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High Quality Content by WIKIPEDIA articles! Exposing skin to sunlight presents both health risks and health benefits. Sunlight is the major source of vitamin D-producing Ultraviolet B radiation, which has a wide range of positive health effects, including possibly inhibiting the growth of some cancers. On the other hand, long-term sunlight exposure is known to be associated with the development of skin cancer, skin aging, immune suppression and eye diseases such as cataracts. Sun exposure has also been associated with the timing of melatonin synthesis and reduced risk of seasonal affective disorder. A number of public health organizations state that there needs to be a balance between having the risks of having too much and the risks of having too little sunlight. There is a general consensus that sunburn should always be avoided. ... Read more

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3 Book Set: Seasonal Affective Disorder (SAD); The Hibernation Response; The Light Book Set ... Read more

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High Quality Content by WIKIPEDIA articles! Seasonal Affective Disorder (SAD), also known as winter depression or winter blues, is a mood disorder in which people who have normal mental health throughout most of the year experience depressive symptoms in the winter or, less frequently, in the summer, spring or autumn, repeatedly, year after year. In the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV), SAD is not a unique mood disorder, but is "a specifier of major depression". The US National Library of Medicine notes that "some people experience a serious mood change when the seasons change. They may sleep too much, have little energy, and crave sweets and starchy foods. They may also feel depressed. Though symptoms can be severe, they usually clear up." ... Read more

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Light therapy is an effective, evidence-based, non-pharmacological treatment for seasonal affective disorder (SAD) and other depressive and circadian sleep conditions. This step-by-step guide helps busy mental health clinicians and other health professionals to better diagnose SAD and incorporate light therapy into their everyday clinical practice. The authors summarize the diagnostic process, describe a simplified method for light therapy and provide practical information on how to evaluate and obtain light devices. Invaluable clinician resources such as educational handouts, lists of frequently asked questions, instruction sheets, rating scales and suggestions for additional sources of information are also included. Case studies are used throughout to illustrate the processes and techniques in their clinical context. ... Read more

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In this volume, current knowledge on light as a regulator of biological rhythms is considered from both basic science and clinical perspectives. Chapters by leading, experts cover the whole range of biological rhythms, from infradian and circadian to the longer ultradian rhythms, in a wide variety of mammalian species. The chapters on humans provide a basis on which to establish mechanisms for mediating the therapeutic and physiologically beneficial effects of light as a regulator of rhythms in health and disease. ... Read more

Customer Reviews (1)

excellent overview and treatment for this disorder
This book did an excellent job in describing the disorder and providedmany answers to everyone's question as to what they can do to helpthemselves in overcoming this disorder. it also provided information forpeople and contact sources in eachof the 50 states. definitely worthreading. ... Read more

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Discourse about the relationship between seasons and human mood has a substantial history in medicine, the arts and the social sciences . Over the last decade, this perennial topic has been dominated by the construct of Seasonal Affective Disorder (SAD). SAD is a psychiatric syndrome characterised by depressions which recur at the same time each year, typically winter (Rosenthal et al, 1984b). SAD is typically understood as the extreme end of a continuum of normative seasonal variation in mood and behaviour (seasonality). The research reported here had four interrelated aims. The first aim was to test for the existence of seasonality in human mood (as defined by SAD). It can be argued that this topic is both important and potentially fruitful. Seasonality is critical for the validation of SAD itself: it has been proposed that the most important unresolved issue of SAD research is the definition of seasonality. Furthermore, seasonality is a scientifically interesting construct, because it implies a unique trait of mood variability in the context of environmental changes.As such, the investigation of seasonality provides a test of current understandings of the relationship between personality, mood and affective vulnerability. The second aim of the research, therefore, was to situate seasonality in the nomological web of trait constructs. The third aim was to test a novel hypothesis about the psychobiology of the trait of Neuroticism, a hypothesis that derived from the integration of seasonality into the nomological net of personality constructs. The key dependent variable in the research was mood, and therefore a fourth aim was to investigate a contemporary model of mood by testing the hypothesis that a Positive Affect system is partially driven by biological rhythms. ... Read more