Sexual dimorphic nucleus

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Use the link below to share a full-text version of this article with your friends and colleagues. Learn more. The volume of an intensely staining component of the preoptic area of the male rat is markedly larger than that of the female.

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Lower spinal cord injuries frequently cause sexual dysfunction in men, including erectile dysfunction and an ejaculation disorder. This indicates that the important neural centers for male sexual function are located within the lower spinal cord. It is interesting that the lumbar spinal segments contain several neural circuits, showing a clear sexually dimorphism that, in association with neural circuits of the thoracic and sacral spinal cord, are critical in expressing penile reflexes during sexual behavior.

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The AGD was measured in females on the day of birth, and 0. The results indicate that the individual effects of the postnatal environment depend on the androgenicity of the intrauterine microenvironment. Further, variations in the individual's response to potential environmental hazards may be predicted by antecedent intrauterine events.

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Please take this quick survey to tell us about what happens after you publish a paper. Biology of Sex Differences. DecemberCite as.

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Skip to search form Skip to main content. A sexually dimorphic nucleus in the human brain. Morphometric analysis revealed that the volume of this nucleus is 2.

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The sexually dimorphic nucleus SDN is an ovoid, densely packed cluster of large cells located in the medial preoptic area POA of the hypothalamus which is believed to be related to sexual behavior in animals. Thus far, for all species of mammals investigated, the SDN has been repeatedly found to be considerably larger in males than in females. In humans, the volume of the SDN has been found to be 2.

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A sexually dimorphic nucleus in the quail preoptic area. Neuroscience Letters, 64 2 The cytoarchitectural analysis of the preoptic-anterior hypothalamic region of the Japanese quail reveals a sexual dimorphism in the total volume of the medial preoptic nucleus significantly larger in males than in females. Different nuclei of the region dorsal preopticus, suprachiasmaticus do not show any statistically significant difference.

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The sexually dimorphic nucleus of the preoptic area SDN-POA in the human hypothalamus is an ovoid, densely packed collection of large cells. The size, shape and cellular morphology of the SDN-POA was examined in relation to sex and age in adult human subjects. In this region the following parameters were measured: length of the rostrocaudal axis, maximum cross-sectional area, volume, numerical cell density, total number of cells, and the diameter of the cell nucleus.

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Charles E. Roselli, Kay Larkin, John A. Resko, John N. Sheep are one of the few animal models in which natural variations in male sexual preferences have been studied experimentally.

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