Circadian Sleep Disorders Network - Advocating for people with misaligned body clocks
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ON THIS PAGE (links):
What Are CRSDs?
*** Join! ***
*** Take the Survey! ***
Find a Doctor
Help Spread Awareness
News Items
DSPD at Stanford MedX
CSD-N Seeks Candidates
NIH Adds Circadian Rhythm Disorders
CRD Article in A2Zzz Magazine
Seeking Teen Night Owls
New MAB Member
SLEEP 2019 Conference
Needed Research Document
Money for Sleep Research
CSD-N Supports Later School Start Times in Texas
Wrong Side of Time Zone
Student Project Continues
CSD-N Attends WODC
Potential DSPD Drug
Letter to Congress
Social Media Liaison
NIH Website Campaign Update
Archived News
More About Us
Email List
Q&A Docs (FAQs)
Basic Fact Sheet
Start School Later
Amazon to Donate to CSD-N
Recently Added References
Facebook, LinkedIn, Twitter
Media Kit
Our Email & Office
The shortcut also gets you to this page, with less typing! But don't forget the hyphen!

Our Mission

Circadian Sleep Disorders Network is an independent nonprofit organization dedicated to improving the lives of people with chronic circadian rhythm disorders.

We aim to increase awareness within the medical community and among the general public, to provide emotional support and practical ideas for people living with these disorders, to inform patients and health care providers about treatment options, to encourage research into circadian rhythms, and to advocate for accommodations in education and employment for people with circadian rhythm sleep disorders.

Note that Circadian Sleep Disorders Network is not affiliated with any pharmaceutical, medical device, or other company.

What Are Circadian Rhythm Sleep Disorders?

Circadian Rhythm Sleep Disorders (CRSDs or CRDs) are neurological disorders in which the sleep-wake cycle is out of sync with the day-night cycle. These include in particular Delayed Sleep Phase Disorder and Non-24-Hour Sleep-Wake Disorder. Also included are Advanced Sleep Phase Disorder, Irregular Sleep Wake Disorder, and Shift Work Disorder, which are defined here.

Delayed Sleep Phase Disorder (DSPD), also called Delayed Sleep Phase Syndrome (DSPS), is characterized by an inability to fall asleep until very late at night, with the resulting need to sleep late in the morning or into the afternoon. Questions? See our DSPS Q&A.

Advanced Sleep Phase Disorder (ASPD), also called Advanced Sleep Phase Syndrome (ASPS), is the opposite. It is characterized by falling asleep very early in the evening, and waking up in the wee hours of early morning, unable to sleep further.

Non-24-Hour Sleep-Wake Disorder (Non-24), also called Free-Running Disorder (FRD), is a condition in which a person's day length is significantly longer than 24 hours, so that sleep times get later each day, cycling around the clock in a matter of days or weeks. Questions? See our Non-24 Q&A.

Some people use the term reverse sleep, referring to the fact that sometimes people with DSPD and Non-24 end up sleeping during daylight and being awake at night.

Please refer to our descriptions, definitions, and treatments pages for more details, and print out our brochure, fact sheet, and/or Q&A documents to give to others.

Become a Member! or Renew Now!

We can progress toward our mission of promoting awareness and accommodation only if we can demonstrate that we represent a community of people who suffer from these disorders. Please join now, so we can better help you and the CSD community in achieving our common goals. Together we have a voice! More details are on the Join page.

Last year's members: if you haven't renewed yet, please do so now. Renew now!

We are a 501(c)(3) organization based in the U.S., serving the global circadian sleep disorders community. We are a patient organization, entirely supported by member dues and contributions. We are all unpaid volunteers.

Take Our Survey!

Circadian Sleep Disorders Network has launched its PATIENT POWERED REGISTRY AND SURVEY for people with Circadian Rhythm Sleep Disorders. The registry is open to anyone with a circadian rhythm sleep disorder from any country. You can sign up for the registry and take the survey (it's free) at

By collecting information from a large number of people actually suffering from these disorders, we can stimulate research into causes, treatments, and effects of circadian disorders.

We often complain that so little research has been done on people suffering with Circadian Rhythm Sleep Disorders. One reason is the difficulty researchers have in locating people with these disorders. Well, this is your chance! You can make a difference!

