Intrahippocampal insulin improves memory in a passive-avoidance task in male wistar rats

The main impacts of insulin favor the peripheral organs. Although it functions as a neuropeptide, insulin possesses also some central effects. The aim of this study was to determine the effect of intrahippocampal infusion of insulin on passive avoidance learning in healthy male rats. Thirty male wistar rats were divided into three groups (n=10 each). The experimental group had posttraining insulin infusion into the CA1 region of dorsal hippocampus, after which they were compared with sham (saline) and control (intact) groups. Insulin treated animals had greater latency to enter the dark compartment in compare with saline treated (p=0.023) or control groups (p=0.017). Upon our results, we concluded that intrahippocampal injections of insulin may enhance memory for a simple learning task which supports the concept that insulin possibly plays an endogenous role in memory formation.     

Voluntary exercise ameliorates cognitive deficits in morphine dependent rats: the role of hippocampal brain-derived neurotrophic factor

Chronic exposure to opiates impairs spatial learning and memory. Given the well-known beneficial effects of voluntary exercise on cognitive functions, we investigated whether voluntary exercise would ameliorate the cognitive deficits that are induced by morphine dependence. If an effect of exercise was observed, we aimed to investigate the possible role of hippocampal brain-derived neurotrophic factor (BDNF) in the exercise-induced enhancement of learning and memory in morphine-dependent rats. The rats were injected with bi-daily doses (10mg/kg, at 12h intervals) of morphine over a period of 10 days of voluntary exercise. Following these injections, a water maze task was performed twice a day for five consecutive days, followed by a probe trial 2 days later. A specific BDNF inhibitor (TrkB-IgG chimera) was used to block the hippocampal BDNF action during the 10 days of voluntary exercise. We found that voluntary exercise blocked the ability of chronic morphine to impair spatial memory retention. A blockade of the BDNF action blunted the exercise-induced improvement of spatial memory in the dependent rats. Moreover, the voluntary exercise diminished the severity of the rats' dependency on morphine. This study demonstrates that voluntary exercise ameliorates, via a TrkB-mediated mechanism, the cognitive deficits that are induced by chronic morphine. Thus, voluntary exercise might be a potential method to ameliorate some of the deleterious behavioral consequences of the abuse of morphine and other opiates.     

Rethinking citizenship rights of non‐Muslims in an Islamic state: Rashid al‐Ghannūshi's contribution to the evolving debate

Of interest to Islamists of the twentieth century has been the question of minority rights in an Islamic state and of how non‐Muslim minorities should be treated: in particular, should they enjoy equal citizenship rights and responsibilities with Muslims? Traditional Islamic law did not accord equal rights to non‐Muslim protected minorities (ahl al‐dhimma), placing Muslims above them in several key areas. Notwithstanding the law, however, early Muslim rulers exercised some pragmatic discretion according to the imperatives of their day. With the Islamic revival of the twentieth century, the traditional view has been adopted by several Muslim thinkers and leaders, though the traditional view is at odds with the concept of the nation‐state. The nation‐state is built on a secular premise, with no single religious group favoured over another. Within this context, a number of Muslim thinkers have attempted to reinterpret the traditionally held view of ‘citizenship rights’. This article will focus on the contribution of one such thinker, the Tunisian Islamist Rashid al‐Ghannūshi, who espouses somewhat ‘liberal’ views on the issue and argues for rethinking on a number of related aspects. Commencing with some background to the problem, the article explores the issue of citizenship rights as espoused by Ghannūshi, and notes the key importance of the concept of justice as their basis, in his view. Specific rights examined are: freedom of belief, including for Muslims who wish to change their religion; the holding of public office by non‐Muslims; equal treatment for Muslims and non‐Muslims in terms of fiscal duties and benefits. Throughout his arguments, Ghannūshi emphasizes justice as central to the issue, and as the basis of interpreting and developing related rules and laws. Although Ghannūshi's views are not entirely new, he goes well beyond what has been acceptable in Islamic law, and his contribution should be considered important in the efforts at rethinking Islamic law in this area.     

The Protective Influence of Relationship Commitment on the Effects of Facebook Addiction on Marital Disaffection

Abstract

Previous research has suggested that Facebook use can lead to adverse romantic relationship outcomes due to interpersonal conflicts, interactions with potential romantic alternatives, and jealousy. However, these associations have been explored mainly with undergraduates, focusing primarily on conflict rather than emotional disengagement. The current study examined the associations between Facebook addiction and marital disaffection (e.g., loss of love, emotional disengagement) amongst 138 (95 females and 43 males) cohabiting married Facebook users residing in the United States. The results revealed that Facebook addiction and marital disaffection were positively related, even after controlling for relationship commitment. Additionally, greater relationship commitment weakened the association between Facebook addiction and marital disaffection. There are likely multiple explanations for the current findings; however, results suggest that higher levels of relationship commitment may protect spouses against the negative relationship outcomes associated with Facebook addiction. Future longitudinal work with couples is needed to clarify the directionality of the relationship between Facebook addiction and marital disaffection.     

