Learn More
Rapid Golgi impregnations of the ascending branches of the auditory nerve fibers and of the types of neurons in the anteroventral cochlear nucleus (AVCN) were studied. Entire ascending branches could be observed, some of these branches project to each subdivision, others do not. There are two main typesof large neurons: the bushy and stellate cells.(More)
A wide range of experimental manipulations results in an anovulatory polycystic ovarian (PCO) condition in the rat. Although PCO has been studied in a number of these models, research has centered on the condition after it is well established rather than as it develops. Consequently, it is still not clear exactly what follicular cysts are or how and why(More)
The distribution of somatostatin was studied in the rat with an immunoperoxidase technique and rabbit anti-somatostatin. Somatostatinergic neurons were identified in the preoptic and anterior periventricular hypothalamus between the anterior commissure, optic chiasm, and the anterior portion of the ventromedial nucleus.
Young adult cyclic female rats were each injected with 2 mg estradiol valerate (EV) in sesame oil. Controls received an equivalent volume of sesame oil. Within 2 months after injection, most of the EV-treated animals showed persistent vaginal estrus and small polyfollicular ovaries as well as pathological changes in the hypothalamic arcuate nucleus. This(More)
Gomori astrocytes, which are prominent in periventricular regions of the brain, contain inclusions that stain with Gomori dyes, and exhibit an orange-red autofluorescence and a non-enzymatic peroxidase activity. Recently, such astrocytes have been induced in dispersed glial cultures by exposure to cysteamine. Using these cells, we have shown that the(More)
Large subcutaneous doses (2 mg/21 days) of estradiol valerate (EV) given over several months will induce a prolactin and growth hormone-secreting pituitary tumor in female rats. The medial basal hypothalami (MBHs) of such EV-treated animals were examined at different time intervals with light and electron microscopes to determine whether EV affects the MBH(More)
Oestrogens exert potent influences on hypothalamic differentiation and on sexual function throughout life. During the period in which the hypothalamus differentiates, the availability of oestrogens (or aromatizable androgens) to the hypothalamus results in a male pattern of gonadotropin secretion and in male sexual behaviour in the adult. Lack of oestrogens(More)
A healthy well-androgenized male with no apparent defects of the endocrine system or ciliated epithelium presented with suspected infertility. A detailed electron-microscopic analysis of the semen showed viable but immotile spermatozoa manifesting a complex spectrum of fine-structural defects primarily in the flagella. The complex of deficits that can be(More)