72877775-e37b-4593-9279-6043283fd263 eng utf8 dataset pointOfContact National Centre for Polar and Ocean Research (NCPOR) +91-832-2525515 voice Headland Sada, Vasco da Gama, Goa 403804 Vasco-da-Gama Goa 403804 IND vssamy@ncpor.res.in Mr. Sakthivel Samy V 2020-12-11T00:00:00 creation ISO 19115-1 Geographic information - Metadata - Part 1: Fundamentals ISO 19115-1:2014 Sleep Studies of Summer Members in Antarctica Cardiovascular Responses. 2020-09-15T00:00:00 creation Document digital Six summer and four wintering members of Indian Antarctic expedition underwent heart rate (HR) and galvanic skin resistance (GSR) recordings during sleep. A total of three night recordings were performed on each subject at three different sessions during the period of four months of austral summer. As the subjects slept in the laboratory, they showed disturbance in sleep pattern. In all the subjects during summer, the sleep bradycardia increased with absence of periodic fluctuations of HR indicative of temporary loss of REM sleep. The subjects tended to show increase in slow wave sleep during summer. The winterover subjects showed disturbed sleep variables which was not related to HR and GSR changes during sleep. However, due to the limited number of subjects no affirmative answer could be made to prove relationship of sleep disturbance with prolonged daylight or psychological reaction with prolonged isolation. Stable temporal organization of human physiology and psychology is achieved through synchronization of underlying circadian pacemakers to a 24 h period primarily by appropriate light - dark cycle. The polar region provides an excellent laboratory for studying the human circadian rhythms. There is evidence that Antarctic expedition members frequently complain of insomnia, and this has been linked to polar nights and homesickness (Bogolovaskii,1974 and Natani et al.,1970). The Antarctic sleep studies have been conducted by various workers like Bogolovaskii (1974), Gander et al.(1991) and Natani et al.(1970), particularly on subjects overwintering, indicating sleep disruption, suppression of delta sleep and diminution of paradoxical sleep during polar night by polysomnographic recordings (Joren et al.,1970 and Buguetetal.,1987). completed principalInvestigator National Centre for Polar and Ocean Research (NCPOR) 8322525515 voice Headland Sada, Vasco da Gama, Goa 403804 Vasco-da-Gama Goa 403804 IND ictd@ncpor.res.in Dr. B Chhajer health 20.0 140.0 -90.0 30.0 1991-01-01 1992-12-31 Earth Science-Human Dimensions Theme Maitri Antarctic Place Sleep Studies of Summer Members in Antarctica Cardiovascular Responses Project eng TableDigital unknown unknown unknown distributor National Centre for Polar and Ocean Research (NCPOR) +91-832-2525515 voice Headland Sada, Vasco da Gama, Goa 403804 Vasco-da-Gama Goa 403804 IND vssamy@ncpor.res.in Mr. Sakthivel Samy V http://npdc.ncaor.gov.in/npdc/search_mf_data.action?search=freeText&expedition_type=all&parameter=MF-704383166&userType=user&freeTextValue=Sleep+Studies+of+Summer+Members+in+Antarctica+%3A+Cardiovascular+Responses.