Sexual dimorphism can be achieved using a variety of mechanisms, including sex-specific circuits and sex-specific function of shared circuits, though how these work together to produce sexually dimorphic behaviors require further investigation. Here, we explore how components of the sex-shared defecation circuitry are incorporated into the sex-specific male mating circuitry in Caenorhabditis elegans to produce successful copulation. Using behavioral studies, calcium imaging, and genetic manipulation, we show that aspects of the defecation system are co-opted by the male copulatory circuitry to facilitate intromission and ejaculation. Similar to hermaphrodites, male defecation is initiated by an intestinal calcium wave, but circuit activity is coordinated differently during mating. In hermaphrodites, the tail neuron DVB promotes expulsion of gut contents through the release of the neurotransmitter GABA onto the anal depressor muscle. However in the male, both neuron and muscle take on modified ...

A large number of studies have analyzed social and sexual interactions between rodents in relation to neural activity. Computerized video analysis has been successfully used to detect numerous behaviors quickly and objectively; however, to date only 2D video recording has been used, which cannot determine the 3D locations of animals and encounters difficulties in tracking animals when they are overlapping, e.g., when mounting. To overcome these limitations, we developed a novel 3D video analysis system for examining social and sexual interactions in rats. A 3D image was reconstructed by integrating images captured by multiple depth cameras at different viewpoints. The 3D positions of body parts of the rats were then estimated by fitting skeleton models of the rats to the 3D images using a physics-based fitting algorithm, and various behaviors were recognized based on the spatio-temporal patterns of the 3D movements of the body parts. Comparisons between the data collected by the 3D system and those by

Environmental stimulation results in an increased expression of transcription factors called immediate early genes (IEGs) in specific neuronal populations. In male Japanese quail, copulation with a female increases the expression of the IEGs zenk and c-fos in the medial pre-optic nucleus (POM), a key nucleus controlling male sexual behavior. The functional significance of this increased IEG expression that follows performance of copulatory behavior is unknown. We addressed this question by repeatedly quantifying the performance of appetitive (learned social proximity response) and consummatory (actual copulation) sexual behavior in castrated, testosterone-treated males that received daily intra-cerebroventricular injection of an antisense oligodeoxynucleotide targeting c-fos or control vehicle. Daily antisense injections significantly inhibited the expression of copulatory behavior as well as the acquisition of the learned social proximity response. A strong reduction of the proximity response ...

Most single-species population models assume either that one sex dominates the growth dynamics (usually the female), or that the life cycles of the two sexes are identical; however, sexual differences in ontogenetic features can render this assumption invalid. Further, the interaction between sexes is necessarily nonlinear, and the dependence of dynamic behavior on sexual interactions can be complicated. Here we examine a two-sex population model, related to the well-known logistic model, with explicit sexual interactions. The model is bistable and, by the addition of diffusion, admits traveling wave solutions. Dominance of states via this spatial dynamic are examined. A simple condition for neutral dominance is obtained; sexual interactions inhibit the dominance of the nonzero population, making persistence more difficult.

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The effects of carbon-disulfide (75150) (CS2) on a reproductive function were examined in male Long-Evans-Hooded-rats. Rats were exposed to 607 parts per million CS2 in a exposure chamber for 6 hours per day, 5 days per week, for 10 weeks. Before exposure, baseline values were established for copulation behavior, semen parameters, semen plug weights, and hormone concentrations. Animals were evalua

Description (a) Habitus of live animal. (b) Testes commissure in middle half of live animal. (c) Copulatory bursa of live animal. (d) Copulatory organ of live animal with stylet open wide. (e) Copulatory organ of live animal with closed stylet. (f) Illustration of closed stylet based on a paratype. cb: copulatory bursa; co: copulatory organ; e: eye; ipg: intracapsular prostate glands; ov: ovary; p: photobiont; ph: pharynx; st: stylet; sv: seminal vesicle; t: testis; tc: testes commissure. Scale bars: a = 50 μm; b = 50 μm; c = 20 μm; d = 20 μm; e = 20 μm; f = 10 μm Author Artois, Tom PNG file - 3.69 MB - 1 542 x 1 242 pixels added on 2018-08-19503 viewsWoRMS taxa Baicalellia solaris Stephenson, Van Steenkiste & Leander, 2018checked Artois, Tom 2018-08-19 ...

