Quote:
Originally Posted by BethRags
The link is times out for me, unfortunately.
There's this: Impact of sunlight on the age of onset of bipolar disorder
"Many lines of evidence converge to support the idea that a large monthly increase in solar insolation may be associated with the emergence of bipolar disorder. (i) Clinicians have long noted circadian abnormalities in patients with bipolar disorder, including sensitivity to light and sleep/wake cycle disturbances (31, 45). Even small circadian rhythm changes may be associated with adverse health outcomes such as suicide risk (46). (ii) Some patients with bipolar disorder experience seasonal variation (47). (iii) Light therapy for depression has induced a switch to mania in some patients (48, 49). (iv) Studies of seasonal variation in suicide have reported a spring peak in countries with large fluctuations in solar insolation, such as in northern Europe, and no peak near the equator (23, 50–52). (v) Violent suicide has been associated with an increase in sunlight duration (53), and this may involve seasonal variation in serotonergic, metabolic, and immune system variables (54–56). (vi) Within the brain, there is a seasonal variation in the concentration of serotonin and serotonin transporter binding (57, 58), and serotonin production is stimulated by light exposure (57). (vii) Patients with bipolar disorder may have abnormalities in melatonin secretion (59). (viii) There may be a genetic component underlying human rhythm disorders (30), and circadian gene polymorphisms may increase susceptibility to bipolar disorder (60). (ix) Light exerts effects through retinal ganglion cells, which are separate from rods and cones and have non-visual functions, including regulation of the biological clock (61). Overall, there is strong evidence that light affects human neurophysiology and behavior." |
Thank you, that one's as good as the one I found. I relate to a lot of these. I have also found that I'm very sensitive to circadian rhythm changes. Even daylight saving time messes me up for weeks, not to mention jet lag. Here also, people have told me it's "impossible" for DST to hit me so hard. I'm not sure I ever really adjust to it. I only feel "right" once I'm back on winter time. The long light in the summer is hell for me.
Edit: here's the article I meant originally:
[link]. Should be a permalink this time.