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[Photoperiodism and brain strokes in years with low and high solar activity].
Klin Med (Mosk). 2005; 83(5):29-33.KM

Abstract

The paper demonstrates substantial (p = 0.95) increase of brain stroke (BS) rate during daylight hours, compared with that in the night-time hours. Such pattern is observed in accordance with astronomic seasons, half-year and year intervals: 1996 was a year with low solar activity (YLSA), 2000--a year with high solar activity (YHSA). Between the seasons "morning" and "day" during daylight hours and the seasons "night" and "day" in the night-time hours in YLSA the study revealed two biological turning-points, depending on the natural day length. In YHSA BS rate was the same in different seasons both during daylight hours and in the night-time hours. The variation of the BS rate within 24-hour time intervals demonstrates that the reference rate of Smolensk inhabitants for BS is season-dependent in YLSA, in comparison with that in YHSA; it is the highest in the seasons "morning" and "night" and the lowest in the seasons "evening "and "day". There is a weak correlation between BS rate and the physical phenomena under study (light and darkness). The results demonstrate possible direct biotropic effect of the light--darkness shift on BS rate in YLSA.

Authors

Kornilova LS
No affiliation info available
Platonov IG
No affiliation info available
Zhuk EG
No affiliation info available

MeSH

Adaptation, PhysiologicalAdultAge FactorsAgedCircadian RhythmFemaleFollow-Up StudiesHumansIncidenceMaleMiddle AgedPhotoperiodRetrospective StudiesRussiaSeasonsSex FactorsSolar ActivityStroke

Pub Type(s)

Comparative Study
English Abstract
Journal Article

Language

rus

PubMed ID

15984579

Citation

Kornilova, L S., et al. "[Photoperiodism and Brain Strokes in Years With Low and High Solar Activity]." Klinicheskaia Meditsina, vol. 83, no. 5, 2005, pp. 29-33.
Kornilova LS, Platonov IG, Zhuk EG. [Photoperiodism and brain strokes in years with low and high solar activity]. Klin Med (Mosk). 2005;83(5):29-33.
Kornilova, L. S., Platonov, I. G., & Zhuk, E. G. (2005). [Photoperiodism and brain strokes in years with low and high solar activity]. Klinicheskaia Meditsina, 83(5), 29-33.
Kornilova LS, Platonov IG, Zhuk EG. [Photoperiodism and Brain Strokes in Years With Low and High Solar Activity]. Klin Med (Mosk). 2005;83(5):29-33. PubMed PMID: 15984579.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Photoperiodism and brain strokes in years with low and high solar activity]. AU - Kornilova,L S, AU - Platonov,I G, AU - Zhuk,E G, PY - 2005/6/30/pubmed PY - 2005/8/19/medline PY - 2005/6/30/entrez SP - 29 EP - 33 JF - Klinicheskaia meditsina JO - Klin Med (Mosk) VL - 83 IS - 5 N2 - The paper demonstrates substantial (p = 0.95) increase of brain stroke (BS) rate during daylight hours, compared with that in the night-time hours. Such pattern is observed in accordance with astronomic seasons, half-year and year intervals: 1996 was a year with low solar activity (YLSA), 2000--a year with high solar activity (YHSA). Between the seasons "morning" and "day" during daylight hours and the seasons "night" and "day" in the night-time hours in YLSA the study revealed two biological turning-points, depending on the natural day length. In YHSA BS rate was the same in different seasons both during daylight hours and in the night-time hours. The variation of the BS rate within 24-hour time intervals demonstrates that the reference rate of Smolensk inhabitants for BS is season-dependent in YLSA, in comparison with that in YHSA; it is the highest in the seasons "morning" and "night" and the lowest in the seasons "evening "and "day". There is a weak correlation between BS rate and the physical phenomena under study (light and darkness). The results demonstrate possible direct biotropic effect of the light--darkness shift on BS rate in YLSA. SN - 0023-2149 UR - https://www.unboundmedicine.com/medline/citation/15984579/[Photoperiodism_and_brain_strokes_in_years_with_low_and_high_solar_activity]_ DB - PRIME DP - Unbound Medicine ER -