Summary
Some of the components of the system that controls the function of the testes of the Japanese quail were identified by means of midline or bilateral electrolytic or radio-frequency coagulation of various regions of the hypothalamus. The destruction of two identifiable regions of the ventral hypothalamus resulted in different forms of testicular dysfunction. Extensive medial or bilateral damage to the infundibular nuclear complex, ventral regions thereof (including the tuberal nuclei), the entire median eminence or its posterior division resulted in regression of both the gametogenic and endocrine components of the testis and regression of the cloacal gland, an anal gland known to depend on testosterone for normal function. Damage to more anterodorsal regions of the infundibular nuclear complex resulted, in a single bird, in regression of the seminiferous tubules, but had no noticeable effect on the cells of Leydig; the cloacal gland of this bird, although reduced somewhat in size, appeared histologically active. Unilateral damage to the infundibular nuclear complex or the median eminence, or bilateral destruction of the antero—or posteroventral portions of the infundibular nuclear complex did not affect testicular function. The differing testicular dysfunctions are discussed in relation to the release of LH and FSH from the adenohypophysis.
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This investigation was supported by NIH Predoctoral Fellowship GM-33,458 to the author, and by Research Grants from the National Science Foundation (GB-11905) and the National Institutes of Health (NB-06187) to Professor Donald S. Farner. This paper is based on a dissertation (Stetson, 1971b) submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Zoology at the University of Washington. The hormones used in this investigation were generously supplied by the Endocrinology Study Section of the National Institutes of Health.
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Stetson, M.H. Hypothalamic regulation of testicular function in Japanese quail. Z.Zellforsch 130, 389–410 (1972). https://doi.org/10.1007/BF00306951
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DOI: https://doi.org/10.1007/BF00306951