tailieunhanh - Báo cáo y học: "Development of daily rhythmicity in heart rate and locomotor activity in the human fetus"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Wertheim cung cấp cho các bạn kiến thức về ngành y đề tài: Development of daily rhythmicity in heart rate and locomotor activity in the human fetus. | Journal of Circadian Rhythms BioMed Central Research Open Access Development of daily rhythmicity in heart rate and locomotor activity in the human fetus Paliko I Kintraia Medea G Zarnadze Nicolas P Kintraia and la G Kashakashvili Address . Chachava Institute of Perinatalogy Obstetrics and Gynecology 38 Kostava Str. Tbilisi 0108 Republic of Georgia Email Paliko I Kintraia - paliko@ Medea G Zarnadze - mgz13@ Nicolas P Kintraia - info@ Ia G Kashakashvili - info@ Corresponding author Published 31 March 2005 Received 04 January 2005 Accepted 31 March 2005 Journal of Circadian Rhythms 2005 3 5 doi 1740-3391-3-5 This article is available from http content 3 1 5 2005 Kintraia et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background Very little is known about the perinatal genesis of circadian rhythmicity in the human fetus. Some researchers have found evidence of rhythmicity early on in fetal development whereas others have observed a slow development of rhythmicity during several years after birth. Method Rhythms of fetal heartbeat and locomotor activity were studied in women with physiological course of pregnancy at 16 to 40 gestational weeks. Observations were conducted continuously for 24 h using the method of external electrocardiography which provided simultaneous detection of the changes in maternal and fetal heartbeat as well as assessment of daily locomotor activity of the fetus. During the night-time electroencephalogram myogram oculogram and respiration of the mother were registered in parallel with fetal external electrocardiography. Results Although we found no significant daily rhythmicity in heart rate per se in