The information you provide can jump-start research on some of the questions we've been asking about for years - but only if enough people participate. You can also optionally allow researchers to contact you to participate in studies. Sign up now (free), and please take the survey.

Note that the signup questions that you get first are not the survey! Part of the signup process with Invitae (the registry host, formerly AltaVoice) involves answering two pages of demographic questions like age, gender, race, etc. This is not our survey.

After you've finished signing up you will be taken to our survey, called "Circadian Rhythm Sleep Disorders", which asks about your circadian disorders, sleep habits, treatment, and other disorders. Our survey has multiple pages. The actual number is dependent on how you answer some key questions. Please be sure to complete the entire survey. Otherwise, your responses will not be used in analysis.

For more information, and to review the survey instructions and definitions, click here.

Researchers: You can view the survey questions without taking the survey here. You can request participants to contact you for further research by contacting Invitae PIN (Patient Insights Network) (website) or emailing Circadian Sleep Disorders Network at for further information.

Help Us Spread Awareness

image of brochure cover We are asking our members and followers to give our brochure, and/or our Q&A booklets, to their sleep doctors and their general doctors on their next visits. It is vital to all of us suffering from circadian disorders that more doctors and their support staff understand these disorders and how disruptive they can be. The more doctors who know about us, the more patients we can reach, inform, and support. And the larger our membership, the more credible our voice on behalf of all people with circadian sleep disorders.

You can print out the brochure on U.S. letter paper (8½x11) or on A4 paper (non--U.S.). Booklets can be printed for DSPS or for Non-24 (the same file can be printed on either U.S. or A4 paper). Alternatively you can email us at to request a printed copy of any or all these documents (please specify which). Be sure to include your name and full postal address. We will send these at no charge to you.

News Items

DSPD Presentation at Stanford MedX

MedX Flyer with Alex At the Stanford Medicine X conference in September, CSD-N Board Member Alexandra Wharton gave a talk titled Night Owls and Late Chronotypes Unite — Let's Stop Living Against Our Body Clocks!

During the presentation, she explained what Delayed Sleep Phase Disorder is, the challenges of diagnosing it, and its possible causes including recently discovered genetic variants. Attendees learned that the 2017 Nobel Prize for Medicine was awarded to scientists studying the circadian clock, and that research in how a person's circadian clock affects their physical and mental health is growing.

She stressed that DSPD is intractable and can't be adjusted with willpower or self-discipline; it is a physiological - not a psychological - condition. She described how living against one's body clock is damaging, and that later start times at work and school are imperative for late chronotypes.

The session had a rapt audience of healthcare providers, researchers and patients, and the level of discourse was encouraging. There was a discussion following the presentation about how DSPD is frequently mistreated: SSRIs can make night owls more sensitive to light, phase-delay chronotherapy can turn DSPD into Non-24, and long-term benzodiazepine use is dangerous.

The theme of this year's Medicine X conference, Listening to patient voices drives change in healthcare, aligns with CSD-N's tagline, Together we have a voice. CSD-N's successful letter-writing campaign asking the NIH to include circadian rhythm disorders in its list of sleep disorders exemplifies how a community of patients can bring about change.

CSD-N Seeks Candidates for Board

CSD-N logo Oct 2019
Circadian Sleep Disorders Network will be holding elections for its Board of Directors, and is seeking some new faces. Please read the requirements. Meetings are held by online forum, so you can log in at any time of day to read what's been posted and post your replies. Meetings do continue for a month or more, though often not very actively.

If you're interested, please let us know soon (latest Nov 10), following the instructions at the end of the above document. Directors start serving January 15, 2020. Terms generally run for two years. There are five open slots, and only three incumbents are planning to run again, so we encourage interested people to run.

We are also looking for a new secretary and other volunteers willing to help. These officers can be board members but do not have to be. The main duty of the secretary is to write up minutes of the meetings, which are held by online forum. If you're interested, please let us know soon, following the instructions at the end of the above document.

NIH Adds Circadian Rhythm Disorders to its Website!!! (Finally.)

