Melanopsin and S-cones battle for control of the pupil under blue light.
Seasonal affective disorder (SAD) affects over 10 million people in the US. Find out the symptoms and treatment options available.
According to a new study, there is no evidence that levels of depressive symptoms vary seasonally.
A treatment shown to improve symptoms of SAD has proven to be effective for treating bipolar disorder. Researchers report a six week course of bright light therapy improves symptoms of depression and daily functioning for bipolar patients.
Researchers identify an interspecies correlation between hair cortisol concentrations in humans and dogs during summer and winter months. The cortisol levels were not affected by the amount of activity the dog had during these periods. The study reveals a seasonal effect in higher cortisol levels between humans and animals, and human personality traits significantly affected the dog's level of stress. Findings suggest that dogs often mirror the stress levels of their owners.
Neuroimaging study reveals how light-sensitive signals reach the brain and how regions associated with mood process those signals. Some regions of the cerebral cortex associated with cognitive and mood processing show sensitivity to light intensity.
A new study implicates the dorsal raphe nucleus in seasonal affective disorder.
Researchers identified molecules that can modulate circadian rhythms by binding to the MT1 melatonin receptor in the hypothalamus.
Fish model study found a potential target for the treatment of seasonal affective disorder (SAD). Researchers implicated NRF2 in seasonal depression and reported celastrol may help in the treatment of SAD.