Season of Birth and Morningness: Comparison Between the Northern and Southern Hemispheres

Natale, Vincenzo; Milia, Lee Di

doi:10.3109/07420528.2011.589934

Cited by 45 publications

(26 citation statements)

References 16 publications

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“…Similar results concerning the eveningness among men were obtained in the studies by Adan and Natale [22] and in the Polish research [1]. Recently, the predominance of the morning chronotype in girls and women and the evening chronotype among boys and men was acknowledged by the analyses done by Natale and Di Milia [23], Randler et al [24], Borisenkov et al [25].…”

Section: Introductionsupporting

confidence: 75%

Measuring the Chronotype in Polish Population

Pracki

Wiłkość

Pracka

et al. 2014

MBS

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S u m m a r yChronotype is an attribute connected with an individual, preferred pattern of circadian activity on the continuum of morningness-eveningness. It mirrors the inter-individual differences in the course of circadian rhythms [1,2]. The studies indicate its connections with sleep-wake cycle, i.e.: time of sleep onset, wake up time and duration of sleep [3,4].Two methods of describing human chronotypes are considered in this paper: a subjective -questionnaire method and an objective method -actigraphy that measures the gross motor activity.The aim of the study was to assess the relation between results of Polish adaptation of Horne and Östberg Morningness-Eveningness Questionnaire [5] and circadian activity measured with actigraphs in order to compare and evaluate the usefulness of both methods in chronotype related studies. Also, the purpose was to assess the relation between chronotype and socio-demographic factors such as sex, age and education in Polish population.The research group included 150 healthy volunteers of genders, 75 women and 75 men. The age of the respondents fell between 19 and 60 years old (34.25±12.13 EX±SD).The obtained results confirmed the usefulness of actigraphy in chronotype related studies. Also they confirmed modulation of chronotype with age and revealed differences in circadian activity between men and women. że jest on ściśle związany z przebiegiem rytmu senczuwanie, m.in. czasem zaśnięcia i budzenia się oraz czasem trwania snu [3,4].W pracy zastosowano dwie metody pomiaru chronotypu: kwestionariuszową oraz pomiar aktograficzny aktywności ruchowej.Celem pracy była ocena związku pomiędzy wynikami polskiej adaptacji kwestionariusza Morningness-Eveningness Questionnaire (MEQ) Horna i Ostberga [5] a dobową aktywnością ruchową mierzoną aktograficznie oraz porównanie i ocena przydatności obu metod w badaniach nad chronotypem. Ponadto, dokonano oceny związku pomiędzy chronotypem i czynnikami społeczno-demograficznymi, takimi jak: płeć, wiek i wykształcenie, w populacji polskiej.Badaniami objęto grupę 150 zdrowych ochotników obu płci, 75 kobiet i 75 mężczyzn w wieku 19-60 lat (34.25±12.13; EX±SD ).Uzyskane wyniki potwierdziły przydatność aktografii w badaniach nad chronotypem. Wyniki potwierdziły związek chronotypu z wiekiem oraz ujawniły różnice w aktywności dobowej między mężczyznami i kobietami.

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Section: Introductionsupporting

confidence: 75%

Measuring the Chronotype in Polish Population

Pracki

Wiłkość

Pracka

et al. 2014

MBS

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“…The higher mood seasonality observed for individuals born in spring and summer months could thus be explained on the basis of this higher adaptation cost. This higher adaptation cost is also observed by the higher mood seasonality detected in evening‐type individuals, more frequently born during spring–summer months (increasing and long photoperiod, respectively) …”

mentioning

confidence: 64%

“…This higher adaptation cost is also observed by the higher mood seasonality detected in evening-type individuals, 12,13 more frequently born during springsummer months (increasing and long photoperiod, respectively). 14,15 From an experimental point of view, testing the role of the photoperiod-at-birth hypothesis in humans is difficult. A possible way to test this hypothesis is to compare the month-of-birth effect on mood seasonality in individuals born in the northern and southern hemispheres.…”

mentioning

confidence: 99%

Month of birth and mood seasonality: A comparison between countries in the northern and southern hemispheres