NIH logo Sept 2019
Now there's a respected U.S. government website you can point disbelieving friends and relatives to, that clearly acknowledges our disorders:

They have also included links to our Q&A docs (DSPD and Non-24) and our simplified Fact Sheet, under More Information/Non-NHLBI resources.

The lack of coverage of Circadian Rhythm Sleep Disorders on the NIH website has been a particular concern of our president, Peter Mansbach, who continued raising the issue with NIH every year for the past seven years. Some of you helped with our email campaign several years ago - thank you. And thanks to the NIH Sleep Disorders Research Advisory Board (including our representative Susan Plawsky) who supported our effort. And to Dr Michael Twery, head of the NIH National Center for Sleep Disorders Research, who helped make this happen.

CRD Article in A2Zzz Magazine

A2Zzz cover Sept 2019
CSD-N president Peter Mansbach has written an Overview of Circadian Rhythm Sleep Disorders for the 2019 Q3 issue of A2Zzz, the magazine of AAST (formerly the American Association of Sleep Technologists).

Among other things, he emphasizes the need for laboratory sleep studies to be performed according the patient's circadian clock rather than expecting the patient to sleep at the lab's normal study time.

Seeking Teen Night Owls for Study

Biological Rhythms Research Lab logo Sept 2019
Night owls between the ages of 14 and 17 are wanted for a 3-week study to test whether wearing glasses that block different amounts of light in the evening affect your body clock and could help teenagers sleep and feel better. The study is being performed at the Biological Rhythms Research Laboratory, which is affiliated with Rush University and is located in Chicago, IL.

For more information and to apply, visit:
Questions? Email

New Medical Advisory Board Member

Dr Klerman Aug 2019
Circadian Sleep Disorders Network is pleased to welcome Dr Elizabeth Klerman to our Medical Advisory Board. Dr Klerman had invited us to participate in the AASM Working Group on circadian rhythm research needs, and has worked with us on a grant application. We welcome her expertise and interest in Circadian Rhythm Sleep Disorders.


NIH logo Aug 2019
The Sleep Disorders Research Advisory Board (SDRAB) of the NIH (U.S. National Institutes of Health) met on Aug 1 and 2 to work on their Sleep Disorders Research Plan. Susan Plawsky, our circadian rhythm disorders (CRD) patient representative, attended both days. She ably represented our interests, again urging that CRDs receive adequate emphasis. She plays an important role in calling attention to places where CRDs are likely to be overlooked. The other participants on the SDRAB were receptive to our point of view.

Our president, Peter Mansbach, and member Alexandra Escalera also attended Aug 1, and made brief statements on behalf of CRD patients during the public comment period.

As some of you know, Circadian Rhythm Sleep Disorders are still not listed (as of Aug 2019, when this article was written) or described on the NIH website. We have been asking for this to be added for seven years now. At this meeting the Web Communications Group reported that a new sleep page is live, and Circadian Rhythm Sleep Disorders will be added in September. We hope so, although we have not yet seen any proposed content. (Note added Sept 30: it has finally been added. See article above.)

SLEEP 2019 Conference

SRS logo June 2019
On June 8-12 the 2019 SLEEP Conference, the annual meeting of the American Academy of Sleep Medicine (AASM) and the Sleep Research Society (SRS), was held in San Antonio, TX.

The conference presented and discussed the latest developments in clinical sleep medicine, and sleep and circadian research. Alexandra Wharton, a board member for Circadian Sleep Disorders Network, attended the Tuesday sessions on an 'Advocate' pass.

During the four-day event, there were more than 100 sessions, with 24 focusing on circadian rhythms. This is quite an increase from just a few years ago.

UCSF (University of California San Francisco) researcher Dr. Louis Ptacek, a pioneer in establishing genetic studies for sleep behavior, discussed his research on humans, fruit flies, and mice, probing the biology regulating the body clock and sleep.

Dr. Phyllis Zee of Northwestern University spoke about the impact circadian rhythms have on weight gain for children and adults. A new study finds that light exposure overnight during sleep has been shown to influence metabolism and highlighted the importance that properly timed light be considered as part of a healthy lifestyle. Dr. Zee also discussed important advances that were made this year in terms of blood testing to identify gene expression to determine circadian timing.

