Trunk and center of mass movements during gait in children with juvenile idiopathic arthritis

Motion of the body center of mass (CoM) can often indicate the overall effect of the strategy of forward progression used. In the present study, focus is placed on trunk movements in the sagittal, coronal, and transverse/rotation plane, as well as placement of the CoM, during gait in children with juvenile idiopathic arthritis (JIA). Seventeen children with JIA, all with polyarticular lower extremity involvement were examined before and approximately two weeks after treatment with intra-articular cortico-steroid injections. Movement was recorded with a 6-camera 3D motion analysis system in both the children with JIA and in 21 healthy controls. Trunk and center of mass movements were compared between JIA and controls, and effects of intra-articular cortico-steroid treatment were evaluated. Children with JIA were more posteriorly tilted in the trunk, contrary to the common clinical impression, and had their CoM placed more posterior and off-centred, which may have been a result of pain. With such knowledge, it might be possible to better understand the effects of their pain and involvement, and ultimately to plan a treatment strategy for improving their gait patterns.     

Psychometric properties of the Spanish version of the Revised Competitive State Anxiety Inventory-2 with athletes

The aim of this work was to develop a Spanish adaptation of the Revised Competitive State Anxiety Inventory-2. The scale was translated and its psychometric properties were analyzed with data from a sample of 149 athletes. Exploratory and confirmatory factor analyses were performed which supported a 16-item CSAI-2R assessing the three hypothesised dimensions of anxiety: Somatic anxiety, Cognitive anxiety, and Self-confidence. Overall fit of the model was good with a value of .97 for Comparative and Non-Normed Fit Indexes, and .045 for Root Mean Square Error of Approximation. Cronbach alpha coefficients for the factors ranged from .79 to .83. It is concluded that this version shows adequate properties, in terms of its dimensionality and internal consistency. Guidelines are also provided for future research on its validity as a measure of state anxiety in competitive situations.     

Electroencephalographic intercentral interaction as a reflection of normal and pathological human brain activity

The authors summarized EEG findings and defined the nature of the intercentral EEG relationships in different functional states in healthy subjects and patients with organic cerebral pathology, based on a coherence analysis. Similar EEG characteristics in healthy individuals were identified: an anterior-posterior gradient of average coherence levels, the type of cortical-subcortical relationships in anterior cerebral structures. Right- and left-handed individuals showed frequent and regional differences in EEG coherence, which mainly reflected specificity of intracortical relationships. Development and regression of pathology in right-and left-handed individuals with organic brain lesions were thought to be caused by these differences. Lesions of regulatory structures (diencephalic, brain stem and limbic structures) provoked a more diffused kind of changes of intercentral relationships, in contrast to cortical pathology. These changes tended to reciprocate. The dynamic nature of intercentral relationships and their interhemispheric differences was revealed when changing functional states of the brain (increase and decrease of functional level) in healthy individuals and patients with organic cerebral pathology in the process of conscious and psychic activity restoration. Changing activity predominance of certain regulatory structures was considered one of the most important factors determining the dynamic nature of EEG coherence.     

Post-Soviet academia and class power: Belarusian controversy over symbolic markets

The article demonstrates that post-Soviet academic debates about theoretical concepts and visions of truth can be usefully interpreted in terms of different “class positions” of knowledge producers. One academic faction is interested in academic freedom, autonomy, and corporate solidarity, as the social and cultural capitals of its members are involved with the global symbolic market. The capitals of the other group are invested into the slightly modified Soviet academic system and local symbolic fields. Intellectuals necessarily are aligned with more powerful social actors and thus become involved in divisions and struggles that they cannot escape.     

