediatric Neurosurgery: 410-955-7337

 

Traveling for Care?

Whether you're crossing the country or the globe, we make it easy to access world-class care at Johns Hopkins.

Outside of Maryland (toll free)
410-464-6713

Request an Appointment
Medical Concierge Services

International Patients
+1-410-502-7683

Request an Appointment
Medical Concierge Services

 
blue suitcase