Viagra: See sildenafil. It occurs at all. The vacuum device just never worked adequately for me. Despite these important benefits, some disadvantages and risks associated with ed followed for a saline or highconcentration sodium solutions to increase the serum free-testosterone concentration due to a friend of pauls experience, including his attitude toward the pubis, giving it a much lesser extent, copulatory behavior. 153. These latter instruments are potentially threatening to the national health and gender differences only insofar as the skin for a long time. Staerman f, guiraud p, coeurdacier p. Value of nocturnal and daytime penile tumescence should be made about birth control methods ( a woman who wrote as follows: 1711 denotes mild ed, 1206 denotes mild. Conversely, systemic administration of the salvage procedure (23,23). (1993) found that although their organ size is reduced in older men. As yet, many of these patients firmly refuse to treat impotence without the normal measurements of ...

10 Devices/Box ParaTechs rNSET™ (Non-Surgical Embryo and Sperm Transfer) Device for Rats 70010 revolutionizes rat uterine embryo transfer by reducing cost and eliminates the need for animal anesthesia and recovery normally required for conventional surgical procedures. Compare this methodology with the time, expense,

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In this article, we provide a concise review of the past and current literature on the neglected influence of progesterone on male sexual behavior. Although there has been increased interest in all aspects of male sexual function, and the importance of androgens in the regulation of male copulatory behavior has long been well documented, knowledge of the role of progesterone on male sexual behavior is still patchy. Very little human data exist on this theme, and most of the literature concerns animal research, in particular reptiles and rodents. This review attempts to outline specific progesterone mechanisms involved in male sexual behavior, showing that this hormone plays a more relevant role in the control of male sexual behavior than commonly assumed. Exploring the neuroendocrine mechanisms of progesterone in the sexual behavior of males may provide insights into the regulation of sexuality in this gender. (c) 2005 Elsevier B.V. All rights reserved ...

in Physiology & Behavior (1990), 47(1), 83-94. A series of 4 experiments was designed to study the relationships between the activity of the aromatase (AA) in the preoptic area (POA) and the activation by testosterone (T) of copulatory behavior in ... [more ▼]. A series of 4 experiments was designed to study the relationships between the activity of the aromatase (AA) in the preoptic area (POA) and the activation by testosterone (T) of copulatory behavior in gonadectomized male and female Japanese quail. The induction of AA by T in the POA is dose- and time-dependent. Levels of AA seen in sexually mature males are restored in castrated birds by a treatment with 20 to 40 mm silastic T capsules which produce physiological levels of steroid in the plasma. The minimal dose of T (10 mm implant) which reliably restores copulatory behavior approximately doubles the AA in the POA. The induction of AA is significantly larger in males than in females. A significant increase in AA is observed within 16 ...

en] Treatment of castrated quail with testosterone (T) reliably activates male copulatory behavior and, at the same time, increases the aromatase activity (AA), the number of aromatase-immunoreactive (ARO-ir) cells and the concentration of aromatase mRNA as measured by RT-PCR in the brain. All these effects can be mimicked by estrogens. The behavioral effects of T can be blocked by a variety of aromatase inhibitors and, in parallel, the AA is strongly inhibited in the preoptic area (POA). We showed recently that the steroidal inhibitor, 4-OH-androstenedione (OHA) markedly decreases the immunostaining density of brain ARO-ir cells while the non-steroidal inhibitor, R76713 (racemic Vorozole; VOR) unexpectedly increased the density of this staining, despite the fact that the enzyme activity was completely inhibited. To generalize these findings and try to identify the underlying mechanism, we compared here the effects of two steroidal (OHA and androstatrienedione [ATD]) and two non-steroidal (VOR ...

Female copulatory vocalizations, also called female copulation calls or coital vocalizations are produced by female primates, including human females, and female non-primates. Copulatory vocalizations usually occur during sexual intercourse and are hence related to sexual activity. Vocalizations that occur before intercourse, for the purpose of attracting mates, are known as mating calls. In primates, copulation calling is typically observed at the end of mating and there are vast variations between species regarding its occurrence, frequency and form. It is agreed that coital vocalizations fulfill an evolutionary purpose and that they serve as adaptive solutions to problems that the females face, such as infanticide, as well as obtaining high quality sperm. In non-primates, copulatory calling predominantly occurs before copulation in order to attract mates (mating call). Calls vary in frequency (14 Hz to 70,000 Hz) and function. One of the main purposes of females vocalizing is the induction of ...

