Microinfusions of flumazenil into the basolateral but not the central nucleus of the amygdala enhance memory consolidation in rats.

Extensive evidence indicates that benzodiazepine receptors in the amygdala are involved in regulating memory consolidation. Recent findings indicate that many other drugs and hormones influence memory through selective activation of the basolateral amygdala nucleus (BLA). This experiment examined whether the memory-modulatory effect of flumazenil, a benzodiazepine receptor antagonist, selectively involves the BLA. Bilateral microinfusions of flumazenil (12 nmol in 0.2 microl) into the BLA of rats administered immediately after training in an inhibitory avoidance task significantly enhanced 48-h retention performance whereas infusions into the central nucleus were ineffective. These findings indicate that the BLA is selectively involved in mediating flumazenil's influence on memory storage and are thus consistent with extensive evidence indicating that the BLA is involved in regulating memory consolidation.     

Parents’ Positive Interpersonal Coping After a Child’s Death

Despite the challenging context of grieving for the death of a child, evidence shows that it is possible for parents to manage and preserve their relationship. The aim of this study was to examine parents’ perceptions of positive interpersonal coping processes that helped their relationship after the death of their child. Individual semi-structured interviews with 17 bereaved maritally committed parents were conducted. The interview guide included questions covering themes such as parents’ coping together, relationship strengths and mutual support. Data were analyzed through constructivist grounded theory methods. Three main themes were identified: search for meaning (reframing of partners’ different coping processes and the changes/difficulties in the relationship, and development of shared beliefs); communication with the partner (direct and indirect feedback, and mutual learning); and care-in-relation (caring for the partner and the relationship). Dyad-level interventions should aim at promoting mutual empathy, development of shared appraisals, and the identification and consideration of each other’s boundaries.     

Me and my 400 friends: the anatomy of college students' Facebook networks, their communication patterns, and well-being

Is there a trade-off between having large networks of social connections on social networking sites such as Facebook and the development of intimacy and social support among today's generation of emerging adults? To understand the socialization context of Facebook during the transition to adulthood, an online survey was distributed to college students at a large urban university; participants answered questions about their relationships by systematically sampling their Facebook contacts while viewing their Facebook profiles online. Results confirmed that Facebook facilitates expansive social networks that grow disproportionately through distant kinds of relationship (acquaintances and activity connections), while also expanding the number of close relationships and stranger relationships, albeit at slower rates. Those with larger networks estimated that larger numbers of contacts in their networks were observing their status updates, a form of public communication to one's entire contact list. The major function of status updates was emotional disclosure, the key feature of intimacy. This finding indicates the transformation of the nature of intimacy in the environment of a social network site. In addition, larger networks and larger estimated audiences predicted higher levels of life satisfaction and perceived social support on Facebook. These findings emphasize the psychological importance of audience in the Facebook environment. Findings also suggest that social networking sites help youth to satisfy enduring human psychosocial needs for permanent relations in a geographically mobile world--college students with higher proportions of maintained contacts from the past (primarily high school friends) perceived Facebook as a more useful tool for procuring social support.     

Online racial discrimination and the protective function of ethnic identity and self-esteem for African American adolescents

A growing body of literature has shown that being victimized online is associated with poor mental health. Little is known about the factors that protect youth from the negative outcomes that may result from these victimization experiences, particularly those related to race. Using a risk and resilience framework, this study examined the protective function of ethnic identity and self-esteem among African Americans who experience online racial discrimination. For the sample of 125 adolescents, hierarchical regression results revealed that higher levels of ethnic identity and self-esteem significantly moderated the negative impact of online racial discrimination on anxiety levels. These findings show that ethnic identity and self-esteem can buffer the negative mental health outcomes associated with online racial discrimination, at least with respect to adolescents' anxiety. Findings from the current study have significant implications for adolescent adjustment given the increased time youth spend doing online activities.     

Body checking and associated cognitions among Brazilian outpatients with eating disorders and nonpsychiatric controls

This work aims to compare in patients with anorexia nervosa, bulimia nervosa, and control subjects: (a) body checking types, frequency, and parts; (b) prevalence of body avoidance and the most checked body parts; (c) body checking cognitions. Eighty-five outpatients with eating disorders (ED) and 40 controls filled out validated body checking and cognition questionnaires. ED patients, especially bulimia nervosa, check their bodies more than do the control subjects. The most checked area was the belly. The most frequent means of body checking was mirror checking, while the most avoided was weighing. The reasons that participants in the various study groups check their bodies seem to differ. Given the importance of body checking in the etiology and maintenance of EDs, it is important that clinicians consider this behavior, as well as the factors that lead to checking/avoidance in the different eating disorder subtypes, so that treatment may be more specific.     

‘We Are All the Same,We All Are Mestizos’: Imagined Populations and Nations in Genetics Research in Colombia

In Colombia, as in other Latin American countries, current population genetics research is based on the understanding that Colombians constitute a mestizo nation, given the admixture process that took place between Africans, Amerindians, and Europeans during colonial times. The mestizo is a pervasive category used by geneticists to conduct, organise, and publish research studies that deal with the continent's peopling process and the genetic makeup of its contemporary population(s). It is also the dominant imaginary for the Colombian population and a key nation-building ideology. By tracing how this category moves and is used across four Colombian genetics laboratories, it is possible to discern that despite its apparently clear-cut boundaries, the mestizo is contingent, contested, and flexible, allowing for multiple understandings and usages. This flexibility and multiplicity are visible in the quantification of genetic ancestry, the divisions of geographical location, and the understanding of gender. Such understandings allow one to think about a homogeneous nation (inclusive) that is simultaneously heterogeneous (exclusive); they provide multiple but not necessarily contradictory possibilities of being mestizo, allowing the coexistence of images of the nation that could otherwise seem contradictory; and they permit navigation around contested terms such as race, while simultaneously thinking of mixed races or racialised individuals. Finally, these flexible and multiple constructions of the mestizo (re)produce various subjects as ‘other’, whether they are women, the Indigenous, the black/dark, or the poor.