California State Senator Anthony Portantino received an AASM award for his work developing public policy that moves school start times later so students get adequate sleep. His bill, SB-328, Pupil attendance: school start time, would require the school day for middle schools and high schools in California to begin no earlier than 8:30 a.m.

Other hot topics included how essential proper sleep is to mental health, if cannabis is effective for improving sleep, and the need for standards for measuring sleep cycles with wearables.

CSD-N Invited to Participate in Research Working Group,
Submits Needed Research Document to AASM

June 2019
We have submitted a Needed Research document to the working group preparing a white paper on circadian rhythm sleep disorders research needs. This is a real opportunity for CSD-N to advocate for the research we keep wishing to be done.

AASM logo Susan Plawsky, our representative on the NIH Sleep Disorders Research Advisory Board (SDRAB), has been in contact with Dr Elizabeth B Klerman, a sleep research physician and professor at Harvard Medical School. Dr Klerman is on the committee of scientists working on a white paper on needed circadian rhythm research for SRS/AASM (Sleep Research Society/American Academy of Sleep Medicine) and SRBR (Society for Research on Biological Rhythms), at the SLEEP 2019 conference in June. She asked Susan to prepare a list of research issues that CSD-N would like to see addressed.

Susan had previously requested input from our entire community for such a list that she used at the NIH Sleep Disorders Research Advisory Board meetings, and her initial list for Dr Klerman included those suggestions from the community. Time was short, so we have not been able to ask for new input from the community.

James Fadden, Peter Mansbach, and Susan have prepared a document on behalf of CSD-N, elaborating on those suggestions and presenting a more detailed list for Dr Klerman to present to their committee. We apologize if we have overlooked something, but we have worked day and night (mostly night wink ) to finalize this in time.

You can see our Needed Research document at .

We appreciate the working group's interest in hearing the patient point of view.

Congressional Committee Appropriates Money for Sleep Research

May 2019
Last week, the U.S. House Appropriations Committee on Labor, Health and Human Services, and Education (LHHS) advanced a key bill that would provide important funding for sleep research and education projects in Fiscal Year (FY) 2020. The bill includes a total of $41.1 billion in funding for the National Institutes of Health (NIH), an increase of $2 billion over FY 2019. Of specific interest to our community, the Committee published a recommendation on Sleep Disorders stating:

The Committee commends the recent expansion and advancement of the sleep and circadian research portfolio under the coordination of the National Center on Sleep Disorders Research (NCSDR). The Committee encourages dedicated research activities on specific sleep disorders, such as narcolepsy and restless legs syndrome, to ensure scientific progress benefits patients impacted by debilitating conditions disordering their sleep and biological rhythms.
Language like this has been a driving force behind the recent funding expansion of the sleep and circadian research portfolio at NIH. With additional congressional focus on individual sleep disorders, we should expect to see meaningful investment in specific sleep conditions moving forward.

The bill also includes a total of $8.3 billion for the Center for Disease Control and Prevention (CDC), an increase of $921 million over FY 2019. Importantly, the legislation set aside $3 million for Chronic Disease Education and Awareness, as a new program that would award grants to address chronic diseases and their risk factors. This new program could help to fund critical sleep education and awareness, but more on this effort coming soon!

We note that this is just the start of a long legislative journey. The bill must pass the full house, then pass the Senate, and be signed by the President.

CSD-N Supports Later School Start Times in Texas

Alexandra testifies

Apr 2019
CSD-N board member Alexandra Wharton called our attention to a bill (HB 1602) pending in the Texas legislature that would require schools in Texas to start no earlier than 8:00 a.m. She herself testified at the Texas House Public Education Committee hearing on April 4, 2019 at the state capitol in Austin, and she suggested CSD-N write a letter of support. You can view her testimony here (using her married name Alexandra Spencer), and read our letter here. Unfortunately the bill died in committee. However, there is continuing interest on the part of some of the legislators, and it is expected to be revived in the next session with better chances.

Living on the wrong side of a time zone can be hazardous to your health

Apr 2019
Interesting article in the Washington Post: How living on the wrong side of a time zone can be hazardous to your health.

