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Differential Effect of Acute Stress on Visuospatial Working Memory and Sexual Motivation in Male Rats

Journal of Behavioral and Brain Science 2015年第7期5卷 221-230页

作者： Marisela Hernández-González Enrique Hernández-Arteaga Mayra Linné Almanza-Sepúlveda miguel ángel guevara Instituto de Neurociencias Universidad de Guadalajara Guadalajara Jalisco México

Working memory is an executive function that is highly dependent on the functioning of the prefrontal cortex. Several studies using food or drink as rewards have demonstrated that rats are capable of performing tasks that involve working memory. Sexual behavior is another highly-rewarding, motivated behavior that has proven to be an efficient incentive in classical operant tasks. Considering that both sexual behavior and working memory are sensitive to the effects of stress, the aim of this study was to determine the effect of acute stress on visuospatial working memory during a sexually-motivated task (a nonmatching-to-sample task in a T-maze) in male rats. Thirty-two male Wistar rats were trained in the T-maze using sexual interaction (intromission and ejaculation) as a reinforcer during a 4-day training period (training sessions held every 4th day). On the basis of their performance, the rats were classified as good-learners (n = 12) and bad-learners (n = 20), and on the fifth day, 6 good-learners and 10 bad-learners were subjected to stress using the cold water immersion model (CWI, 15°C) for 15 minutes before they were evaluated in the T-maze. The remaining rats made up the control group (i.e., they performed the task without previous stress). Results showed that acute stress by CWI improved working memory in the bad-learners but did not affect the performance of the good-learners, although in both groups (good- and bad-learners) stress decreased the sexual motivation to perform the task. It is probable that the increased levels of corticosterone in the stress situation could activate glutamatergic transmission in the prefrontal cortex, thus facilitating working memory and, simultaneously, decreasing testosterone levels, which exerts a negative effect on sexual motivation in these male rats.

关键词： Stress Working Memory Sexual Behavior

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Basolateral Amygdala Inactivation Reduces Sexual Motivation in Male Rats during Performance of a T-Maze Task with a Sexual Reward

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Journal of Behavioral and Brain Science 2014年第5期4卷 223-233页

作者： Marisela Hernández-González Francisco Abelardo Robles Aguirre miguel ángel guevara Gina Lorena Quirarte Paulina Haro Magallanes Centro Universitario del Norte Universidad de Guadalajara Colotlán Jalisco México Instituto de Neurobiología Campus UNAM-UAQ Juriquilla Querétaro México Instituto de Neurociencias Universidad de Guadalajara Guadalajara Jalisco México

This study was aimed to determine the effect of amygdaline inactivation on the sexual motivation of male rats during a T-maze task with a sexual reward. Subjects were chronically implanted with two stainless-steel cannulae that enabled the infusion of tetrodotoxin, a sodium channel blocker, into the left and right basolateral amygdala (BLA). Animals were divided into 3 groups: saline (SS);TTX1 (tetrodotoxin at 2.5 ng);and TTX2 (tetrodotoxin at 5.0 ng). To induce a sexually-motivated state, all male rats were allowed to have an intromission with a receptive female before performing the T-maze task, after which their sexual motivation was evaluated during seven trials in which a receptive female was placed in one goal-box of the T-maze, and a non-receptive one in the other. Subjects were allowed an intromission as a sexual reward whenever they reached the goal-box containing the receptive female, but were returned to the start-box if they did not. At the end of the experiment, copulation until ejaculation was permitted. Both doses of TTX increased the time rats required to cross the maze stem during the final trials. In terms of sexual interaction, the high dose of TTX increased more markedly mount, intromission and ejaculation latencies and the number of mounts and intromissions. Overall, these results indicate that the BLA may play an important role in modulating sexual behavior, particularly in maintaining sexual motivation in successive trials in a T-maze task and during sexual interaction per se.

