Effects of anticipation certainty on preparatory brain activity and anticipatory postural adjustments associated with voluntary unilateral arm movement while standing

We examined the effects of anticipation certainty concerning which voluntary movement is required in response to a stimulus while standing on preparatory brain activity and anticipatory postural adjustments (APAs). Ten right-handed adults abducted their left or right arm rapidly in response to a visual imperative stimulus, based on the type of stimulus. A warning cue, which did or did not contain information about the side of arm abduction, was presented 2000ms before the imperative stimulus. Preparatory brain activity before arm abduction was quantified by the mean amplitude of the contingent negative variation 100ms before the imperative stimulus (late CNV amplitude). Compared with the low anticipation condition, in the high anticipation condition the following results were obtained only in the case of right arm abduction: (1) larger late CNV amplitude, (2) earlier postural muscle activities with respect to the focal muscle of arm abduction, and (3) smaller peak displacement of center of pressure during the abduction. These findings suggest that high anticipation of voluntary movement of dominant arm to a stimulus while standing influences preparatory brain activity before the movement, resulting in earlier APAs and thus smaller disturbance of postural equilibrium during the movement.     

Varieties of alexia from fusiform, posterior inferior temporal and posterior occipital gyrus lesions

Reading impairments of three alexia patients, two pure alexia and one alexia with agraphia, due to different lesions were examined quantitatively, using Kanji (Japanese morphogram) words, Kana (Japanese phonetic writing) words and Kana nonwords. Kana nonword reading was impaired in all three patients, suggesting that widespread areas in the affected occipital and occipitotemporal cortices were recruited in reading Kana characters (corresponding to European syllables). In addition, the findings in patient 1 (pure alexia for Kanji and Kana from a fusiform and lateral occipital gyri lesion) and patient 2 (pure alexia for Kana from a posterior occipital gyri lesion) suggested that pure alexia could be divided into two types, i.e. ventromedial type in which whole-word reading, together with letter identification, is primarily impaired because of a disconnection of word-form images from early visual analysis, and posterior type in which letter identification is cardinally impaired. Another type of alexia, alexia with agraphia for Kanji from a posterior inferior temporal cortex lesion (patient 3), results from deficient whole-word images of words per se, and thus should be designated "orthographic alexia with agraphia". To account for these impairments, a weighted dual-route hypothesis for reading is suggested.     

Left or right,that is the question: use of egocentric frame of reference and the right-eye advantage for understanding gestural signs in bottlenose dolphins (Tursiops truncatus)

Animal Cognition - How do bottlenose dolphins visually perceive the space around them? In particular, what cues do they use as a frame of reference for left–right perception? To address this...     

A world between realities: an exploration of therapeutic group culture and transitional phenomena in a long-term psychotherapy group.

In long-term, open-ended psychotherapy groups in which there are inevitable, yet potentially disruptive changes in membership, therapeutic group culture can become particularly important in sustaining a group's sense of cohesion. This article focuses on how transitional phenomena, as defined by D. W. Winnicott, and representational play serve as vehicles for establishing therapeutic group culture in a preadolescent girls' group. Applications of both transitional phenomena and therapeutic group culture to group stage development, as outlined by Garland, Jones, and Kolodny (1970), will also be explored.     

Working Memory for Temporal and Nontemporal Events in Monkeys

This is the first report that introduces appropriate behavioral tasks for monkeys for investigations of working memory for temporal and nontemporal events. Using several behavioral tests, the study also shows how temporal information is coded during retention intervals in the tasks. Each of three monkeys was trained with two working memory tasks: delayed matching-to-sample of stimulus duration (DMS-D) and delayed matching-to-sample of stimulus color (DMS-C). The two tasks employed an identical apparatus and responses and differed only in the temporal and nontemporal attribute of the stimuli to be retained for correct performance. When a retention interval between the sample and comparison stimuli was prolonged, the monkeys made more incorrect responses to short samples in the DMS-C task, suggesting “trace decay” of memory for short stimuli. However, the same monkeys showed no such increase in incorrect responses to short samples in the DMS-D task, suggesting active coding of temporal information, that is, the length of stimulus duration, during the retention interval. When variable lengths of samples were presented with a fixed retention interval, the monkeys made more incorrect responses when length differences between short and long samples were small in the DMS-D task, but not in the DMS-C task. This suggests that the codes of working memory retained in the DMS-D task were not absolute (analogical) but rather were relative (categorical) and related to differences in the duration of the samples.     

Changes in the Frequency of Coworker Incivility: Roles of Work Hours,Workplace Sex Ratio,Supervisor Leadership Style,and Incivility

Previous research has identified individual characteristics that affect experiences of coworker incivility. However, much less is known about environmental characteristics that affect these experiences. Drawing on the social learning theory and the frustration–aggression hypothesis, this study examined the effects of supervisor incivility and work hours on coworker incivility. Data collected from 692 full-time employees showed that changes in the frequency of supervisor incivility positively predicted changes in the frequency of coworker incivility over the next 6-month period. This relationship tended to be stronger for employees who had a supervisor lower rather than higher in the levels of autocratic leadership style. Furthermore, changes in work hours positively predicted changes in coworker incivility. The workplace sex ratio was not an important factor that differentiated experiences of coworker incivility for either men or women. The results of this study highlight the importance of attending to the environmental characteristics of the workplace to understand the occurrence of coworker incivility.