L2 Reading Strategies Used by Iranian EFL Learners: A Think-Aloud Study

This study investigated the differences in the type and frequency of strategy use by four proficient and four less-proficient readers. Thirty female senior undergraduates majoring in TEFL at a university in Iran were given a reading comprehension test. Based on the results of their reading test, eight were chosen based on a nonrandom purposive sampling technique to take part in the study. They were required to read an expository text in English (L2) and at the same time think aloud. The strategies that emerged from the think-aloud protocols were coded and categorized based on Oxford's (1990) taxonomy of language learning strategies.     

Soccer Hooliganism in Iran: A Test of Agnew’s General Strain Theory

Fan aggression (verbal and physical) at sporting events is seemingly becoming increasingly more prevalent, so much so that that one form has been coined as “soccer hooliganism.” Although an emergent area of social and criminological inquiry, few studies have attempted to predict or explain this behavior through a theoretical lens. The present study applies Agnew’s general strain theory to self-reported data on Iranian soccer fans’ verbal and physically aggressive behaviors. The results of both hierarchical multiple regression analyses and structural equation modeling reveal solid support for Agnew’s theory. As expected, strains are both directly and indirectly (via negative affect) associated with fan aggression. Moreover, the effects of strain on fan aggression are also conditioned by both self-control and social support, but less so by criminal peer associations. Finally, although the data support Agnew’s theory with regard to deviant fan aggression, they do not support his theory with regard to conventional coping strategies; conventional coping is inversely associated with strain.     

The effect of childhood bilingualism on episodic and semantic memory tasks

Kormi-Nouri, Moniri and Nilsson (2003) demonstrated that Swedish-Persian bilingual children recalled at a higher level than Swedish monolingual children, when they were tested using Swedish materials. The present study was designed to examine the bilingual advantage of children who use different languages in their everyday life but have the same cultural background and live in their communities in the same way as monolingual children. In four experiments, 488 monolingual and bilingual children were compared with regard to episodic and semantic memory tasks. In experiments 1 and 2 there were 144 boys and 144 girls in three school groups (aged 9-10 years, 13-14 years and 16-17 years) and in three language groups (Persian monolingual, Turkish-Persian bilingual, and Kurdish-Persian bilingual). In experiments 3 and 4, there were 200 male students in two school groups (aged 9-10 years and 16-17 years) and in two language groups (Persian monolingual and Turkish-Persian bilingual). In the episodic memory task, children learned sentences (experiments 1-3) and words (Experiment 4). Letter and category fluency tests were used as measures of semantic memory. To change cognitive demands in memory tasks, in Experiment 1, the integration of nouns and verbs within sentences was manipulated by the level of association between verb and noun in each sentence. At retrieval, a recognition test was used. In experiments 2 and 3, the organization between sentences was manipulated at encoding in Experiment 2 and at both encoding and retrieval in Experiment 3 through the use of categories among the objects. At retrieval, free recall or cued recall tests were employed. In Experiment 4, the bilingual children were tested with regard to both their first and their second language. In all four experiments, a positive effect of bilingualism was found on episodic and semantic memory tasks; the effect was more pronounced for older than younger children. The bilingual advantage was not affected by changing cognitive demands or by using first/second language in memory tasks. The present findings support the cross-language interactivity hypothesis of bilingual advantage.     

Ijtihad and innovation in neo‐modernist Islamic thought in Indonesia

This article briefly explores three models of ijtihad followed in contemporary Islam: text‐based, eclectic and context‐based ijtihad, and attempts to sketch the features of the environment within which each model functions. The key aim of the article, however, is to examine the context‐based model of ijtihad which is utilized by the neo‐Modernist Muslims in Indonesia, to identify a number of their major concerns and to highlight the nature of the reform agenda the neo‐Modernists are pursuing. Though this agenda may be seen by many Muslims to be problematic and even dangerous, it is gaining ground in Indonesia, particularly within the younger generation who have had the opportunity of combining traditional Islamic scholarship with modern Western education. The article examines these issues of interest on the basis of interviews conducted during 1995 in Jakarta with two leading Muslim intellectuals: Nurcholish Majid, the leading neo‐Modernist thinker, and Abdurrahman Wahid, the leader of the largest Islamic organization in Indonesia, Nahdlatul Ulama.