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Seasonal depression

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https://www.readbyqxmd.com/read/29024857/controlled-trial-evaluation-of-exposure-duration-to-negative-air-ions-for-the-treatment-of-seasonal-affective-disorder
#1
Bonnie Bowers, Randall Flory, Joseph Ametepe, Lauren Staley, Anne Patrick, Heather Carrington
This study evaluated the effectiveness of 30 or 60min of daily exposure to high-density or to zero-density (placebo condition) negative air ions over 18 days on the symptoms of seasonal affective disorder (SAD) in 40 participants under controlled laboratory conditions. Exposure to high-density negative air ions was superior to zero-density negative air ions in alleviating depression and the atypical symptoms of SAD. Also, more subjects in the high-density negative air ions groups met two different clinical response criteria than did those in the zero-density groups...
August 19, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/29023516/hypothalamic-control-systems-show-differential-gene-expression-during-spontaneous-daily-torpor-and-fasting-induced-torpor-in-the-djungarian-hamster-phodopus-sungorus
#2
Ceyda Cubuk, Hanna Markowsky, Annika Herwig
Djungarian hamsters are able to use spontaneous daily torpor (SDT) during the winter season as well as fasting-induced torpor (FIT) at any time of the year to cope with energetically challenging environmental conditions. Torpor is a state of severely reduced metabolism with a pronounced decrease in body temperature, which enables animals to decrease their individual energy requirements. Despite sharing common characteristics, such as reduced body mass before first torpor expression and depressed metabolism and body temperature during the torpid state, FIT and SDT differ in several physiological properties including torpor bout duration, minimal body temperature, fuel utilization and circadian organization...
2017: PloS One
https://www.readbyqxmd.com/read/28984598/vitamin-d-and-the-risk-of-dementia-the%C3%A2-rotterdam-study
#3
Silvan Licher, Renée F A G de Bruijn, Frank J Wolters, M Carola Zillikens, M Arfan Ikram, M Kamran Ikram
BACKGROUND: Vitamin D has gained interest as a potentially modifiable risk factor for dementia because of its putative neuroprotective effects. However, longitudinal studies examining the association between vitamin D and dementia have provided inconsistent results. OBJECTIVE: To determine the relationship of serum vitamin D with prevalent and incident dementia in the general population. METHODS: Within the prospective Rotterdam Study, we measured serum 25-hydroxyvitamin D concentrations between 1997 and 2001 using electrochemiluminescence-immunoassay in 6220 participants 55 years or older...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28982071/toxicological-effects-of-paracetamol-on-the-clam-ruditapes-philippinarum-exposure-vs-recovery
#4
Bruno Nunes, Joana Nunes, Amadeu M V M Soares, Etelvina Figueira, Rosa Freitas
Exposure of wild organisms to anthropogenic substances never follows a definite time-course and pulsed events can often determine biological responses to such chemicals, confounding the interpretation of toxicological data. This is the case of specific chemicals such as pharmaceutical drugs, which are commonly released by sewage systems into sensitive areas, including estuaries. The presence and amount of these chemicals in the wild can be modulated by events such as dilution due to heavy rain, floods, or by varying patterns of domestic water use (daily vs...
September 20, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28965814/associations-of-depression-and-seasonality-with-morning-evening-preference-comparison-of-contributions-of-its-morning-and-evening-components
#5
Arcady A Putilov
Despite predominance of positive findings on associations of morning-evening preference with seasonality and depression, it remains to be clarified whether morning and evening components of this preference equally contribute to these associations and whether these associations persist after accounting for confounding variables. Data on retrospectively reported seasonal changes in well-being, mood, and behaviors were collected from 2398 residents of West Siberia, South and North Yakutia, Chukotka, Alaska, and Turkmenistan...
