effects of Fifa 2015 computer games on changes in cognitive, hormonal and brain waves functions of young men volunteers

Introduction: Computer games have attracted remarkable attentions in general publics with different cultures and their effects are subject of research by cognitive neuroscientists. In the present study, possible effects of the game Fifa 2015 on cognitive performance, hormonal levels, and electroencephalographic [EEG] signals were evaluated in young male volunteers

Methods: Thirty two subjects aged 20 years on average participated mutually in playing computer game Fifa 2015. Identification information and general knowledge about the game were collected. Saliva samples from the contestants were obtained before and after the competition. Perceptive and cognitive performance including the general cognitive health, response delay, attention maintenance, and mental fatigue were measured using PASAT test. EEG were recorded during the play using EEG device and analyzed later using QEEG. Simultaneously, the players' behavior were recorded using a video camera. Saliva cortisol levels were assessed by ELISA kit. Data were analyzed by SPSS program

Results: The impact of playing computer games on cortisol concentration of saliva before and after the game showed that the amount of saliva plasma after playing the game has dropped significantly. Also the impact of playing computer games on mental health, before and after the game indicated that the number of correct answers has not changed significantly. This indicates that sustained attention has increased in participants after the game in comparison with before that. Also it is shown that mental fatigue measured by PASAT test, did not changed significantly after the game in comparison to before that. The impact of game on changes in brain waves showed that the subjects in high activity state during playing the game had higher power of the EEG signals in most of the channels in lower frequency bands in compared to normal state

Discussion: The present study showed that computer games can positively affect the stress system and the perceptual-cognitive system. Even though this impact was not significant in most cases, the changes in cognitive and hormonal test and also in brain waves were visible. Hence, due to the importance of this matter, it is necessary to create control systems in selecting the types of games for playing

Identification of morphine accumulation in the rat embryo central nervous system: a C14-morphine administration study

Previous studies have shown that morphine consumption during pregnancy may cause delay or defect of embryo development or abnormal nervous system function in the human and animal models. In the present study, the highest density of morphine accumulation in the central nervous system of rat embryos was evaluated using C14-morphine. Female Wistar rats [W 170-200 g] used and were crossed with male rats and coupling time was recorded [Embryonic day 0-E0]. Experimental groups received 0.05 mg/ml of C14-morphine in drinking water daily. On the 10[th] and 17[th] days of pregnancy, pregnant rats were anesthetized and the embryos with these uterus and placenta were surgically removed and were fixed in formalin 10% for 4 week. Then the embryos were processed, sectioned in 25 micro m and 5 micro m thicknesses, fixed on the glasses for further evaluations. The sectioned in 25, the glasses were fixed on the Blanc black and white film for 6 h. Then, the films were appeared and their negatives were prepared. The sectioned in five staining hematoxylin and eosin by light microscope and MOTIC software. Our results indicated that the highest C14-morphine accumulation was observed in the vesicles and the ventricular choroid plexus [CP] of [E17] embryos, whereas, in the [E10] embryos. Highest concentration was observed in the brain vesicles and the ventricular CP. In addition, this study showed the surface area of lateral, 3[rd] and 4[th] ventricular CP in the experimental groups were increased in compared to control groups. Our results indicated that effects of morphine on reduction of embryos brain development may be due to the highest accumulation of C14-morphine in the CP and brain vesicles

Oral morphine consumption reduces lens development in rat embryos

Consumption of morphine, during pregnancy, in addition to inducing defects in the mother's nervous system function, caused defects or delays in the formation and evolution of embryonic visual system. In the present study, changes in lens development were assessed in embryos exposed to morphine in utero. Female Wistar rats [250-300 g] were mated with male rats and pregnancy was determined by sperm observation in vaginal smear. This day was considered as embryonic day zero [E0]. The females were then divided randomly into the experimental and the control groups. The control group received tap water and the experimental group received morphine [0.05 mg/ml] in their water. On embryonic day 13 [E13], blood samples were collected from the retro-orbital sinus of all animals for plasma corticosterone detection. On embryonic day 17[E17], the animals were killed by an overdose of chloroform and the embryos were taken out surgically. The embryos were fixed in 10% formalin for 30 days. At this time, the head of the embryos were removed for tissue processing and Hematoxylin- Eosin [HandE] staining. The samples were evaluated using light microscope and MOTIC software. Our data indicated that plasma corticosterone level was dramatically increased and the lens was thinner in the experimental group. [Although the proliferation of lens cells increased in the experiment group but that lens had delay in removing the proliferated and elongation cells with abnormal density in the lateral part of the lens in comparison with the control group]. Moreover, the opening of the eyelids was delayed in the off springs of the mothers who received morphine. This study showed that morphine consumption during pregnancy leads to defects in fetal visual system development, particularly in the lens, and eyelids

Identification of site of morphine action in pregnant wistar rat placenta tissue: a C[14]-morphine study