Tonetti

Milfont

Tilyard

et al. 2013

Psychiatry Clin Neurosci

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Aims A previous study has reported a significant month‐of‐birth effect on mood seasonality in the northern hemisphere. Higher mood seasonality was observed for university students born during spring or summer months (long photoperiod) compared to those born during autumn or winter months (short photoperiod). The aim of this study was to test the hypothesized photoperiod effect by comparing the correlation between month of birth and mood seasonality in two countries located at the opposite poles of the terrestrial globe: Italy (northern hemisphere) and New Zealand (southern hemisphere). On the basis of the photoperiod‐at‐birth hypothesis, we expected to find higher mood seasonality among individuals born in months with longer photoperiods in both countries. Methods The Seasonal Pattern Assessment Questionnaire was administered to 1514 young adults (1088 women, 426 men; 1027 Italians, 487 New Zealanders), with ages ranging from 18 to 34 years. The Global Seasonality Score, which is a measure of mood seasonality, was calculated from the Seasonal Pattern Assessment Questionnaire. Results A significant overall month‐of‐birth effect was observed on the Global Seasonality Score, but only for men. Men born in April and August (corresponding in Italy to a long photoperiod, in New Zealand to a short photoperiod) had higher mood seasonality than those born in February, regardless of country. Conclusions A significant month‐of‐birth effect was found on mood seasonality, but results do not support the hypothesis based on the photoperiod effect.

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“…For instance, 24/7 lighting in Neonatal Intensive Care Units decreases weight gain in babies born prematurely, increases latency to discharge from the hospital, and delays the timing of sleep:wake rhythm consolidation (Brandon, Holditch‐Davis, & Belyea, ; Mann, Haddow, Stokes, Goodley, & Rutter, ; Vasquez‐Ruiz, et al, ). In addition, season of birth is associated with individual differences in chronotype (Mongrain, Paquet, & Dumont, ; Natale & Di Milia, ), which can increase the risk of developing metabolic and mood disorders in adulthood (Erren, Koch, Gross, Reiter, & Meyer‐Rochow, ; Merikanto et al, ; Tonetti, Fabbri, Martoni, & Natale, ; Yu et al, ). These studies indicate that the circadian system is sensitive during the perinatal period, and underscore the importance of understanding how development of the circadian system affects its operation in adulthood.…”

Section: Introductionmentioning

confidence: 99%

Circuit development in the master clock network of mammals

Carmona‐Alcocer

Rohr

Joye

et al. 2018

Eur J of Neuroscience

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Daily rhythms are generated by the circadian timekeeping system, which is orchestrated by the master circadian clock in the suprachiasmatic nucleus (SCN) of mammals. Circadian timekeeping is endogenous and does not require exposure to external cues during development. Nevertheless, the circadian system is not fully formed at birth in many mammalian species and it is important to understand how SCN development can affect the function of the circadian system in adulthood. The purpose of the current review is to discuss the ontogeny of cellular and circuit function in the SCN, with a focus on work performed in model rodent species (i.e., mouse, rat, and hamster). Particular emphasis is placed on the spatial and temporal patterns of SCN development that may contribute to the function of the master clock during adulthood. Additional work aimed at decoding the mechanisms that guide circadian development is expected to provide a solid foundation upon which to better understand the sources and factors contributing to aberrant maturation of clock function.

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Season of Birth and Morningness: Comparison Between the Northern and Southern Hemispheres

Cited by 45 publications

References 16 publications

Measuring the Chronotype in Polish Population

Measuring the Chronotype in Polish Population

Month of birth and mood seasonality: A comparison between countries in the northern and southern hemispheres

Circuit development in the master clock network of mammals

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