关键词： Basolateral Amygdala Sexual Motivation Sexual Reward T-Maze Tetrodotoxin Copulation Rats

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Alcohol Suppresses the Electroencephalographic Response to Visual Erotic Stimuli in Young Men

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Journal of Behavioral and Brain Science 2012年第3期2卷 363-371页

作者： Marisela Hernández-González Araceli Sanz-Martin miguel ángel guevara Claudia Amezcua-Gutiérrez Marina Ruiz Díaz Instituto de Neurociencias Universidad de Guadalajara Guadalajara México

Although the combination of alcohol and sex is frequently observed in human social interaction, many questions concerning alcohol’s effects on the processing of sexual stimuli and brain functionality remain unanswered. Erotic films eliciting sexual arousal in humans and affect electroencephalographic (EEG) activity. This study examines the effects of alcohol on cortical EEG activity in young men while viewing an erotic film. Heterosexual males participated in an independent alcohol/placebo group protocol. Thirty-five minutes after beverage ingestion, EEGs were recorded at prefrontal, temporal and parietal derivations in three conditions: baseline, and while watching erotic and neutral films. During the observation of erotic films, only the participants who drank the placebo beverage showed a decrease in alpha1 and an increase in the fast frequencies of the prefrontal regions, as well as a decrease in inter-prefrontal synchronization in the alpha and beta bands. Alcohol suppressed the prefrontal EEG changes associated with watching erotic visual stimuli without affect the sexual arousal. EEG data show that alcohol affecting the functioning of the prefrontal cortex, which could interfere with the adequate processing of visual erotic stimuli. These findings may contribute to improving our understanding of the brain mechanisms that underlie alcohol’s effects on the processing of sexual stimuli.

关键词： Alcohol Erotic Stimulation Sexual Arousal EEG Correlation Electroencephalogram

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EEG Correlations during WCST Performance in Female Adolescents with Sexual Abuse-Related Post-Traumatic Stress Disorder

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Journal of Behavioral and Brain Science 2015年第7期5卷 239-250页

作者： Lucía Ester Rizo-Martínez Araceli Sanz-Martin miguel ángel guevara Marisela Hernández-González Olga Inozemtseva Francisco Abelardo Robles-Aguirre Instituto de Neurociencias CUCBA Universidad de Guadalajara Guadalajara México Centro Universitario del Norte Universidad de Guadalajara Colotlán México

Child sexual abuse (CSA) survivors can present post-traumatic stress disorder (PTSD) and alterations in EEG activity and cognition. The aim of this study was to evaluate EEG correlations in female adolescents with CSA-related PTSD during performance of the Wisconsin Card-Sorting Test (WSCT). Inter- and intrahemispheric EEG correlations (INTERr and INTRAr) of those subjects were calculated at rest and during performance of WCST. On this task, the PTSD group obtained higher scores than the control group for the number of correct responses and failure to maintain set. In the between-groups comparisons, the PTSD group presented a higher INTERr between frontal areas in the gamma and slow bands, as well as a higher correlation in the delta band at Fp1-F3;however, this group presented a lower INTRAr between Fp1-P3 and Fp2-P4 in the theta and alpha1 bands. In the comparison between conditions, the PTSD group presented an increased correlation during execution of the WCST, mainly in the gamma band, while the control group showed a decrease of INTRAr in the slow bands. Results are discussed with respect to the influence of CSA- related PTSD on the development of cognition and functional connectivity in the brain.

关键词： Child Sexual Abuse Post-Traumatic Stress Disorder EEG Correlation WCST Adolescents

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Neuropsychological and Electrophysiological Evaluation after Rape: A Case Study of a Teenage Girl

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Journal of Behavioral and Brain Science 2014年第6期4卷 256-267页

作者： Lucía Ester Rizo-Martínez miguel ángel guevara Luis Francisco Cerdán Francisco Abelardo Robles-Aguirre Araceli Sanz-Martin Marisela Hernández-González Centro Universitario del Norte Universidad de Guadalajara Colotlán México Instituto de Neurociencias CUCBA Universidad de Guadalajara Guadalajara Jalisco México

Although rape is an event with a high incidence worldwide, there is currently no single consensus about both the general effects and the diagnosis and treatment of this. To evaluate the consequences of rape, a teenage girl was evaluated at two moments: a month-and-a-half and then a year-and-a-half after being raped. Clinical measurements, neuropsychological testing and electroencephalographic recording (EEG) were conducted in four conditions: eyes closed, eyes open, and during performance of two tasks: Towers of Hanoi and Wisconsin. Observations showed subsyndromal symptoms of post-traumatic stress on the first evaluation, and close-to-normal scores on the neuropsychological and cognitive tests in both assessments. Decreased cortical EEG synchronization, mainly in the fast frequencies and in almost all conditions, was obtained in the second evaluation. The results obtained in this study may indicate an early development in the brain, which is discussed in light of current literature on this topic.