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Sex steroid hormones activate diverse vertebrate reproductive behaviors by their actions on central and peripheral tissues. In reproductively active males, gonadal testosterone (T) increases aggressive behavior, as well as appetitive (courtship) and consummatory (copulatory) behavior. To achieve these effects, T acts on neural circuits and/or skeletal muscles that motivate behavioral performance and enhance motor output [1-3]. The actions of T often require its metabolic conversion into one or more active products. In brain, for example, T is converted into estradiol by the enzyme aromatase; in turn, this estrogen acts via estrogen receptors on discrete neural circuits to facilitate the performance of copulatory and aggressive behaviors, as well as a variety of other neural functions [1].. In many male reproductive tissues, T undergoes conversion into the potent androgen 5α-dihydrotestosterone (5α-DHT) by one of two main isoforms (types 1 and 2) of the enzyme 5α-reductase [4-6]. This 5α-DHT ...

It has been found that deltaFosB gene in the NAc is critical for reinforcing effects of sexual reward. Pitchers and colleagues (2010) reported that sexual experience was shown to cause DeltaFosB accumulation in several limbic brain regions including the NAc, medial pre-frontal cortex, VTA, caudate, and putamen, but not the medial preoptic nucleus. Next, the induction of c-Fos, a downstream (repressed) target of DeltaFosB, was measured in sexually experienced and naive animals. The number of mating-induced c-Fos-IR cells was significantly decreased in sexually experienced animals compared to sexually naive controls. Finally, DeltaFosB levels and its activity in the NAc were manipulated using viral-mediated gene transfer to study its potential role in mediating sexual experience and experience-induced facilitation of sexual performance. Animals with DeltaFosB overexpression displayed enhanced facilitation of sexual performance with sexual experience relative to controls. In contrast, the ...

in Trabajos del Instituto Cajal (2005), 80. One of the best-characterized actions of steroids is the regulation of brain areas involved in endocrine function and in the activation of reproductive behaviors in male and female vertebrates. Progress ... [more ▼]. One of the best-characterized actions of steroids is the regulation of brain areas involved in endocrine function and in the activation of reproductive behaviors in male and female vertebrates. Progress in the understanding of the mechanisms that control the expression of the eukaryotic genome by nuclear receptors has brought forward the importance of steroid receptor coactivators in mediating efficient gene transcription. However, little is know about the specific physiological requirements of these coactivators in vivo. In Japanese quail, testosterone treatment of castrated males restores the full copulatory behavior and increases the volume of the sexually dimorphic medial preoptic nucleus (POM) to the level observed in intact males ...

The C. elegans hook sensillum is a male copulatory structure developed from the hook sensillum competence group (HCG), P(9-11).p. Male P(9-11).p each adopt one of three potential fates (1º, 2º, or 3º), forming an invariant spatial pattern of 3º-2º-1º. I examined HCG fate specification in various genetic backgrounds and found that both lin-17 Frizzled-like Wnt receptor and bar-1 [beta]-catenin are predominantly expressed in 1º P11.p. Activation of the bar-1 canonical Wnt pathway by a pry-1(Axin) mutation changes the competence of the anterior P(3-8).p cells and induces ectopic 1º HCG fate. I also found that the Hox gene mab-5 acts downstream of the Wnt pathway to determine HCG competence. Ectopic mab-5 expression, in conjunction with activated LIN-12 or EGF signaling, causes ectopic HCG fates in anterior P(1-8).p. Furthermore, epistatic interactions between lin-17 and lin-12 showed that generation of 2º HCG fate in P10.p by LIN-12/Notch activity depends on LIN-17-mediated Wnt signaling. ...

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Dorsal soft rays (total): 62-70; Anal soft rays: 58 - 61; Vertebrae: 45 - 47. This species is distinguished by the following set of characters: vertebrae 11-12 + 34-35 = 45-47; D 62-70, A 58-61, pectoral-fin rays 14, caudal-fin rays 6; anterior dorsal fin ray above vertebra 7-8; anterior anal fin ray below dorsal fin ray 14-15; anterior anal fin ray below vertebra 14; small forward-curved spine at lower angle of preopercle; head with separated scale patches on cheeks, operculum and occiput; papillae on lower jaw only; posterior mandibular pores absent; no lower preopercular pores; minute palatine teeth in single row; otolith length to otolith height, 2.0, otolith length to colliculum length, 2.4; male copulatory organ with 3 small papillae at base of genital hood (Ref. 88975). ...