September 25, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28921779/local-pre-adaptation-to-disturbance-and-inbreeding-environment-interactions-affect-colonization-abilities-of-diploid-and-tetraploid-centaurea-stoebe
#6
Christoph Rosche, Isabell Hensen, Susanne Lachmuth
Primary colonization in invasive ranges most commonly occurs in disturbed habitats, where anthropogenic disturbance may cause physical damage in plants. The tolerance to such damage may differ between cytotypes and among populations as a result of differing population histories (adaptive differentiation between ruderal vs. natural habitats). Moreover, founder populations often experience inbreeding depression, the effects of which may increase through physical damage due to inbreeding-environment interactions...
September 18, 2017: Plant Biology
https://www.readbyqxmd.com/read/28912725/enhanced-strength-and-sprint-levels-and-changes-in-blood-parameters-during-a-complete-athletics-season-in-800-m-high-level-athletes
#7
Beatriz Bachero-Mena, Fernando Pareja-Blanco, Juan J González-Badillo
The purpose of this study was to analyze changes in sprint, strength, hematological, and hormonal parameters in high-level 800 m athletes during a complete athletics season. Thirteen male athletes of national and international level in 800 m (personal best ranging from 1:43 to 1:58 min:ss) participated in this study. A total of 5 tests were conducted during a complete athletics season. Athletes performed sprint tests (20 and 200 m), countermovement jump (CMJ), jump squat (JS), and full squat (SQ) tests. Blood samples (red and white blood profile) and hormones were collected in test 1 (T1), test 3 (T3), and test 5 (T5)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28904813/seasonal-affective-disorder-and-non-seasonal-affective-disorders-results-from-the-nesda-study
#8
Wim H Winthorst, Annelieke M Roest, Elisabeth H Bos, Ybe Meesters, Brenda W J H Penninx, Willem A Nolen, Peter de Jonge
BACKGROUND: Seasonal affective disorder (SAD) is considered to be a subtype of depression. AIMS: To compare the clinical picture of SAD to non-seasonal affective disorders (non-SADs). METHOD: Diagnoses according to the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) were established in 2185 participants of the Netherlands Study of Depression and Anxiety. The Seasonal Pattern Assessment Questionnaire was administered to diagnose SAD...
July 2017: BJPsych Open
https://www.readbyqxmd.com/read/28901656/the-effects-of-seasonal-affective-disorder-and-alcohol-abuse-on-sleep-and-snoring-functions-in-a-population-based-study-in-finland
#9
Isabel Morales-Muñoz, Seppo Koskinen, Timo Partonen
Seasonal affective disorder (SAD) is a recurrent depressive disorder with a seasonal pattern. In addition to some specific symptoms such as sad mood, low energy or carbohydrate craving, this mood disorder is also characterized by the presence of sleeping problems and alcohol disorders. Interestingly, there is a strong link between alcohol use and sleeping deficits. Although previous studies have focused extensively on the sleep patterns in SAD patients and patients with alcohol use disorder (AUD), no research has yet been conducted on subjects with comorbid SAD and AUD...
September 13, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28894915/chronobiological-theories-of-mood-disorder
#10
Nevin F W Zaki, David Warren Spence, Ahmed S BaHammam, Seithikurippu R Pandi-Perumal, Daniel P Cardinali, Gregory M Brown
Major depressive disorder (MDD) remains the most prevalent mental disorder and a leading cause of disability, affecting approximately 100 million adults worldwide. The disorder is characterized by a constellation of symptoms affecting mood, anxiety, neurochemical balance, sleep patterns, and circadian and/or seasonal rhythm entrainment. However, the mechanisms underlying the association between chronobiological parameters and depression remain unknown. A PubMed search was conducted to review articles from 1979 to the present, using the following search terms: "chronobiology," "mood," "sleep," and "circadian rhythms...