关键词： Rape Adolescence EEG Clinical Evaluation Neuropsychological Testing

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Prefrontal and Accumbal Electric Activity during Auditory Stimulation in Virgin Female Rats: Changes Related to the Estrous Cycle

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Journal of Behavioral and Brain Science 2013年第6期3卷 454-462页

作者： Marisela Hernández-González Diego Radberto Chapa García Abascal miguel ángel guevara Ricardo Alonso Romero Orozco Mayra Linné Almanza Sepúlveda Leopoldo Eduardo Flores Mancilla Facultad de Medicina Universidad Autónoma de Zacatecas Unidad Académica de Medicina Humana y Ciencias de la Salud Zacatecas México Instituto de Neurociencias Universidad de Guadalajara Guadalajara México

The estrous cycle is a physiological process modulated by hormonal changes associated, in turn, with alterations of the attraction or sensitivity with which females perceive different sensory stimuli. Auditory stimuli play an important role in the social interaction of several mammals, including their sexual behavior and the mother-young relationship. Since the prefrontal cortex (PFC) and nucleus accumbens (Acc) had been associated with the processing and assignation of the incentive value of stimuli, this study was designed to analyze whether electroencephalographic (EEG) activity in the PFC and Acc was modified during the two antagonist phases of the estrous cycle (proestrus-estrus and diestrus) when female rats heard sound recordings with different types of cries emitted by other rats. EEGs were recorded in eight female virgin Wistar rats, 80-100 days old, bilaterally implanted in the PFC and Acc during an awake-quiet state, in three conditions: when hearing 1) cries of pups;2) cries of adult male rats;and, 3) cries of adult female rats. The cries were recorded from pups (2-10 days old) and male and female adult rats after gentle prodding by a human hand. Each auditory stimulus (which included vocalizations up to 22 kHz) was randomly played back through a speaker placed near the female rats. Only upon perceiving the cries of male rats did the females in the proestrus-estrous phase show a lower relative power in the 14-30 Hz band in the Acc and an increased inter-prefrontal correlation in the 8-13 Hz band. It is probable that these EEG changes are associated with the lower activation or non-anxious state that the female rat presents specifically during the proestrus-estrous phase in response to the alarm cries of adult male rats.

关键词： Auditory Stimulation EEG Accumbens Prefrontal Cortex Estrous Cycle Rats

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海外大型露天矿山智能化建设体系与应用实践——以拉斯邦巴斯铜矿为例

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金属矿山 2024年

作者：吴立活 miguel Canz Hermes guevara 李国清侯杰张永芳北京科技大学土木与资源工程学院拉斯邦巴斯铜矿 2. 五矿资源有限公司

拉斯邦巴斯铜矿运用现代化信息技术构建覆盖“地质资源—计划管理—过程控制—安全保障—智能决策”全方位智能化建设框架，通过关键应用场景设计与应用，实现矿山生产运营的高效协同与智能管理。针对矿体赋存条件复杂、开采规模庞大、... 详细信息

拉斯邦巴斯铜矿运用现代化信息技术构建覆盖“地质资源—计划管理—过程控制—安全保障—智能决策”全方位智能化建设框架，通过关键应用场景设计与应用，实现矿山生产运营的高效协同与智能管理。针对矿体赋存条件复杂、开采规模庞大、作业地点分散等问题，应用矿床地质建模、三维可视化及无人机技术，实现矿山全生命周期的地质资源精细化管控，在此基础上优化开采工艺，应用精准定位及智能卡调技术，实现大规模高陡边坡的精准穿孔、控制爆破以及矿岩运输。构建了以超前预防为目标，全面覆盖人、机、环、管，与生产过程深度融合的矿山安全监测预警体系，显著提升了矿山的安全作业水平。通过云平台和数据湖技术实现多源异构数据融合，应用机器学习算法构建数据分析与决策模型，为矿山管理者科学决策提供有力支持。拉斯邦巴斯铜矿智能化建设成果对国内大型露天矿山智能化建设具有一定示范作用。

关键词：海外矿产资源大型露天矿拉斯邦巴斯铜矿智能矿山应用场景

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EEGbands: A Computer Program to Statistically Analyze Parameters of Electroencephalographic Signals

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Journal of Behavioral and Brain Science 2014年第7期4卷 308-324页

作者： miguel Angel guevara Araceli Sanz-Martin Marisela Hernández-González Instituto de Neurociencias CUCBA Universidad de Guadalajara Guadalajara Jalisco México

