scholarly journals Prefrontal cell firing in male rats during approach towards sexually receptive female: Interactions with cocaine

Synapse ◽  
2011 ◽  
Vol 65 (4) ◽  
pp. 271-277 ◽  
Author(s):  
Marcelo Febo
Keyword(s):  
Receptive Female ◽  
Male Rats ◽  
Cell Firing

Testicular hormones and intermale aggressive behaviour in the presence of a female rat

1984 ◽  
Vol 100 (3) ◽  
pp. 315-321 ◽  
Author(s):  
G. T. Taylor ◽  
J. Haller ◽  
R. Rupich ◽  
J. Weiss
Keyword(s):  
Aggressive Behaviour ◽  
Testosterone Propionate ◽  
Receptive Female ◽  
Male Rats ◽  
Female Rat ◽  
Intact Male ◽  
Respective Control ◽  
Behavioural Changes ◽  
Aggressive Behaviours

ABSTRACT A hypothesis was examined that increased levels of available testicular hormones are responsible for the increased aggressiveness of males in the presence of a female. In the first of two experiments intact male rats were injected with the androgen antagonist flutamide before exposure to oestrous, dioestrous or no females. Consistent with the hypothesis, flutamide-injected males were less aggressive than the respective control males which had been injected with oil alone. Yet the antiandrogen did not fully block the increased aggressiveness between males exposed to an oestrous female. In experiment 2 the aggressive behaviours of male rats in the presence of an oestrous female were observed after castration and restoration therapy with different amounts of testosterone propionate (TP). Neither a physiological amount (200 μg) nor an unusually large amount (800 μg) of TP could adequately mimic the effects of a gonadally intact male exposed to a sexually receptive female. These data suggest that differences in androgens available to target tissues influence aggressiveness among males exposed to a female. However, there are other factors involved, presumably the chronic morphological–physiological–behavioural changes that are provoked by copulatory experience. J. Endocr. (1984) 100, 315–321

scholarly journals Modelling sexual violence in male rats: The sexual aggression test (SxAT)

2021 ◽  
Author(s):  
Vinicius Elias de Moura Oliveira ◽  
Trynke R de Jong ◽  
Inga Neumann
Keyword(s):  
Aggressive Behavior ◽  
Sexual Aggression ◽  
Wistar Rats ◽  
Insular Cortex ◽  
Receptive Female ◽  
Male Rats ◽  
Aggression Test ◽  
Male Wistar Rats ◽  
Series Of Experiments ◽  
Social Decision Making

Sexual assault and rape are crimes that impact victims worldwide. Although the psychosocial and eco-evolutionary factors associated with this antisocial behavior have repeatedly been studied, the underlying neurobiological mechanisms are still unknown mainly due to the lack of an appropriate animal model of sexual aggression (SxA). Here, we established a novel paradigm to provoke and subsequently assess SxA in adult male Wistar rats: the sexual aggression test (SxAT). Briefly, male Wistar rats are sexually aroused by a receptive female, which is exchanged by a non-receptive female immediately after the first intromission. This protocol elicits forced mounting (FM) and aggressive behavior (AB) towards the non-receptive female to different degrees, which can be scored. In a series of experiments we can show that SxA behavior is a relatively stable trait in rats and correlates positively with sexual motivation. Rats with innate abnormal anxiety and aggressive behavior also show abnormal SxA behavior. In addition, central infusion of oxytocin moderately inhibits AB, but increases FM. Finally, we identified the agranular insular cortex to be specifically activated by SxA, and inhibition of this region mildly decreased AB during the SxAT. Altogether, the SxAT is a paradigm that can be readily implemented in behavioral laboratories as a valuable tool to find answers regarding the biological mechanisms underlying SxA in humans, as well as social decision-making in general.

scholarly journals The Rare Phenomenon of Consecutive Ejaculations in Male Rats

Sexes ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 183-188
Author(s):  
Joanna M. Mainwaring ◽  
Angela C. B. Garcia ◽  
Elaine M. Hull ◽  
Erik Wibowo
Keyword(s):  
Receptive Female ◽  
Male Rats ◽  
Female Rat ◽  
Sexual Behaviours ◽  
Rare Phenomenon ◽  
Mating Tests

Mounting, intromission and ejaculation are commonly reported sexual behaviours in male rats. In a mating session, they can have several copulatory series with post-ejaculatory intervals in between ejaculations before they reach sexual satiety. Here, we describe a phenomenon where male rats displayed consecutive ejaculations (CE) with a short inter-ejaculatory interval (IEI). Male rats were daily mated with a sexually receptive female rat. Two out of 15 rats displayed CE in one of their mating tests. The first rat had CE at 9.9 and 10.1 min (IEI = 16.3 s) after the start of the test. The second rat showed CE at 28.1 and 28.5 min (IEI = 18.7 s) after the test onset. During the IEI, the rats did not show any mounting or intromission.