September 11, 2017: European Archives of Psychiatry and Clinical Neuroscience
https://www.readbyqxmd.com/read/28873422/evaluating-multiple-causes-of-persistent-low-microwave-backscatter-from-amazon-forests-after-the-2005-drought
#11
Steve Frolking, Stephen Hagen, Bobby Braswell, Tom Milliman, Christina Herrick, Seth Peterson, Dar Roberts, Michael Keller, Michael Palace
Amazonia has experienced large-scale regional droughts that affect forest productivity and biomass stocks. Space-borne remote sensing provides basin-wide data on impacts of meteorological anomalies, an important complement to relatively limited ground observations across the Amazon's vast and remote humid tropical forests. Morning overpass QuikScat Ku-band microwave backscatter from the forest canopy was anomalously low during the 2005 drought, relative to the full instrument record of 1999-2009, and low morning backscatter persisted for 2006-2009, after which the instrument failed...
2017: PloS One
https://www.readbyqxmd.com/read/28871848/personality-characteristics-and-individual-factors-associated-with-ptsd-in-firefighters-one-month-after-extended-wildfires
#12
Constantin Psarros, Christos Theleritis, Nikolaos Kokras, Dimitris Lyrakos, Angelos Koborozos, Olga Kakabakou, Georgios Tzanoulinos, Panagiota Katsiki, Joanna Despoina Bergiannaki
BACKGROUND: Firefighters participate in activities with intense physical and psychological stress and are constantly at risk to develop various psychopathological reactions. AIMS: To investigate psychological reactions in firefighters one month after devastating wildfires in Greece, during August 2007, which lead to the devastation of large areas and the death of 43 people among whom three were firefighters. METHODS: One month after the wildfires, a joint task force of mental health clinicians was organized in order to provide psychological support and to investigate the psychological consequences of wildfires to firefighters...
September 5, 2017: Nordic Journal of Psychiatry
https://www.readbyqxmd.com/read/28869909/dietary-patterns-and-depressive-symptoms-during-pregnancy-in-japan-baseline-data-from-the-kyushu-okinawa-maternal-and-child-health-study
#13
Yoshihiro Miyake, Keiko Tanaka, Hitomi Okubo, Satoshi Sasaki, Shinya Furukawa, Masashi Arakawa
BACKGROUND: Only one Brazilian study has examined the association between dietary patterns and depressive symptoms during pregnancy. The current cross-sectional study examined this issue in Japan. METHODS: Study subjects were 1744 pregnant women. Between April 2007 and March 2008, information under study was obtained. Dietary patterns were derived from a factor analysis of 33 predefined food groups based on a self-administered diet history questionnaire. Depressive symptoms were defined as a Center for Epidemiological Studies Depression Scale score ≥ 16...
January 1, 2018: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28860482/circadian-clock-model-supports-molecular-link-between-per3-and-human-anxiety
#14
Amanda R Liberman, Soo Bin Kwon, Ha T Vu, Allan Filipowicz, Ahmet Ay, Krista K Ingram
Generalized anxiety and major depression have become increasingly common in the United States, affecting 18.6 percent of the adult population. Mood disorders can be debilitating, and are often correlated with poor general health, life dissatisfaction, and the need for disability benefits due to inability to work. Recent evidence suggests that some mood disorders have a circadian component, and disruptions in circadian rhythms may even trigger the development of these disorders. However, the molecular mechanisms of this interaction are not well understood...
August 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28856679/prevalence-and-determinants-of-seborrheic-dermatitis-in-a-middle-aged-and-elderly-population-the-rotterdam-study
#15
M G H Sanders, L M Pardo, O H Franco, R S Ginger, T Nijsten
BACKGROUND: Seborrheic dermatitis is a chronic relapsing inflammatory skin disease with unclear pathophysiological mechanisms. OBJECTIVE: To establish which lifestyle and physiological determinants are associated with seborrheic dermatitis. METHODS: Seborrheic dermatitis was diagnosed by a trained physician during a full body skin examination within the Rotterdam Study, a prospective population-based cohort study in middle aged and elderly...