Student Project Continues

Booth at the School Fair

Apr 2019
Last October we reported that Elizabeth McDougall, eighth grader and recipient of the Edward R. Foley Citizenship Prize at Derby Academy in Hingham, Massachusetts, was doing her community project on Circadian Rhythm Sleep Disorders. She sent this progress report:

I just wanted to let you know that, a few weeks ago, I asked students in our upper school to create posters about Circadian Rhythm Sleep Disorders based on information they learned from my presentation or anything they learned from their own research. We hung them in our Brown Art Gallery so that the rest of the school and visitors could see them. I attached a picture of some of them. [Webmaster's note: we do not have permission from the makers of the posters, or their parents, so we have not posted the photo.] The students who created a poster could ignore dress code for a day. They could even wear their pajamas to school, if they wanted to.

Also, Will Slotnick, founder of Wellness Collaborative, comes to our school for a couple of weeks each year to provide drug education, stress management, and mindfulness training to students, parents, faculty, and administrators. He is joined, for one of the days, by the local D.A.R.E. officer. This year, my mother and I brought them up-to-date on my brother's diagnosis and how circadian rhythm sleep disorders can appear to be depression, anxiety, or defiance. From now on, they will keep this in mind when when they work with other students.

Tonight is our school's annual talent show. I will be selling refreshments at intermission at a table displaying your poster and pamphlets. We are expecting approximately 250 people so hopefully I will help spread awareness to family and friends of our school community.

I notice on your website that you are working to include Circadian Rhythm Disorders on the National Institutes of Health website. That would bring much more visibility, and hopefully eventually more funding, to these devastating disorders.

Thank you again, Ms McDougall!

CSD-N Attends World Orphan Drug Congress

Apr 2019
Our president, Peter Mansbach, was invited to attend the 2019 World Orphan Drug Congress USA at National Harbor, MD. This is sponsored by companies working on solutions for rare diseases, and rare disease organizations including NORD and EURORDIS. There is increasing emphasis on including patient perspectives in all stages of pharmaceutical research, including setting treatment goals ("endpoints") and finding patients for trials. Peter participated in a round table discussion on endpoints, and attended several talks. WODC Panel Discussion

Hetlioz To Be Tested For DSPD

Mar 2019
Vanda Pharmaceuticals is planning Phase II trials this year for Hetlioz® as a treatment for DSPD (Delayed Sleep Phase Disorder). Hetlioz is already approved (in the U.S.) for treatment of Non-24-Hour Sleep-Wake Disorder, in both blind and sighted individuals. Hetlioz is the brand name of tasimelteon, which is a melatonin agonist (i.e. it works similarly to melatonin).

CSD-N Signs Letter to Congress

Feb 2019
CSD-N, along with other sleep organizations, has signed on to a letter requesting the U.S. Congress to restore funding to the CDC (Center for Disease Control and Prevention [U.S.]) dedicated to sleep research and awareness. You can read the letter here. Thanks to Julie Flygare at Project Sleep for pulling together all these sleep organizations.

New Social Media Liaison

Alexandra Wharton Jan 2019
New CSD-N board member Alexandra Wharton has been appointed as CSD-N's Social Media Liaison. She will take charge of our Twitter feed and LinkedIn page, and may contribute to our Facebook page and other social media outlets as she sees fit. Thanks to Jennifer Silvia, our previous social media liaison, who handled these duties in the past.

Campaign to get CRDs on NIH Website - Update

Jan 2019
Peter Mansbach speaking at NIH SDRAB For SIX YEARS we have been trying to get Circadian Rhythm Sleep Disorders (CRSDs) listed and documented on the NIH website. That campaign came to a head at the SDRAB (U.S. NIH Sleep Disorders Research Advisory Board) meeting on Friday, Jan 18. We had a half hour segment on the agenda at 1:30 pm to present our case and to hear from the OSPEEC (Office of Science Policy Engagement, Education, and Communications - the office which controls the website) which has in the past been unresponsive. Peter Mansbach (in photo) presented brief arguments and history, which is posted at That document includes a proposed resolution that was to be presented to the SDRAB, and which included our proposal for minimum web content.

Our arguments were well received, both by the SDRAB and the OSPEEC. The director of OSPEEC assured us that they are in full agreement. Their content person said they are working to make the website more accessible and discoverable, with new central pages to assist navigation. Peter expressed concern that our additions were being deferred for other design goals, when our proposed content can fit seamlessly into the present design and still be used as topics get rearranged. The director assured us that the "process [for including CRSDs] has begun", and our new elements can be develped concurrently. However, it sounded like it would take at least 6 months to get anything posted, and probably longer. It's a large bureaucracy.

Susan Plawsky, our CSD-N representative on the SDRAB, spoke in support. Linda Secretan, the patient representative for Restless Legs Syndrome (RLS), gave a strong statement of how helpful it has been to the RLS community to have RLS on the NIH website - it's validation of a disorder that many people otherwise just find amusing. Dr Sairam Parthasarathy and others spoke in support. It was felt unnecessary to formally vote on our proposed resolution, since we had so much support from the SDRAB.

Dr Michael Twery at NIH SDRAB The bulk of the meeting, of course, was devoted to the details of developing the next Sleep Disorders Research Plan, optimistically scheduled to come out this June. Many thanks to Susan Plawsky for continuing to represent CSD-N and the Circadian Rhythm Sleep Disorders community in this endeavor. The photo is of Dr. Michael Twery, director of NCSDR (National Center for Sleep Disorders Research) addressing the SDRAB. In the foreground are Dr Aaron Leposky, NCSDR staff, and Dr Gabriel Haddad, current chair of the SDRAB.

Archived News

Archived News 2018
Archived News 2017
Archived News 2016
Archived News 2015
Archived News 2014
Archived News 2013
Archived News 2011 - 2012 (incomplete)

More About Us

Niteowl Email List

This is a free mailing list support group for people with DSPS and Non-24 to share their experiences. It's a good place for people just discovering these disorders to hear how others deal with them, as well as for long-time participants to get support and to provide support to others. There are often discussions of evolving treatment, useful to all. For further information, and to sign up, go to

Note that membership in Circadian Sleep Disorders Network and membership on this email list are completely separate.


Circadian Sleep Disorders Network is affiliated with this email list, and our volunteers assist the list administrator with some chores. CSD-N was formed by participants on this list, and many of our members post regularly. But we have no control over what appears or who can join, and list membership is completely separate from membership in CSD-N.


Once you've signed up for the list, you post by sending an email to Everyone on the mailing list receives that post as an email, and you receive everyone else's posts as emails. If you don't like to get separate emails, you can opt to receive in digest form, typically one email a day containing all the day's posts. You make that selection after signing up by logging in (using the password you created when signing up for the email list) at


There are some rules:
The rules that the list software enforces are

One frequent problem is that people with more than one e-mail account try to send from an address that isn't registered as a member here. An infrequent problem is that a few e-mail providers aren't accepted at all so another e-mail account must be (acquired and) used. gmail generally works well.

An additional rule is PLEASE do not just reply to a message with a subject line containing "Niteowl Digest, Vol xxx, Issue xxx". That is obviously not informative and if you aren't careful you may include the whole list of messages in the Digest, making your message too large for the list.

Digest or not, it is a good idea to trim whatever you are replying to leaving just enough for people to know what you are replying to.

Of course, don't be snippy or insulting, and please take off-topic conversations off-list. And no advertising.


Once you've signed up for the list, you can also browse previous posts in the archive at

There is also a mirror of the archive on Yahoo at This is useful when the primary archives are not working, as sometimes happens. Login to your Yahoo account, or create one (free) - link is at the top right on that page. Then you have to join the Yahoo copy of the list - this is separate from signing up for the list itself - there is a button on the Yahoo page to do this.


To unsubscribe from the Niteowl email list go to
and follow the directions at the bottom of the page. You will need to know your list password.

If you do not know your list password, send email to
with PASSWORD in the subject line. This email must come from the same email address that you subscribed from (which is the one your incoming Niteowl list emails go to). Your password will be sent to you at that address.