The effect of post-weaning individual housing on 50-kHz calls emitted from male rats to sexually receptive female rats

2013 ◽  
Vol 110-111 ◽  
pp. 30-33 ◽  
Author(s):  
Hideaki Inagaki ◽  
Masayoshi Kuwahara ◽  
Hirokazu Tsubone ◽  
Yuji Mori
Keyword(s):  
Female Rats ◽  
Receptive Female ◽  
Male Rats ◽  
Individual Housing

scholarly journals Effect of Aqueous Extract ofMassularia acuminataStem on Sexual Behaviour of Male Wistar Rats

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
M. T. Yakubu ◽  
M. A. Akanji
Keyword(s):  
Body Weight ◽  
Aqueous Extract ◽  
Sexual Behaviour ◽  
Serum Testosterone ◽  
Female Rats ◽  
Receptive Female ◽  
Male Rats ◽  
Distilled Water ◽  
Once Daily ◽  
Massularia Acuminata

Ancient literature alluded to the use of a number of plants/preparations as sex enhancer. One of such botanicals isMassularia acuminatain which the stem has been acclaimed to be used as an aphrodisiac. Documented experiments or clinical data are, however, lacking. Therefore, this study was undertaken to evaluate the acclaimed aphrodisiac activity ofM. acuminatastem. Sixty male rats were completely randomized into 4 groups (A–D) of 15 each. Rats in group A (control) were administered with 1 mL of distilled water (the vehicle) while those in groups B, C, and D were given same volume containing 250, 500, and 1000 mg/kg body weight of the extract, respectively. Sexual behaviour parameters were monitored in the male rats for day 1 (after a single dose), day 3 (after three doses, once daily), and day 5 (after five doses, once daily) by pairing with a receptive female (1 : 1). The male serum testosterone concentration was also determined. Cage side observation on the animals revealed proceptive behaviour (ear wiggling, darting, hopping, and lordosis) by the receptive female rats and precopulatory behaviour (chasing, anogenital sniffing and mounting) by the extract-treated male rats. The extract at 500, and 1000 mg/kg body weight significantly (P<.05) increased the frequencies of mount and intromission. In addition, the ejaculation latency was significantly prolonged (P<.05). The latencies of mount and intromission were reduced significantly whereas ejaculation frequency increased. The extract also reduced the postejaculatory interval of the animals. Computed percentages of index of libido, mounted, intromitted, ejaculated and copulatory efficiency were higher in the extract treated animals compared to the distilled water-administered control whereas the intercopulatory interval decreased significantly. The extract also significantly (P<.05) increased the serum testosterone content of the animals except in those administered with 250 mg/kg body weight on days 1 and 3. Data from this study identified that the aqueous extract ofMassularia acuminatastem enhanced sexual behaviour in male rats. The improved sexual appetitive behaviour in male rats at the doses of 500 and 1000 mg/kg body weight ofMassularia acuminatastem may be attributed, at least in part, to the alkaloids, saponins, and /or flavonoids since these phytochemicals has engorgement, androgen enhancing, and antioxidant properties.

Sexual activity increases plasma concentrations of cholecystokinin octapeptide and offsets hunger in male rats

1987 ◽  
Vol 115 (1) ◽  
pp. 91-95 ◽  
Author(s):  
A. Linden ◽  
S. Hansen ◽  
I. Bednar ◽  
G. Forsberg ◽  
P. Södersten ◽  
...  
Keyword(s):  
Sexual Activity ◽  
Food Consumption ◽  
Sexual Behaviour ◽  
Plasma Concentrations ◽  
Receptive Female ◽  
Male Rats ◽  
Female Rat ◽  
Cholecystokinin Octapeptide

ABSTRACT Male rats deprived of food for 48 h ignored food pellets immediately after ejaculating with a sexually receptive female rat as did males tested 5 min after i.p. injection of 5 μg cholecystokinin octapeptide (CCK-8) or males which had consumed food pellets for 1 h. The concentration of CCK-8 in plasma was increased to comparable levels (10·1±3·8 (s.e.m.); 11·3 ± 3·7 and 7·2± 0·5 pmol/l respectively, compared with 1·2 ± 0·3 pmol/l for NaCl-injected controls) under each of these conditions, whereas the concentration of gastrin increased only after food consumption (18·4 ± 3·8; 17·7 ± 5·4 and 54·3± 7·0 pmol/l respectively, compared with 21·5 ± 2·1 pmol/l for NaCl-injected controls). The effect of ejaculation on the latency to starting to eat was partially reversed by i.p. injection of 50 mg of the CCK-8 antagonist proglumide, but neither treatment with proglumide or CCK-8 nor consumption of food affected the display of sexual behaviour. The results support the suggestion that CCK-8 is a 'satiety peptide' in the rat. J. Endocr. (1987) 115, 91–95

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