Liberal bias mediates emotion recognition deficits in frontal traumatic brain injury

It is well-known that patients having sustained frontal-lobe traumatic brain injury (TBI) are severely impaired on tests of emotion recognition. Indeed, these patients have significant difficulty recognizing facial expressions of emotion, and such deficits are often associated with decreased social functioning and poor quality of life. As of yet, no studies have examined the response patterns which underlie facial emotion recognition impairment in TBI and which may lend clarity to the interpretation of deficits. Therefore, the present study aimed to characterize response patterns in facial emotion recognition in 14 patients with frontal TBI compared to 22 matched control subjects, using a task which required participants to rate the intensity of each emotion (happiness, sadness, anger, disgust, surprise and fear) of a series of photographs of emotional and neutral faces. Results first confirmed the presence of facial emotion recognition impairment in TBI, and further revealed that patients displayed a liberal bias when rating facial expressions, leading them to associate intense ratings of incorrect emotional labels to sad, disgusted, surprised and fearful facial expressions. These findings are generally in line with prior studies which also report important facial affect recognition deficits in TBI patients, particularly for negative emotions.     

High-resolution electron microscope studies of irradiation-induced crystalline-to-amorphous transition in boron carbide

Abstract

The crystalline-to-amorphous (C-A) transition in boron carbide induced by 2 MeV electron irradiation was studied by high-resolution electron microscopy. It is revealed that the C-A transition takes place not homogeneously but heterogeneously over the irradiated volume and the volume fraction of the amorphous phase continuously increases with increasing dose of electrons.     

邵康节的易学思想

本文以现代日本学者的眼光对邵雍的易学思想作了较为系统的论述。认为邵雍从宇宙观和世界观的理论基础上推演出他的历史观来 ,企图把宇宙世界的生成、万物的存在以及历史的变迁都还原为抽象的数 ,因而一方面难免陷入脱离事实、空洞推演的弊端 ,而在另方面又增加了重视义理以指导人事的内容。所以他的易学思想在古代术数与宋明理学之间 ,起了继往开来的重大作用     

NT-3 facilitates hippocampal plasticity and learning and memory by regulating neurogenesis

In the adult brain, the expression of NT-3 is largely confined to the hippocampal dentate gyrus (DG), an area exhibiting significant neurogenesis. Using a conditional mutant line in which the NT-3 gene is deleted in the brain, we investigated the role of NT-3 in adult neurogenesis, hippocampal plasticity, and memory. Bromodeoxyuridine (BrdU)-labeling experiments demonstrated that differentiation, rather than proliferation, of the neuronal precursor cells (NPCs) was significantly impaired in DG lacking NT-3. Triple labeling for BrdU, the neuronal marker NeuN, and the glial marker GFAP indicated that NT-3 affects the number of newly differentiated neurons, but not glia, in DG. Field recordings revealed a selective impairment in long-term potentiation (LTP) in the lateral, but not medial perforant path-granule neuron synapses. In parallel, the NT-3 mutant mice exhibited deficits in spatial memory tasks. In addition to identifying a novel role for NT-3 in adult NPC differentiation in vivo, our study provides a potential link between neurogenesis, dentate LTP, and spatial memory.     

Influence of rumination and self‐efficacy on depression in Japanese undergraduate nursing students

Researchers have suggested that self‐efficacy can predict and prevent depression, while negative coping strategies, as typified by rumination, can lead to depression. The authors examined the relationship between self‐efficacy, rumination, and depression in Japanese nursing students. The result of a structural equation model showed that rumination, but not self‐efficacy, predicted depression. The result of simultaneous multiple group analysis indicated that there was homogeneity within the same path diagram between genders. The result implied that stress management should focus on controlling the degree of rumination rather than self‐efficacy in order to efficiently maintain the mental health of Japanese nursing students.     

Learning to pause: Fidelity of and biases in the developmental acquisition of gaps in the communicative signals of a songbird

The temporal organization of sounds used in social contexts can provide information about signal function and evoke varying responses in listeners (receivers). For example, music is a universal and learned human behavior that is characterized by different rhythms and tempos that can evoke disparate responses in listeners. Similarly, birdsong is a social behavior in songbirds that is learned during critical periods in development and used to evoke physiological and behavioral responses in receivers. Recent investigations have begun to reveal the breadth of universal patterns in birdsong and their similarities to common patterns in speech and music, but relatively little is known about the degree to which biological predispositions and developmental experiences interact to shape the temporal patterning of birdsong. Here, we investigated how biological predispositions modulate the acquisition and production of an important temporal feature of birdsong, namely the duration of silent pauses (“gaps”) between vocal elements (“syllables”). Through analyses of semi-naturally raised and experimentally tutored zebra finches, we observed that juvenile zebra finches imitate the durations of the silent gaps in their tutor's song. Further, when juveniles were experimentally tutored with stimuli containing a wide range of gap durations, we observed biases in the prevalence and stereotypy of gap durations. Together, these studies demonstrate how biological predispositions and developmental experiences differently affect distinct temporal features of birdsong and highlight similarities in developmental plasticity across birdsong, speech, and music.

Research Highlights

• The temporal organization of learned acoustic patterns can be similar across human cultures and across species, suggesting biological predispositions in acquisition.
• We studied how biological predispositions and developmental experiences affect an important temporal feature of birdsong, namely the duration of silent intervals between vocal elements (“gaps”).
• Semi-naturally and experimentally tutored zebra finches imitated the durations of gaps in their tutor's song and displayed some biases in the learning and production of gap durations and in gap variability.
• These findings in the zebra finch provide parallels with the acquisition of temporal features of speech and music in humans.