Sökning: "Torbjörn Bäckström"

Visar resultat 11 - 15 av 18 avhandlingar innehållade orden Torbjörn Bäckström.

  1. 11. Hormones, Mood and Cognition

    Författare :Kristiina Kask; Inger Sundström Poromaa; Torbjörn Bäckström; Britth-Marie Landgren; Uppsala universitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; startle response; prepulse inhibition; premenstrual dysphoric disorder; menstrual cycle; pregnancy; postpartum period; episodic memory; semantic memory; working memory; progesterone; estradiol; allopregnanolone.; Obstetrics and gynaecology; Obstetrik och gynekologi;

    Sammanfattning : Ovarian steroid hormones are neuroactive steroids with widespread actions in the brain, and are thus able to influence mood, behavior and cognition. In this thesis the effects of progesterone withdrawal and the direct effects of the progesterone metabolite allopregnanolone are evaluated. LÄS MER

  3. 12. Nutritional aspects of behaviour and biology during pregnancy and postpartum

    Författare :Anette Lundqvist; Herbert Sandström; Katarina Hamberg; Torbjörn Bäckström; Johan Hultdin; Margareta Larsson; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; pregnancy; antenatal care; dietary advice; qualitative; dietary intake; cross-sectional; vitamin D levels; alloprenanolone; weight gain; longitudinal; Clinical Chemistry; klinisk kemi;

    Sammanfattning : BackgroundA well-balanced nutritious diet is important for the pregnant woman and the growing fetus, as well as for their future health. Poor nutrition results from both over-consumption of energy-rich foods which can lead to a higher weight gain than is healthy and under-nutrition of essential nutrients. LÄS MER

  4. 13. Behavioral effects of female sex steroid hormones : models of PMS and PMDD in Wistar rats

    Författare :Magnus Löfgren; Torbjörn Bäckström; Inga-Maj Johansson; Per Södersten; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; PMS; PMDD; rats; progesterone; estradiol; behavior; individual response; stress interaction; tolerance; withdrawal; learning and memory; anxiety.; Biological research on drug dependence; Biologisk beroendeforskning; Endocrinology; Endokrinologi; Obstetrics and gynaecology; Obstetrik och gynekologi; Pharmacological research; Farmakologisk forskning; Obstetrics and gynaecology; Obstetrik och gynekologi; Psychology; Psykologi; obstetrik och gynekologi; Obstetrics and Gynaecology;

    Sammanfattning : Background Animal models can be used to mimic human conditions of psychopathology, and also as pre-clinical models to evaluate candidate drugs. With hormonal treatment it is possible to produce behavior in the rat which corresponds to the mental symptoms of pre-menstrual syndrome (PMS), and pre-menstrual dysphoric disorder (PMDD). LÄS MER

  5. 14. The dose-dependent effects of estrogens on ischemic stroke

    Författare :Jakob Ström; Annette Theodorsson; Elvar Theodorsson; Mats Hammar; Torbjörn Bäckström; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Estrogens are a group of female sex hormones that in addition to central roles in reproductive functions also have profound impact on for example brain development, blood vessels, bone tissue, metabolism and the immune system. The dominant endogenous production sites for estrogens in females are the ovaries and adipose tissue, while exogenous sources include combined contraceptive hormone treatments and menopausal hormone therapy. LÄS MER

  7. 15. Sex and stress steroid modulation of GABA mediated chloride ion flux in rat CNS

    Författare :Jessica Strömberg; Per Lundgren; Torbjörn Bäckström; David Haage; Esa Korpi; Umeå universitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; allopregnanolone; chloride ion uptake; patch-clamp; 3beta-steroids; kinetic parameters; rat brain; Obstetrics and gynaecology; Obstetrik och gynekologi;

    Sammanfattning : Background: Sex and stress steroids are metabolized to 3a-hydroxy-pregnane-steroid metabolites such as allopregnanolone (Allo) and tetrahydrodeoxycorticosterone (THDOC). Allo and THDOC are neuroactive steroids that are metabolized in the brain and act in brain as potent positive GABAA receptor function modulators. LÄS MER