Nasal cycle

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Evidence Based Medicine
Cochrane Collaboration on Nasal cycle Bandolier on Nasal cycle TRIP on Nasal cycle
Clinical Trials
Ongoing Trials on Nasal cycle at Clinical Trials.gov Trial results on Nasal cycle Clinical Trials on Nasal cycle at Google
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Healthcare Provider Resources
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The nasal cycle is the rhythmic, alternating side-to-side fluctuation in nasal airflow. It is known to be regulated by the autonomic nervous system probably from the centres located in brainstem. ^[1]

Nasal Cycle is the name given by western medicine for the readily noticeable pattern in human breathing - we do not breath equally (50:50) using both nostrils. At any given time, either the left or the right nostril is more actively breathing. Further, this one-sidedness reverses on a periodic basis. Much research has been done on the duration of nasal cycle.^[1]

Although readily noticeable, for some reason, this phenomenon has received very little attention under Western Medicine. The phenomenon was first noted by Kayser, a German rhinologist in Breslau, 1895. ^[1]

On the other hand, this alternate-nostril-breathing is central to various breathing practices such as Pranayama, in Yoga and also in various systems of Alternative medicines. As per these systems, breathing pattern is directly linked to the working of our minds. Balancing the left and right sides of the mind is ultimately desired.

In the field of Neurosciences, researchers can measure 'how active' each cerebral hemisphere is, at baseline and while performing specific tasks. It has been known for a long time that an ultradian rhythm of alternating cerebral hemispheric activity exists in humans and animals. At any given time, either the left OR the right hemisphere of the brain is 'more active' than the other and this hemispherical dominance changes periodically. Recent findings in neuroscience^[1] have revealed that the nasal cycle is intricately linked to the ultradian rhythm of alternating cerebral hemispheric activity. Whenever the nasal cycle switches sides, the hemispheric dominance also seems to change. Although a clear association between the two has been established, causality is still arguable - whether the nostril-change causes the change in hemispherical-predominance or vice-versa.

See also

• Lateralization of brain function - to know more about the left and right cerebral hemispherical functions and the pseudoscientific exaggerations surrounding this concept.

References

v • d • e WikiDoc Research Resources for Nasal cycle
Articles on Nasal cycle	Most recent articles on Nasal cycle • Most cited articles on Nasal cycle • Review articles on Nasal cycle • Articles on Nasal cycle in N Eng J Med, Lancet, BMJ
Media (Slides, Video, Images, MP3) on Nasal cycle	Powerpoint slides on Nasal cycle • Images of Nasal cycle • Photos of Nasal cycle • Podcasts & MP3s on Nasal cycle • Videos on Nasal cycle
Evidence Based Medicine Regarding Nasal cycle	Cochrane Collaboration on Nasal cycle • Bandolier on Nasal cycle • TRIP on Nasal cycle
Cost Effectiveness of Nasal cycle	Cost Effectiveness of Nasal cycle
Clinical Trials Involving Nasal cycle	Ongoing Trials on Nasal cycle at Clinical Trials.gov • Trial results on Nasal cycle • Clinical Trials on Nasal cycle at Google
Guidelines / Policies / Government Resources (FDA/CDC) Regarding Nasal cycle	US National Guidelines Clearinghouse on Nasal cycle • NICE Guidance on Nasal cycle • NHS PRODIGY Guidance • FDA on Nasal cycle • CDC on Nasal cycle
Textbook Information on Nasal cycle	Books and Textbook Information on Nasal cycle
Pharmacology Resources on Nasal cycle	Dosing of Nasal cycle • Drug interactions with Nasal cycle • Side effects of Nasal cycle • Allergic reactions to Nasal cycle • Overdose information on Nasal cycle • Carcinogenicity information on Nasal cycle • Nasal cycle in pregnancy • Pharmacokinetics of Nasal cycle •
Genetics, Pharmacogenomics, and Proteinomics of Nasal cycle	Genetics of Nasal cycle • Pharmacogenomics of Nasal cycle • Proteomics of Nasal cycle
Newstories on Nasal cycle	Nasal cycle in the news • Be alerted to news on Nasal cycle • News trends on Nasal cycle
Commentary on Nasal cycle	Blogs on Nasal cycle
Patient Resources on Nasal cycle	Patient resources on Nasal cycle • Discussion groups on Nasal cycle • Patient Handouts on Nasal cycle • Directions to Hospitals Treating Nasal cycle • Risk calculators and risk factors for Nasal cycle
Healthcare Provider Resources on Nasal cycle	Symptoms of Nasal cycle • Causes & Risk Factors for Nasal cycle • Diagnostic studies for Nasal cycle • Treatment of Nasal cycle
Continuing Medical Education (CME) Programs on Nasal cycle	CME Programs on Nasal cycle
International Resources on Nasal cycle	Nasal cycle en Espanol • Nasal cycle en Francais
Business Resources on Nasal cycle	Nasal cycle in the Marketplace • Patents on Nasal cycle
Informatics Resources on Nasal cycle	List of terms related to Nasal cycle

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Acknowledgement and Attribution Regarding Sources of Content

Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .