http://www.nhlbi.nih.gov/health/public/sleep/ healthy_sleep.pdf

Information about Sleep Disorders

http://www.nlm.nih.gov/medlineplus/sleepdisorders.html

NHLBI Diseases and Conditions Index – DCI

This section includes articles about sleep disorders, tests, procedures, as well as videos, podcasts and Spanish-language articles.
http://www.nhlbi.nih.gov/health/dci/index.html

Refer to Pain and Sleep References

Patients with acute low back pain are more likely to have poor sleep quality than those with good sleep quality.
http://www.ncbi.nlm.nih.gov/pubmed/24782195

Patients suffering from neck pain are less likely to improve if they have poor sleep quality.
http://www.ncbi.nlm.nih.gov/pubmed/25171635

Individuals with mechanical neck pain experience myofascial trigger points that can cause pain, disability, or poor sleep quality.
http://www.ncbi.nlm.nih.gov/pubmed/23158466