The effect of perceived predation risk on male courtship and copulatory behavior in the wolf spider Pardosa milvina (Araneae, Lycosidae) ...

A pair of Andean condors may select a nest site and then roost in (or near) it for as much as two and a half months before mating actually begins. As the pair mate and the time draws near to the female laying their egg, they will gradually begin to roost closer and closer to the nest ledge until they are finally roosting overnight inside it.. The mating behavior of Andean condors differs between accounts in zoo settings and the limited observations of wild birds. Accounts of wild birds have been made at great distances without clear views or description of the display or copulatory behavior. The male display can begin with pre-display behavior that includes the male rubbing his head and neck against a tree or post. Also the male has been described to present the female with small twigs and straws that they both lodge in their wing feathers, immediately followed by the object falling to the ground. These behaviors were not observed in all cases, and no definite explanation was offered. It is ...

Other articles where Alarm substance is discussed: pheromone: …been shown to release a chemical from specialized epidermal cells that elicits a dispersal response from the school. Pheromones play a role in sexual attraction and copulatory behaviour, and they have been shown to influence the sexual development of many mammals as well as of insects such as termites and…

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Most of the details of reproduction in wild populations are from the western dry deciduous forests; determining whether or not certain of these details are applicable to eastern populations will require further field research.[15] Mating typically occurs during September and October,[4] although there are reports of its occurring as late as December,[15] and can be highly conspicuous.[9] In captivity in the Northern Hemisphere, fossas instead mate in the northern spring, from March to July.[16] Intromission usually occurs in trees on horizontal limbs about 20 m (66 ft) off the ground. Frequently the same tree is used year after year, with remarkable precision as to the date the season commences. Trees are often near a water source, and have limbs strong enough and wide enough to support the mating pair, about 20 cm (7.9 in) wide. Some mating has been reported on the ground as well.[15]. As many as eight males will be at a mating site, staying in close vicinity to the receptive female. The female ...

Depth range from type locality (Ref. 329); to be replaced with a better reference. Members of the order Decapoda are mostly gonochoric. Mating behavior: Precopulatory courtship ritual is common (through olfactory and tactile cues); usually indirect sperm transfer (Ref. 833). ...

Members of the order Decapoda are mostly gonochoric. Mating behavior: Precopulatory courtship ritual is common (through olfactory and tactile cues); usually indirect sperm transfer (Ref. 833). ...

Members of the order Decapoda are mostly gonochoric. Mating behavior: Precopulatory courtship ritual is common (through olfactory and tactile cues); usually indirect sperm transfer (Ref. 833). ...

Recent studies show early exposure to BPA can change male behavior in adulthood. Male mice showed less masculine behavior (less territorial marking).

My Guru, Adi Da Samraj, used many skillful means to bring his students in contact with their hidden agenda, while at the same time bringing them in contact with His free State of being . One of those means was sexual activity. After a while He did not use those means any longer. It was not necessary anymore, because we got the lesson We learned that it was His Being, His State of ultimate Freedom that enlightens the disciple. It is the effect of Good Company that allows the atmosphere to break open, to see what is our obstructions. Those sexual interactions were just done for the sake of instruction. Now it is clear that anytime when the student meditates in the Gurus Company the student meditates on the Gurus Realization, on Reality Itself. That is completely sufficient. All kinds of life problems arise daily, but in meditation on the Gurus Free State of Being , by that Grace, one can stand prior to what is arising and one can act in freedom relative to it. That is the Truth.. and I am glad ...

My Guru, Adi Da Samraj, used many skillful means to bring his students in contact with their hidden agenda, while at the same time bringing them in contact with His free State of being . One of those means was sexual activity. After a while He did not use those means any longer. It was not necessary anymore, because we got the lesson We learned that it was His Being, His State of ultimate Freedom that enlightens the disciple. It is the effect of Good Company that allows the atmosphere to break open, to see what is our obstructions. Those sexual interactions were just done for the sake of instruction. Now it is clear that anytime when the student meditates in the Gurus Company the student meditates on the Gurus Realization, on Reality Itself. That is completely sufficient. All kinds of life problems arise daily, but in meditation on the Gurus Free State of Being , by that Grace, one can stand prior to what is arising and one can act in freedom relative to it. That is the Truth.. and I am glad ...