August 30, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28843080/association-between-hypovitaminosis-d-and-cognitive-inhibition-impairment-during-major-depression-episode
#16
R Belzeaux, C Annweiler, J A Bertrand, O Beauchet, S Pichet, F Jollant, G Turecki, S Richard-Devantoy
BACKGROUND: Major depressive episode (MDE) has been associated with cognitive functioning alteration and hypovitaminosis D (hypoVD), but the relationship between hypoVD, depression, and cognition is not well understood. We aimed to compare patient with MDE with or without hypoVD in regard of cognitive functioning. METHODS: 91 patients (38.5 years old, 65.9% female) with MDE were included in a cross-sectional study and were evaluated with a complete cognitive battery...
January 1, 2018: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28795636/athletic-identity-and-psychiatric-symptoms-following-retirement-from-varsity-sports
#17
Zarina A Giannone, Colleen J Haney, David Kealy, John S Ogrodniczuk
BACKGROUND: Despite evidence identifying adjustment difficulties among retiring athletes, research investigating factors that contribute to post-retirement complications is limited. Athletic identity may be an important determinant of adverse adaptation to sport retirement. AIMS: The purpose of this study was to address the influence of athletic identity on post-retirement depression and anxiety symptoms among varsity athletes. METHOD: An anonymous, online survey regarding athletic identity and psychiatric symptoms was completed by 72 self-identified varsity athletes during their final season of competition and 3 months after retiring from sport...
August 1, 2017: International Journal of Social Psychiatry
https://www.readbyqxmd.com/read/28789727/food-based-diet-quality-score-in-relation-to-depressive-symptoms-in-young-and-middle-aged-japanese-women
#18
Hiroka Sakai, Kentaro Murakami, Satomi Kobayashi, Hitomi Suga, Satoshi Sasaki
Only a few studies have focused on the association between overall diet, rather than intakes of individual nutrients or foods, and depressive symptoms in Japanese. This cross-sectional study examined associations between a diet quality score and depressive symptoms in 3963 young (age 18 years) and 3833 middle-aged (mean age 47·9 (sd 4·2) years) Japanese women. Dietary information was collected using a diet history questionnaire. A previously developed diet quality score was computed mainly based on the Japanese Food Guide Spinning Top...
June 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28780278/season-independent-cognitive-deficits-in-seasonal-affective-disorder-and-their-relation-to-depressive-symptoms
#19
Liv Vadskjær Hjordt, Dea Siggaard Stenbæk, Brice Ozenne, Brenda Mc Mahon, Ida Hageman, Steen Gregers Hasselbalch, Gitte Moos Knudsen
Although cognitive impairments are common in depressed individuals, it is unclear which aspects of cognition are affected and whether they represent state or trait features of depression. We here exploited a naturalistic model, namely the seasonal fluctuations in depressed status in individuals with Seasonal Affective Disorder (SAD), to study depression-related cognition, longitudinally. Twenty-nine medication-free individuals diagnosed with winter-SAD and 30 demographically matched healthy controls with no seasonality symptoms completed the Letter-number Sequencing task (LNS), the Symbol Digit Modalities Test (SDMT) and the Simple Reaction Time (SRT) twice; in summer and in winter...
July 30, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28774755/human-seasonal-and-circadian-studies-in-antarctica-halley-75%C3%A2-s
#20
Josephine Arendt, Benita Middleton
Living for extended periods in Antarctica exposes base personnel to extremes of daylength (photoperiod) and temperature. At the British Antarctic Survey base of Halley, 75°S, the sun does not rise for 110d in the winter and does not set for 100d in summer. Photoperiod is the major time cue governing the timing of seasonal events such as reproduction in many species. The neuroendocrine signal providing photoperiodic information to body physiology is the duration of melatonin secretion which reflects the length of the night: longer in the short days of winter and shorter in summer...
August 1, 2017: General and Comparative Endocrinology
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