Chicks prefer to peck at insect-like elongated stimuli moving in a direction orthogonal to their longer axis

Spontaneous preferences towards possible prey have been little investigated using targets in motion. Preferences of domestic chicks (Gallus gallus) to peck at video-images of stimuli representing live insects moving along their longer body axis (i.e. “forwards”) or along the shorter body axis (i.e. “sideways”) were investigated. Chicks presented with both types of stimulus displayed a significant preference for pecking at stimuli moving sideways. This preference was already present on day 1 post-hatching, and it strengthened on day 6 for those chicks that had experienced pecking at live insects. Head angles used to fixate the stimuli prior to pecking were also analysed and were consistent (i.e. 30°–35° and 60°–65°) with those reported for fixation of non-edible targets (larger stimuli at a distance). In a first control experiment the same video-presented stimuli were used but the insect’s legs were removed to reduce flickering. In a second control experiment, paper-printed images of the whole insect were used. In both cases, the sideways direction of movement was clearly preferred. Overall, our data show that chicks have a spontaneous preference to peck at video-images resembling live insects moving along their shorter body axis. Sideways movement may constitute a crucial signal attracting chicks’ attention and enhancing predatory responses possibly because of stronger stimulation of motion detectors.     

Mom’s shadow: structure-from-motion in newly hatched chicks as revealed by an imprinting procedure

The ability to recognize three-dimensional objects from two-dimensional (2-D) displays was investigated in domestic chicks, focusing on the role of the object’s motion. In Experiment 1 newly hatched chicks, imprinted on a three-dimensional (3-D) object, were allowed to choose between the shadows of the familiar object and of an object never seen before. In Experiments 2 and 3 random-dot displays were used to produce the perception of a solid shape only when set in motion. Overall, the results showed that domestic chicks were able to recognize familiar shapes from 2-D motion stimuli. It is likely that similar general mechanisms underlying the perception of structure-from-motion and the extraction of 3-D information are shared by humans and animals. The present data shows that they occur similarly in birds as known for mammals, two separate vertebrate classes; this possibly indicates a common phylogenetic origin of these processes.     

The Ethical Interest of Frankenstein; Or,the Modern Prometheus: A Literature Review 200 Years After Its Publication

Science and Engineering Ethics - Two hundred years after it was first published, Mary Shelley’s Frankenstein; or, the modern Prometheus remains relevant. This novel has endured because of its...     

A beluga whale socialized with bottlenose dolphins imitates their whistles

The research on imitation in the animal kingdom has more than a century-long history. A specific kind of imitation, auditory–vocal imitation, is well known in birds, especially among songbirds and parrots, but data for mammals are limited to elephants, marine mammals, and humans. Cetaceans are reported to imitate various signals, including species–specific calls, artificial sounds, and even vocalizations from other species if they share the same habitat. Here we describe the changes in the vocal repertoire of a beluga whale that was housed with a group of bottlenose dolphins. Two months after the beluga’s introduction into a new facility, we found that it began to imitate whistles of the dolphins, whereas one type of its own calls seemed to disappear. The case reported here may be considered as an interesting phenomenon of vocal accommodation to new social companions and cross-species socialization in cetaceans.     

Psychological and Sociocultural Adaptation of Children Adopted from Russia and their Associations with Pre-Adoption Risk Factors and Parenting

We investigated academic and behavioral outcomes of internationally adopted children and the associations between these outcomes and age at adoption, time spent in the adoptive family, and parenting. At two time points (T1 and T2, ~15 months apart), we examined early academic skills (school readiness), and parent-reported behavioral adjustment (internalizing and externalizing behavior) and adaptive functioning of a sample of 75 children (45.9% boys, mean age?=?5.17 years) adopted from Russia into US families. We also collected parents’ self-assessments of their parenting at T1. Children who were adopted at a younger age showed higher levels of early academic skills. Correlations between age at adoption and other outcomes were overall small and mostly non-significant. However, adoptees’ academic and behavioral progress differed notably in several respects. Specifically, adoptees improved in early academic skills over time, whereas, as a group, their adaptive functioning and behavioral adjustment remained stable within the normal range. Early academic skills were not related to behavioral adjustment at each time point and over time. The time spent in the adoptive family was positively related to early academic skills at T2. Whereas outcomes showed little to no relation to parenting as reported by mother and father separately, higher discrepancies between mothers' and fathers' reports of positive parenting were related to higher levels of behavioral symptoms and lower levels of adaptive skills at T2. These differential results may be explained in part by drawing upon the notion of dissociated domains of psychological and sociocultural adaptation and acculturation, outlined in the immigration literature. These results also bring to light the possible importance of between-parent consistency in parenting for adoptees’ behavioral outcomes.