In previous studies it has been emphasized that the site of morphine action may be either in the embryo or the placenta. In the present study, we attempt to identify the site of morphine action on the fetal section of Wistar rat placenta by using C14-morphine. In this study [experimental], female Wistar rats [weights: 170-200 g] were mated with male rats and their coupling times recorded. Experimental groups received daily doses of 0.05 mg/ml of C14-morphine in their drinking water. On the 9[th] and 14[th] embryonic days, the pregnant rats were anesthetized and the placenta and uterus surgically removed. Placentas were fixed in 10% formalin for two weeks, then processed, sectioned in 5 micro m and 25 micro m thicknesses, and fixed on glass slides for further evaluation. The 25 micro m sections were delivered to black and white film for three days. Films were processed and evaluated with a digital inverse microscope for possible radiological impression. The 5 micro m sections were processed for hematoxylin and eosin [H and E] staining, and evaluated by light microscope and MOTIC software. Our results indicated that the site of action of C14-morphine was possibly located on the blood plexus of the fetal portion of the placenta. In addition, oral morphine consumption was shown to inhibit fetal and maternal placental development in the experimental groups. We conclude that morphine's effectiveness on the reduction of embryo growth and development may be via its effects on the blood plexus of the fetal section of the placenta

Effect of oral morphine consumption in female rats on development of brain cavities, central canal and choroid plexus of their embryos

Previous studies have shown that morphine consumption during pregnancy may delay embryo development or cause abnormal nervous system function. The present study focused on the effects of maternal morphine consumption on brain cavities and central canal development in Wistar rats. In this study Wistar rats [average weight: 170-200 g] were used. The experimental group, after pregnancy, received 0.05 mg/ml of morphine by tap water while the control group received water. On the 17[th] day of pregnancy, the pregnant animals were anesthetized by chloroform and embryos were surgically removed. The samples were fixed in 10% formalin for four weeks. Then, tissues were processed and sectioned. Sections were stained with hematoxylin and eosin [H and E] and examined for ventricle, central canal and choroid plexus development by light microscopy and MOTIC software. Severe reductions of the third and lateral ventricles were observed in the experimental group. In addition, an increase in the choroid plexus [CP] area in the experimental group with regards to the control group was identified. The study showed that oral morphine consumption lead to reduction in the third and lateral brain cavities and an increase in the CP area. This defect may cause behavioral changes observed in the F1 generation from addicted pregnant animals

effect of morphine consumption on plasma corticosteron concentration and placenta development in pregnant rats

Previous studies have shown that morphine consumption during pregnancy may delay embryo development or cause abnormal nervous system function. The present study focused on the effect of maternal morphine consumption on development of placenta and blood corticosteron concentration in addictive pregnant mothers. 24 female rats, 170-200g weight, were used. The experimental groups after pregnancy received an oral dose of 0.05 mg/ml of morphine by tap water while the control group received only tap water. On 10[th] and 14[th] day of pregnancy, rats were anesthetized and placenta removed surgically, 1ml blood was collected from each pregnant mother from retro-orbital sinus, the concentration of blood corticosteron was determined by corticosteron Elisa kit after centrifugation. The fixed tissue was processed, sectioned and stained with hematoxylin and eosin. Placenta was studied microscopically according to the thickness of layers, area of blood cisterns, and the number of cells. Comparing the plasma corticosteron concentration of the treatment and the control groups, not only a severe increase in the treatment group was detected, but also the thickness of maternal and embryonic portions of the placenta at day 10th and 14th of gestation was different significantly [p

Effects of oral morphine on the larvae, pupae and imago development in drosophila melanogaster

Previous studies, focusing on the effects of abused drugs, have used mice or rats as the main animal models; the present study tries to introduce a simple animal model. For this propose, we investigated the effects of oral morphine consumption by parents on the development of larvae, pupae and imago in Drosophila Melanogaster [D. Melanogaster]. In this experimental study, twenty male and 20 female D. Melanogaster pupae were housed in test tubes with banana [5 pupae /tube]. Male and female groups each were divided into three experimental group and one control group, which were maintained at 25 [degree sign] C. Morphine [0.2, 0.02, 0.002 mg/ml] was added into the test tubes of the experimental groups. The control group maintained at morphine-free test tube. The male and female groups with the same treatment were coupled and then female fertilization, egg deposit, larval, pupae and imago stages were studied macro and microscopically. The SPSS software [version 9.01] was used for statistical evaluations. In the experimental groups, in the larvae stage, both increase and decrease of length and surface area in the pupae stage were observed. The number of larvae pupae, and imago was reduced in the experimental groups. The study showed that oral morphine consumption by parents may affect the development of larvae, pupation and imago stages in D. Melanogaster. The results also showed that D. Melanogaster may be a reliable animal model to study on the concerns about abused drugs especially those with opioids