Postural tasks are associated with center of pressure spatial patterns of three-dimensional statokinesigrams in young and elderly healthy subjects

The present study investigated the association between postural tasks and center of pressure spatial patterns of three-dimensional statokinesigrams. Young (n = 35; 27.0 ± 7.7 years) and elderly (n = 38; 67.3 ± 8.7 years) healthy volunteers maintained an undisturbed standing position during postural tasks characterized by combined sensory (vision/no vision) and biomechanical challenges (feet apart/together). A method for the analysis of three-dimensional statokinesigrams based on nonparametric statistics and image-processing analysis was employed. Four patterns of spatial distribution were derived from ankle and hip strategies according to the quantity (single; double; multi) and location (anteroposterior; mediolateral) of high-density regions on three-dimensional statokinesigrams. Significant associations between postural task and spatial pattern were observed (young: gamma = 0.548, p < .001; elderly: gamma = 0.582, p < .001). Robustness analysis revealed small changes related to parameter choices for histogram processing. MANOVA revealed multivariate main effects for postural task [Wilks’ Lambda = 0.245, p < .001] and age [Wilks’ Lambda = 0.308, p < .001], with interaction [Wilks’ Lambda = 0.732, p < .001]. The quantity of high-density regions was positively correlated to stabilogram and statokinesigram variables (p < .05 or lower). In conclusion, postural tasks are associated with center of pressure spatial patterns and are similar in young and elderly healthy volunteers. Single-centered patterns reflected more stable postural conditions and were more frequent with complete visual input and a wide base of support.     

Polyaminergic agents modulate contextual fear extinction in rats

Polyamines, such as spermidine and spermine, have been reported to improve memory retention through the activation of N-methyl-d-aspartate receptors (NMDAr). However whether polyamine agonists and antagonists alter extinction remains unclear. In the current study, we investigated whether spermidine and polyamine antagonists that selectively block the NR2B subunit at the NMDAr alter the extinction of contextual conditioned fear in male Wistar rats. The bilateral intra-hippocampal administration of exogenous spermidine (2 nmol/site) immediately after, but not 6 h after extinction training, facilitated the extinction of fear conditioning. The injection of the NMDAr antagonists arcaine (0.2 nmol/site), ifenprodil (20 nmol/site) and traxoprodil (0.2 nmol/site), disrupted fear extinction and, at doses that had no effect per se, reversed the facilitatory effect of spermidine on fear extinction. These results suggest that exogenous and endogenous polyamines facilitate the extinction of contextual conditioned fear through activation of NR2B subunit-containing NMDAr in the hippocampus. Since extinction-based exposure therapy is widely used as treatment for a number of anxiety-related disorders, including phobias and post-traumatic stress, the currently reported facilitation of extinction by polyaminergic agents suggest these compounds as putative candidates for drug development.     

Elaboration and validation of the athletes Idiocentric and Allocentric Profile Inventory (I-A Profile)

The athlete's psychological profile is one of the most studied areas in sport psychology, but there is no consensus in this area. The purpose of this study was to elaborate and validate a scale to measure and classify athletes into a Idiocentric-Alocentric profile. The method was split in two phases: a) Items elaboration and theoretical model and b) Validation. Qualitative analyses were performed during the first phase and factorial analysis and Cronbach's Alpha were used to validate the instrument. The final instrument was composed by 27 items and the factorial structure showed three factors for Idiocentrism (Self-Realization & Competitiveness, Hedonism, Team Emotional Distance and a second order factor - Idiocentrism Level) and one factor for the Alocentrism (Alocentrism Level). It was concluded that the pattern and consistency of the results indicate that this inventory could be used as a reliable research tool in Brazilian sports context.     

Semantic and phonological information flow in the production lexicon

When speakers produce words, lexical access proceeds through semantic and phonological levels of processing. If phonological processing begins based on partial semantic information, processing is cascaded; otherwise, it is discrete. In standard models of lexical access, semantically processed words exert phonological effects only if processing is cascaded. In 3 experiments, speakers named pictures of objects with homophone names (ball), while auditory distractor words were heard beginning 150 ms prior to picture onset. Distractors speeded picture naming (compared with controls) only when related to the nondepicted meaning of the picture (e.g., dance), exhibiting an early phonological effect, thereby supporting the cascaded prediction. Distractors slowed picture naming when categorically (e.g., frisbee) related to the depicted picture meaning, but not when associatively (e.g., game) related to it. An interactive activation model is presented.     

Is Weiner's attribution‐help model stable across cultures? A test in Brazilian subcultures

The effect of attribution of responsibility on the intention to help is a well‐studied effect. The Weiner model of attribution‐emotion‐help is the main theoretical development to describe the structural relation between these variables. Some research results have suggested that culture influences the relation between model variables. Collectivists tend to show more compassionate emotions independent of attribution of responsibility whereby emotion is no longer a mediator. The present research aims to test the Weiner model in Brazil, a country with established subcultures and clear distinctions in the collectivism–individualism dimension across its regions. An experiment with 1,569 participants from all five Brazilian regions was conducted. Path analysis revealed that more socially oriented participants tended to feel more compassion for the experimental scenario's protagonist, independent of controllability manipulation, decreasing the effect of emotions in the model. These results depict the effect of culture on the model, questioning the stability of the model across cultures.     

Memory for syntax despite amnesia

Syntactic persistence is a tendency for speakers to reproduce sentence structures independently of accompanying meanings, words, or sounds. The memory mechanisms behind syntactic persistence are not fully understood. Although some properties of syntactic persistence suggest a role for procedural memory, current evidence suggests that procedural memory (unlike declarative memory) does not maintain the abstract, relational features that are inherent to syntactic structures. In a study evaluating the contribution of procedural memory to syntactic persistence, patients with anterograde amnesia and matched control speakers reproduced prime sentences with different syntactic structures; reproduced 0, 1, 6, or 10 neutral sentences; then spontaneously described pictures that elicited the primed structures; and finally made recognition judgments for the prime sentences. Amnesic and control speakers showed significant and equivalent syntactic persistence, despite the amnesic speakers' profoundly impaired recognition memory for the primes. Thus, syntax is maintained by procedural-memory mechanisms. This result reveals that procedural memory is capable of supporting abstract, relational knowledge.     

Cognitive inhibition and working memory in attention-deficit/hyperactivity disorder

Studies of cognitive control in attention-deficit/hyperactivity disorder (ADHD) have emphasized the ability to suppress motor responses (i.e., behavioral inhibition) rather than the ability to actively suppress prepotent mental representations (i.e., cognitive inhibition). Further, working memory deficits are suspected in ADHD, yet their distinction from cognitive inhibition is unclear. Two hundred and eighty-eight adolescent and adult participants, 115 of whom met criteria for ADHD and 173 of whom were for non-ADHD comparison, completed a sentence processing task that required the suppression of an incorrect interpretation and a working memory task. The results failed to support cognitive inhibition problems in ADHD. Moreover, the ability to reanalyze sentences with a temporary misinterpretation was at least partially related to working memory performance. The results challenge a unitary inhibition problem in ADHD and suggest inhibition problems do not extend to cognitive suppression in this age range.     

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.