U.S. doctors online nowAsk doctors free
A 44-year-old member asked:

what are circadian rhythms?

1 doctor answer1 doctor weighed in
Dr. Heidi Fowler
Psychiatry 25 years experience
24 hour cycle: Circadian rhythms are cyclic changes in organism in response to lightness & darkness occurring every 24 hours.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
24/7 visits
$15 per month

Similar questions

A 31-year-old member asked:

Are circadian rhythm disorders hereditary?

2 doctor answers4 doctors weighed in
Dr. Michelle Zetoony
Sleep Medicine 18 years experience
Circadian rhythm: Good question. The short and long answer is yes. Advanced sleep phase and delayed have a well-established genetic link. The other circadian disturbances are not so well established (free running type or irregular sleep/wake schedule.
CA
A 25-year-old member asked:

Explain the circadian rhythm.?

1 doctor answer3 doctors weighed in
Dr. Colin Kerr
Family Medicine 44 years experience
Circadian rhythm: Circadian rhythm refers to a natural physiologic cycle in which certain processes ebb and flow in a predictable pattern over the day. In humans the basic cycle is tied to the sun with sleeping at night and activity during the day. But there are other cycles. For example, your lung airways naturally get tighter at night (4 am) and that is why asthma patients often get their first symptoms at night.
A 48-year-old member asked:

How do circadian rhythms works?

1 doctor answer1 doctor weighed in
Dr. Heidi Fowler
Psychiatry 25 years experience
Endogenous: A circadian rhythm comes full cycle every 24 hours. It is endogenous but believed by many to be influenced by the position of the moon to the earth.
A 36-year-old member asked:

What's your circadian rhythm based on?

1 doctor answer2 doctors weighed in
Dr. Christopher Abel
Pediatrics 26 years experience
24 hour rhythms: Circadian rhythms are biological processes that typically oscillate on 24 hour patterns. These processes repeat independent of external stimuli, but can be altered by external stimuli.
Dr. Nayana Trivedi
Internal Medicine 39 years experience
External Stimulus is Light and it affects on Pineal Gland to Secret Melatonin and affect sleep Wakefulness cycle.
Jun 6, 2014
A 45-year-old member asked:

What governs our circadian rhythm ?

1 doctor answer3 doctors weighed in
Dr. Michael Amster
Specializes in Pediatrics
Light / dark: The brain takes in light in decreasing and increasing amounts depending on time of day and time of year, and a center in the brain, the suprachiasmatic nucleus, placed over the optic nerves, takes the information, and sets the "internal clock". This nucleus tells the pineal gland when to secrete melatonin, the hormone that tells us when we're supposed to get sleepy.
Dr. Nayana Trivedi
Internal Medicine 39 years experience
Nicely Explained
Jun 6, 2014

Related questions

A 41-year-old member asked:
2 doctor answers10 doctors weighed in
A 40-year-old member asked:
2 doctor answers3 doctors weighed in
A 30-year-old member asked:
2 doctor answers6 doctors weighed in
A 18-year-old female asked about a 16-year-old male:
2 doctor answers2 doctors weighed in
A 34-year-old member asked:
2 doctor answers2 doctors weighed in

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
24/7 visits
$15 per month
Last updated Oct 31, 2014

People also asked

Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
24/7 visits
$15 per month

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.