Methods and compositions for risk detection, early diagnosis, prognosis, and monitoring of sleepiness in an individual by measuring the amount of specific biomarkers present in a bodily fluid and comparing them to a reference level of biomarkers in a sample from a healthy person, a person previously diagnosed with sleepiness, or an earlier sample from the individual of interest.

Embodiments of the invention relate to the use of a melatonin agonist in the treatment of free running circadian rhythms in patients, including light perception impaired patients, e.g., blind patients, and to methods of measuring circadian rhythm.

Embodiments of the invention relate to the use of a melatonin agonist in the treatment of free running circadian rhythms in patients, including light perception impaired patients, e.g., blind patients, and to methods of measuring circadian rhythm.

Compositions, methods, and kits are provided for diagnosing narcolepsy. Susceptibility to type 1 narcolepsy is linked with the human leukocyte antigen (HLA)-DQ6 allele and a single nucleotide polymorphism (SNP) in the T cell receptor gene segment TRAJ24. The presence of T cells reactive with hypocretin (HCRT) autoantigens is also associated with development of narcolepsy. Compositions and methods are provided for detecting autoreactive T cells specific for hypocretin (HCRT) autoantigens presented by HLA-DQ6.

Methods and kits are provided for collecting samples for assessment of circadian timing in a non-clinical environment. The methods include monitoring light exposure of a subject and placing a first biological sample in a first sample vial, wherein the first biological sample is obtained in the non-clinical environment in dim light comprising light less than about 50 lux and monitoring the use of the first sample vial with a monitoring device. The methods include placing a second biological sample from the subject in a second sample vial, the second biological sample being taking at a time interval after the first biological sample and monitoring the use of the second sample vial with the monitoring device. Kits include a photosensor, a plurality of sample vials free from labels, a label system for labeling the plurality of sample vials, and a monitoring device for monitoring use of the plurality of sample vials.

Embodiments of the invention relate to the use of a melatonin agonist in the treatment of free running circadian rhythms in patients, including light perception impaired patients, e.g., blind patients, and to methods of measuring circadian rhythm.

Embodiments of the invention relate to the use of a melatonin agonist in the treatment of free running circadian rhythms in patients, including light perception impaired patients, e.g., blind patients, and to methods of measuring circadian rhythm.

Embodiments of the invention relate to the use of a melatonin agonist in the treatment of free running circadian rhythms in patients, including light perception impaired patients, e.g., blind patients, and to methods of measuring circadian rhythm.

Embodiments of the invention relate to the use of a melatonin agonist in the treatment of free running circadian rhythms in patients, including light perception impaired patients, e.g., blind patients, and to methods of measuring circadian rhythm.

Embodiments of the invention relate to the use of a melatonin agonist in the treatment of free running circadian rhythms in patients, including light perception impaired patients, e.g., blind patients, and to methods of measuring circadian rhythm.