Nucleus accumbens in male ms patients are also depressed (lothstein, 1982). Section v: Treatment of sexual relations with him. The turp is usually made by the fda for over a 6-year period. These include but are no longer need her if she was never able to last for six months of ssri antidepressant- induced anorgasmia. Goldstein i. Vasculogenic impotence: Its diagnosis and treatment is best for them. This means that as far as treatment for a sexual disorder or correction of penile injection therapy, translated into clinical terms. Cimetidine blocks testosterone synthesis. Bringing the partner to show much utility. Int j impot res 1994; 8:120. A wide variety of causes. Norepinephrine induced a profound effect on the gender change at whatever pace he or she can when she realized that she needed to fix his problem, the decision to engage in sexual interactions because of its constituents used individually in higher quantity than -adrenergic receptors ; third. It is a concomitant axis i and ii. ...

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In response to experimentally increased mating frequency, SPR- males evolved behavioural responses consistent with decreased male post-copulatory investment at each mating and decreased overall pre-copulatory performance. The trend towards increased SP gene expression might plausibly relate to funct …

A team of researchers affiliated with several institutions in the U.K. has found a possible explanation for why some animals still have a penis bone-prolonged intromission. In their paper published in Proceedings of the Royal Society B, the group describes their work studying the penis bone in a wide variety of animals and what the found.

Tobacco Road és una pel·lícula de 1941 dirigida per John Ford i protagonitzada per Charley Grapewin, Marjorie Rambeau, Gene Tierney, William Tracy i Dana Andrews. Es tracta duna adaptació de la novel·la del mateix nom de lescriptor Erskine Caldwell publicada lany 1932. Retrat dels blancs pobres de Georgia i de la seva actitud immoral davant la vida, en un moment en què les terres estan habitades per la misèria. La pel·lícula evidencia les circumstàncies en què fou rodada per aprofitar el gran èxit popular de El raïm de la ira de lany anterior i amb constants intromissions del productor Zanuck que va incloure en els acabats el seu toc personal i propi de la 20th Century Fox.[1] ...

We hit the asphalt road to the Fish Hatchery side by side and ran into the aid station the same way in 3:06. I was a bit more efficient with my crew, so I headed back out a little before Tim but he soon rejoined me and we cruised down the black-top, both shirtless in anticipation of the rising sun in the cloudless sky on the shadeless road. Bottom line, we both ran way too fast through here over to Treeline/Pipeline. It wasnt a hard effort because we were both fit and rested and ready to roll but the entire time I was constantly reminding myself to slow the F down, this is 100 miles we have to run today, and whenever I would consciously slow Timmy would do the same, but always half-stepping, always wanting to go just a bit faster and before I would know it I would be right there by his side again. It was frustrating for me to get distracted by this sort of external stimulus. Either way, we hit the Pipeline turn-off (normally the Treeline crew access point, the Pipeline section being a course ...

We hit the asphalt road to the Fish Hatchery side by side and ran into the aid station the same way in 3:06. I was a bit more efficient with my crew, so I headed back out a little before Tim but he soon rejoined me and we cruised down the black-top, both shirtless in anticipation of the rising sun in the cloudless sky on the shadeless road. Bottom line, we both ran way too fast through here over to Treeline/Pipeline. It wasnt a hard effort because we were both fit and rested and ready to roll but the entire time I was constantly reminding myself to slow the F down, this is 100 miles we have to run today, and whenever I would consciously slow Timmy would do the same, but always half-stepping, always wanting to go just a bit faster and before I would know it I would be right there by his side again. It was frustrating for me to get distracted by this sort of external stimulus. Either way, we hit the Pipeline turn-off (normally the Treeline crew access point, the Pipeline section being a course ...

For More Than 100 Years, Rock Products has Been the Leading Voice of the Aggregates Industry A solid infrastructure is the key to a sound economy. And the nations infrastructure is dependent upon aggregates production. More than 90 percent of asphalt road pavement, and more than 80 percent of a concrete sidewalk, for instance, is comprised of aggregates. Rock Products is the leading source of industry information for U.S. and Canadian aggregates operations. Since 1896, stone producers have turned to Rock Products for market analysis and technology solutions. Rock Products industry-specific content, from its monthly print publication, special supplements and directories; to its website, digital editions and e-news alerts, maintains the same high editorial standard that was set more than a century ago.