The quantitative analysis of electroencephalographic activity (EEG) is a useful tool for the study of changes in brain electrical activity during cognitive and behavioral functions in several experimental conditions. Their recording and analysis are currently carried out primarily through the use of computer programs. This paper presents a computerized program (EEGbands) created for Windows operating systems using the Delphi language, and designed to analyze EEG signals and facilitate their quantitative exploration. EEGbands applies Rapid Fourier Transformation to the EEG signals of one or more groups of subjects to obtain absolute and relative power spectra. It also calculates both interhemispheric and intrahemispheric correlation and coherence spectra and, finally, applies parametrical statistical analysis to these spectral parameters calculated for wide frequency EEG bands. Unlike other programs, EEGbands is simple and inexpensive, and rapidly and precisely generates results files with the corresponding statistical significances. The efficacy and versatility of EEGbands allow it to be easily adapted to different experimental and clinical needs.

关键词： EEG Correlation EEG Coherence Relative Power Absolute Power EEG Software EEG Signal Analysis

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EEGcorco: a computer program to simultaneously calculate and statistically analyze EEG coherence and correlation

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Journal of Biomedical Science and Engineering 2011年第12期4卷 774-787页

作者： miguel Angel guevara Marisela Hernández-González Araceli Sanz-Martin Claudia Amezcua 不详

EEGcorco is a computer program designed to analyze the degree of synchronization between two electroencephalographic signals (EEG) by mean the analysis of correlation and coherence index. The correlation and coherence values permit the quantitative determination of the similarity among EEG signals from homologous areas of the cerebral hemispheres (interhemispheric), and among localized areas within one cerebral hemisphere (intrahemispheric). EEG coherence is a function of frequency;thus it is commonly presented in a spectral manner (coherence values in every frequency of the spectrum), in contrast, the correlation function has been employed mainly to search periodic components of bioelectrical signals, and normally appears as punctual values defined in time, hence it is not common calculate correlation spectra. EEGcorco offers an easy and novel way to calculate correlation spectra by mean the application of the Fast Fourier Transformation (FFT) to digitized EEG signals. Both, correlation and coherence spectra are obtained in both independent frequencies and frequencies grouped in wide bands. Moreover, the program applies parametric statistical analyses to those coherence and correlation spectra also, for each individual frequency and for the frequencies grouped in bands. The program functions on any PC-compatible computer equipped with a Pentium or superior processor and a minimum of 512 Mb of RAM memory (though the higher the capacity the better). The space required on the hard disk depends on the signals to be analyzed, as the output takes the form of files in text format that occupy very little space. The program has been elaborated completely in the Delphi environment for the Windows operating system. The efficacy and versatility of EEGcorco allow it to be easily adapted to different experimental and clinical needs.

关键词： EEG EEG Coherence EEG Correlation

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Electroencephalographic Correlates of Sexual Arousal Induced by Sexually-Explicit Reading in Human Females

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Journal of Behavioral and Brain Science 2018年第11期8卷 599-614页

作者： miguel Angel guevara Carolina Gomez-Navarro Claudia Amezcua-Gutierrez Marisela Hernandez-Gonzalez Anders Agmo Institute of Neuroscience CUCBAUniversity of GuadalajaraGuadalajaraJaliscoMexico Psychology Department Tromso UniversityTromsoNorway

This study explored the cortical functionality in young women while reading a sexually-explicit text. Electroencephalographic activity (EEG) was recorded in heterosexual women while reading either a sexually-explicit text or one with neutral content. Absolute power (AP) and the degree of EEG synchronization among the prefrontal, temporal and parietal cortices were analyzed for the different EEG bands. To evaluate sexual arousal, valence and general activation, Likert-type and Manikin scales were applied. Subjects scored the sexually-explicit text as more pleasurable, and reported greater general activation and sexual arousal than while reading the neutral one. During reading of the sexually-explicit text only, they showed a higher AP in the beta and gamma bands in temporal areas in both hemispheres, and in the theta band in parietal ones, with a lower degree of EEG synchronization between prefronto-temporal areas in the fast bands. Results show that both hemispheres were activated in these sexually-aroused women. The low bilateral synchronization between prefrontal and temporal regions indicates the independent functionality of these cortices, which could be a requirement for inducing and maintaining sexual arousal during reading of sexually-explicit texts in women. These data should broaden our knowledge of the cortical mechanisms that underlie sexual arousal in women.

关键词： Sexual Arousal EEG Sexually-Explicit Reading Erotic Reading Women

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