Results 261 to 270 of about 410,908 (314)
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Sexually Antagonistic Variation and the Evolution of Dimorphic Sexual Systems
The American Naturalist, 2019Multicellular Eukaryotes use a broad spectrum of sexual reproduction strategies, ranging from simultaneous hermaphroditism to complete dioecy (separate sexes). The evolutionary pathway from hermaphroditism to dioecy involves the spread of sterility alleles that eliminate female or male reproductive functions, producing unisexual individuals.
Colin, Olito, Tim, Connallon
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Sexual differentiation of the central nervous system
Science, 1981Sexual differentiation of reproductive and behavior patterns is largely effected by hormones produced by the gonads. In many higher vertebrates, an integral part of this process is the induction of permanent and essentially irreversible sex differences in central nervous function, in response to gonadal hormones secreted early in development.
N J, MacLusky, F, Naftolin
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Sexual Dimorphism in the Immune System
2014Sexual dimorphism is the term that refers to differences between males and females of the same species and is most obvious as differences in external appearances. However, there can also be sexual dimorphism of internal organs and biological functions, including the immune system.
McCombe, Pamela A., Greer, Judith M.
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Journal of Sex & Marital Therapy, 1994
This paper reports on the development, reliability, and validity of a new self-report instrument: the Sexual Interaction System Scale (SISS). Initial research on 143 couples supports reliability as measured by the internal consistency of the five factors.
J D, Woody, H J, D'Souza
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This paper reports on the development, reliability, and validity of a new self-report instrument: the Sexual Interaction System Scale (SISS). Initial research on 143 couples supports reliability as measured by the internal consistency of the five factors.
J D, Woody, H J, D'Souza
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Sexual dimorphism in the vomeronasal system of the rabbit
Brain Research, 2006Studies have shown that the vomeronasal system (VNS), an olfactory neural network that participates in the control of reproductive physiology and behavior, is sexually dimorphic in the rat. These works have also shown two main characteristics of brain sexual dimorphism: (a) dimorphism appears in neural networks related to reproduction and (b) it can ...
Santiago, Segovia +8 more
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Sexual Impotence and the Limbic System
British Journal of Psychiatry, 1965Seventy-six male patients referred to the Maudsley Hospital with a primary complaint of impaired sexual potency were studied in order to define the natural history of these conditions (to be reported). Two of the patients who complained of impotence were found to have intracerebral tumours. In the first case the tumour was limited to the temporal lobe:
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Sexual differentiation of the vertebrate nervous system
Nature Neuroscience, 2004Understanding the mechanisms that give rise to sex differences in the behavior of nonhuman animals may contribute to the understanding of sex differences in humans. In vertebrate model systems, a single factor-the steroid hormone testosterone-accounts for most, and perhaps all, of the known sex differences in neural structure and behavior.
John A, Morris +2 more
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PROTEOLYTIC ENZYME SYSTEM IN SEXUAL DEVIATES
Archives of Neurology And Psychiatry, 1954AS PART of a research program on sexual deviation,* a comparative study of several biochemical measures was made in an attempt to define or differentiate subgroups within a total population of hospitalized male sex offenders. This paper reports the results obtained with one of these measures, a compound or compounds present in blood sera which can be ...
J T, MARSH, J, HILLIARD, R, LIECHTI
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