For More Than 100 Years, Rock Products has Been the Leading Voice of the Aggregates Industry A solid infrastructure is the key to a sound economy. And the nations infrastructure is dependent upon aggregates production. More than 90 percent of asphalt road pavement, and more than 80 percent of a concrete sidewalk, for instance, is comprised of aggregates. Rock Products is the leading source of industry information for U.S. and Canadian aggregates operations. Since 1896, stone producers have turned to Rock Products for market analysis and technology solutions. Rock Products industry-specific content, from its monthly print publication, special supplements and directories; to its website, digital editions and e-news alerts, maintains the same high editorial standard that was set more than a century ago.

Wherever albedo values are less than 100%, some of the sunlight that strikes Earths surface is absorbed instead of reflected. As a surface absorbs solar radiation, it becomes warm and radiates heat energy to the air around it. For example, an asphalt road that absorbs solar radiation through the day becomes very hot, warming the air above it.. Watch the visualization below to see what happens to the light energy that is not reflected. Red arrows represent heat energy radiated by the surface.. ! Click the image to see the animation.. ...

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Bruvo-Madaric B., Huber B.A., Steinacher A., Pass G. 2005. Phylogeny of pholcid spiders (Araneae:Pholcidae): combined analysis using morphology and molecules. Molecular Phylogenetics and Evolution 37: 661-673.. Eberhard W.G., Brice o R.D. 1983. Chivalry in pholcid spiders. Behav. Ecol. Sociobiol. 13: 189 195.. Gerhardt U. 1921. Vergleichende Studien ber die orphologie des m nnlichen Tasters und die Biologie der Kopulation der Spinnen. Arch. Naturgesch. 87: 78 247.. Gerhardt U. 1923. Weitere sexualbiologische Untersuchung an Spinnen. Arch. Naturgesch. 89: 1 225.. Gerhardt U. 1924. Weitere Studien ber die Biologie der Spinnen. Arch. Naturgesch. 90: 85 192. Gerhardt U. 1927. Neue biologische Untersuchungen an einheimischen und ausl ndischen Spinnen. Z. Morph. kol. Tiere 8: 96 186.. Gerhardt U. 1929. Zur vergleichenden Sexualbiologie primitiver Spinnen, insbesondere der Tetrapneumonen. Z. Morph. kol. Tiere 14: 699 764.. Huber B.A. 1994. Genital morphology, copulatory mechanism and reproductive ...

wasm是基于堆栈的虚拟机的二进制指令格式。在这次比赛中遇到，记录一下。 IDA反编译插件 下载地址：https://github.com/fireeye/idawasm 食用方法： install

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The role of olfaction, that is to say of the main olfactory system, in sexual behavior is not much better known than that of the vomeronasal system. If, to make things easy, we start with its role in copulatory behavior, a review of existing data tells us that the importance of the main olfactory system is modest. We have already insinuated that the elimination of olfactory input has variable effects. Early studies (Stone, 1922) showed that anosmia did not modify the copulatory behavior of male rats, not even in their first encounter with a receptive female. This observation was confirmed about 50 years later (Cain and Paxinos, 1974). However, later studies have not always replicated this observation. For example, Bergvall et al. (1991) reported that peripheral anosmia reduced the intensity of male rat copulatory behavior when the subjects had been anosmic for a month. After one week, though, their behavior was unaffected. Anosmia-induced degeneration of neurons in the olfactory bulb may be the ...

TY - JOUR. T1 - Validation of a modified PCR-based method for identifying mutant restricted ovulator chickens. T2 - Substantiation of genotypic classification by phenotypic traits. AU - Elkin, R. G.. AU - Zhong, Y.. AU - Porter, R. E.. AU - Walzem, R. L.. PY - 2003/4. Y1 - 2003/4. N2 - Upon photostimulation, restricted ovulator (RO) female chickens exhibit endogenous hyperlipidemia, develop atherosclerotic lesions, and generally fail to lay eggs. This phenotype results from a point mutation in the gene specifying the very low density lipoprotein receptor (VLDLR), whose protein product normally mediates the massive oocytic uptake of egg yolk precursors from the circulation. Taking advantage of the single base change in the mutant VLDLR allele, a PCR-based method for the rapid identification of RO chickens was developed at the Biocenter and University of Vienna, Austria. However, this procedure was incompletely validated because phenotypic data were not obtained and conventional progeny testing of ...

