Showing papers in "Hormones and Behavior in 1974"

TL;DR: Ovariectomized female rats were administered estradiol benzoate and either 10, 25, 50, 100, or 200 μg of progesterone and tested for sexual receptivity and the probability of lordosis was related directly to the dose of both steroids.

TL;DR: Plasma testosterone levels measured by radioimmunoassay did not correlate with dominance rank or aggressive behavior in 21 adult males of a natural troop of Japanese macaques (Macaca fuscata), and data validated the method used in the study of the natural troop.

TL;DR: Septal lesions increase behavioral responsiveness to estrogen of male, female, and androgen-sterilized female (ASF) rats as measured by lordosis behavior, and the septal region appears to exert a tonic inhibition on female sexual behavior.

TL;DR: Dihydrotestosterone propionate and testosterone Propionate were both effective in establishing the complete male sexual behavior pattern, although they differed in the manner in which they affected specific components.

TL;DR: It was found that pregnant and especially lactating hamsters were more aggressive than pseudopregnant or estrous cycling females and aggression tended to be higher on certain days: the day preceding behavioral estrus of the estrous cycle, Day 10 of pregnancy, and the first 5 days of lactation.

TL;DR: It is concluded that the effects of DHT on estradiol-induced mounting and receptivity most likely result from the action of this androgen on the brain, and not from the stimulatory effect which DHT may exert on genital sensory receptors.

TL;DR: V Videotape sampling of behavior in a dual-chambered apparatus indicates that the continuous monitoring of the amount of time a mother spends in the cage with its litter can be taken as a valid reflection of maternal behavior.

TL;DR: Responses of male and female rats during the initiation of lordosis by the female are described using observations with films taken from a side or ventral view and responsive females to mounts by the male rat are compared.

TL;DR: The results would indicate that the septum is important in the control of androgen-dependent, intermale aggression in the male CF-1 mouse.

TL;DR: The data suggest that the response to estrogen decreases after estrogen deprivation, and that the animals given both hormones showed lordosis, while those which received only progesterone did not.

TL;DR: It is suggested that MSH may facilitate learning at low, but not at high, levels of shock, and higher defecation rates were found in groups receiving high levels of current and in groups received MSH.

TL;DR: The results indicate that this metabolite has behavioral influences similar to those of progesterone for both facilitation and inhibition of estrus, and it was suggested that the superior potency of injected progestersone may be due to mechanisms of bioavailability, including relative solubility differences of the two steroids when administered subcutaneously.

TL;DR: Female rats implanted on the day of birth with Silastic capsules containing nonesterified testosterone, androstenedione, or dihydrotestosterone facilitated phallic development andosterone almost completely inhibited lordosis behavior.

TL;DR: It was suggested that neither sexual arousal nor copulatory performance necessarily activates the pituitary-adrenal system and thus the elevated steroid levels may reflect an insufficient number of habituation trials with the receptive female.

TL;DR: Ovariectomized female rats were injected with estrogen and progesterone and actinomycin D was implanted into different brain areas and attempts to localize the site of action showed that implants into the preoptic region were effective even when the implant cannulae did not pierce the ventricles.

TL;DR: After gonadectomy, more individually caged female hamsters fought prior to the initiation of hormone treatments than did group-caged females, and both individually and group caged males fought infrequently after castration.

TL;DR: It is concluded that this simple inexpensive technique for chronic intravenous cannulation of small laboratory animals can be very useful for short- and long-term experiments in the field of hormones and behavior.

TL;DR: Investigation of masculine response potential in normal BDF1 female mice and in females who had been injected with 100 μg of testosterone propionate on the day of birth found neonatally androgenized females with or without TP in adulthood exhibited the full range of masculine responses including the ejaculatory reflex.

TL;DR: The results suggest that estrogen is involved in the regulation of lordosis behavior in TP-treated and intact male rats.

TL;DR: Estrous female voles (Microtus montanus) received no copulation, one ejaculatory series, or more than two series, and increasing amounts of copulatory stimulation were demonstrated to increase the probability of ovulation.

TL;DR: The congruence of male copulatory behavior and female reproductive physiology would seem to indicate a coadapatation among this species.

TL;DR: It was concluded that progesterone mimics the actions of adrenal hormones and that it permissively increases food intake of Adrenalectomized rats by improving the health of these animals.

TL;DR: The results show that MER-25 acts differently upon various estrogen sensitive behaviors in the female rat.

TL;DR: It is suggested that females derive different metabolic end-products from testosterone propionate, which can apparently provide more effective aggression-eliciting cues than are produced by the male mouse.

TL;DR: The results show that MSH affects the behavior of rats in another type of behavioral situation involving an appetitive operant response.

TL;DR: It is suggested that high levels of serum prolactin during late pregnancy are not essential for the initiation of maternal behavior in the rat.

TL;DR: The results suggest that in addition to its early “triggering” effects, estrogen has important “maintenance’ effects which determine the character of heat in guinea pigs.

TL;DR: Ovariectomy performed in conjunction with hysterectomy on the 14th day of pregnancy together with the presentation of young produced lactation but not fighting behavior, thus suggesting that fighting and lactation are controlled by somewhat different hormonal mechanisms.

TL;DR: The results suggest that the structural requirements of the androgen molecule for promoting body weight differ from those for stimulating sexual behavior and that the biological potency of these diverse androgens on male courtship behavior was reciprocal to that for weight-promoting potency.

TL;DR: The induction of sexual receptivity and its maintenance after copulation in ovariectomized female golden hamsters was found to be a function of the levels of ovarian hormones administered, with high levels of progesterone prolong slightly the duration of postcopulatory receptivity.