If that doesn't work, you can unsubscribe by sending email to
with UNSUBSCRIBE in the subject line. This email must come from the same email address that you subscribed from (which is the one you your incoming Niteowl list emails go to). If you do this, you will get an email back asking you to confirm. You must follow the instructions and confirm, or you will not be unsubscribed.


For more (or more current) help on list commands, send email to
with HELP in the subject line.

Our Brochure

image of brochure cover Our brochure is geared to the general public, to introduce DSPD (DSPS) and Non-24 to people experiencing symptoms of these disorders, and to their families. Please distribute it to anyone who may be interested. Print on lightly colored paper for some color, if you like. We used ivory.

Brochure - web display     Print on US letter size paper, PDF
Print on A4 size paper, PDF

The web display version shows the brochure panels in easy-to-read order. The print versions are meant to be printed out on both sides of a sheet of paper, then folded in thirds, creating a brochure. (In the print version, the panels will appear out of order on-screen.)

Our Q&A Documents (FAQs)

We have posted documents describing DSPD (DSPS) and Non-24, in an easy to read Question-and-Answer format. These are designed to give to family members, friends, employers, and school personnel, to help them understand these disorders. Feel free to print and distribute these. There are two different (but similar) versions, one for DSPD and the other for Non-24:

DSPD Q&A - web     printer     booklet*
Non-24 Q&A - web     printer booklet*

The web formats display nicely in your browser. The printer versions are formatted by your browser for printing a multi-page document. The booklet forms are pre-formatted PDF files that you can print on two sides of a single sheet of paper, which then folds in half into a booklet.
* When printing the booklet, be sure to flip on the short edge (select this option if you have a double-sided printer).

In Other Languages:

Spanish:     DSPS Preguntas y Respuestas - web     printer    
     No-24 Preguntas y Respuestas - web     printer    
German:     DSPS F&A - web     printer    
     Non-24 F&A - web     printer    

Our Basic Fact Sheet

We also have a one page Basic Fact Sheet that introduces DSPD and Non-24 to people who don't know about them. It's a quick and easy read, just the basics.

Our Infographic

infographic thumbnail Former board member and artist Lily Style has created an infographic describing Circadian Rhythm Sleep Disorders. View it in your browser at Feel free to repost the graphic to help raise awareness.

You can print it directly from your browser (we suggest making the browser window full screen - the image will resize). We are also posting JPG images in various proportions for printing directly on different sizes of paper:

You can download these (in Microsoft Windows, right-click and select Save As). To print in Microsoft Windows, right-click on the downloaded file (in File Explorer) and select Print. Or open it in a photo- or image-processing program to use that program's features such as borderless printing.

CSD-N Merchandise

CSD-N mug We are offering merchandise (mugs, T-shirts, tote bags, bumper stickers, and a messenger bag) with our name and logo through CafePress, at (Note: if you just search CafePress you will find this merchandise, but at a higher price!)

Start School Later

Circadian Sleep Disorders Network is a Coalition Partner of Start School Later. We understand only too well the difficulties many teens have with early school start time, and we support the move to start school later.

Amazon Will Donate Part of Your Purchase to CSD-N

Circadian Sleep Disorders Network
The first time you go to you will be asked to confirm Circadian Sleep Disorders Network as your charity. Amazon will remember your selection. But you do have to go to instead of simply, for each purchase, if you want 0.5% of that purchase to go to CSD-N. Note that you pay the same amount either way - through Smile the 0.5% goes to us, otherwise it goes to Amazon.

We have already received several contribution checks from Amazon! Please select Circadian Sleep Disorders Network as your charity.

Amazon and the Amazon logo and AmazonSmile and the AmazonSmile logo are trademarks of, Inc. or its affiliates.

Recently Added References

This is a list of refences added to our Info page since the last newsletter. The newsletter lists references added since the previous newsletter. These are generally available to members only.


This web site is intended to provide generic information about Circadian Rhythm Sleep Disorders, and is not intended to replace discussions with a healthcare provider. You should not use the information on this website for diagnosing or treating a medical or health condition. All decisions regarding patient care should be made with your healthcare provider.


Office: 4619 Woodfield Rd, Bethesda, MD 20814
Phone: By appointment only, please.

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© 2019 Circadian Sleep Disorders Network
Last modified Oct 27, 2019
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