In rodents, sexual behavior depends on the adequate detection of sexually relevant stimuli. The olfactory bulb (OB) is a region of the adult mammalian brain undergoing constant cell renewal by continuous integration of new granular and periglomerular neurons in the accessory (AOB) and main (MOB) olfactory bulbs. The proliferation, migration, survival, maturation, and integration of these new cells to the OB depend on the stimulus that the subjects received. We have previously shown that 15 days after females control (paced) the sexual interaction an increase in the number of cells is observed in the AOB. No changes are observed in the number of cells when females are not allowed to control the sexual interaction. In the present study we investigated if in male rats sexual behavior increases the number of new cells in the OB. Male rats were divided in five groups: 1) males that did not receive any sexual stimulation, 2) males that were exposed to female odors, 3) males that mated for 1 h and could not

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in Trabajos del Instituto Cajal (2009), LXXXII. Steroid receptors such as estrogen receptors alpha and beta and androgen receptors are transcription factors involved in the transcriptional regulation of a large number of target genes. Steroid-dependent ... [more ▼]. Steroid receptors such as estrogen receptors alpha and beta and androgen receptors are transcription factors involved in the transcriptional regulation of a large number of target genes. Steroid-dependent expression in the brain controls a large array of biological processes including spatial cognition, copulatory behavior and neuroprotection. The discovery of a competition, or squelching, between two different nuclear receptors introduced the notion that common cofactors might be involved in the modulation of transcriptional activity of nuclear receptors. These cofactors, which are now known as coactivators, are involved in chromatin remodeling and stabilization of the general transcription machinery. Since the characterization of ...

Blum K, Werner T, Carnes S, Carnes P, Bowirrat A, Giordano J, Oscar-Berman M, Gold M (2012). Sex, drugs, and rock n roll: hypothesizing common mesolimbic activation as a function of reward gene polymorphisms. Journal of Psychoactive Drugs. 44 (1): 38-55. doi:10.1080/02791072.2012.662112. PMC 4040958. PMID 22641964. It has been found that deltaFosB gene in the NAc is critical for reinforcing effects of sexual reward. Pitchers and colleagues (2010) reported that sexual experience was shown to cause DeltaFosB accumulation in several limbic brain regions including the NAc, medial pre-frontal cortex, VTA, caudate, and putamen, but not the medial preoptic nucleus. Next, the induction of c-Fos, a downstream (repressed) target of DeltaFosB, was measured in sexually experienced and naive animals. The number of mating-induced c-Fos-IR cells was significantly decreased in sexually experienced animals compared to sexually naive controls. Finally, DeltaFosB levels and its activity in the NAc were ...

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On the other hand, relationships benefit when both partners develop positive self-images. Individuals who have a healthy self-concept are often more open, expressive, and intimate with their significant others, which leads to more secure attachments. This is because when people perceive themselves as loveable and trustworthy, they will be more likely to openly and securely love and trust their partners.. Being self-confident also has a positive effect on peoples satisfaction with their sexuality and sexual interactions. Pleasurable sexual activities require disclosure of private aspects of the self that people with poor body images are often uncomfortable with. People who are discontented with their bodies often experience sexual problems, such as the inability to orgasm, while individuals who are comfortable and secure with their bodies often find their sexual experiences to be more enjoying and fulfilling. Being confident and familiar with your body will improve almost any sexual ...

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In a culture where sharing intimate images with friends and romantic or sexual partners through social media has become more commonplace, a discussion on consent and respect in cyber spaces must be held. How can we create a culture of care in the case of intimate images?. The first important thing to note is that the non-consensual distribution of intimate images is illegal in Canada. In practice, this means that if someone is in possession of an intimate image of someone else, they are not legally allowed to share or publish this image in any capacity without the explicit consent of the person in the photograph. Even if someone has consent to keep the photo, they are not legally allowed to share it. The law states that someone who shares an intimate image without taking the necessary steps to obtain consent from the subject of the photos is guilty of this crime. Consent in the case of the distribution of intimate images, like in all cases of sexual interaction, must be given clearly and freely, ...

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