Visual working memory as the substrate for mental rotation

In mental rotation, a mental representation of an object must be rotated while the actual object remains visible. Where is this representation stored while it is being rotated? To answer this question, observers were asked to perform a mental rotation task during the delay interval of a visual working memory task. When the working memory task required the storage of object features, substantial bidirectional interference was observed between the memory and rotation tasks, and the interference increased with the degree of rotation. However, rotation-dependent interference was not observed when a spatial working memory task was used instead of an object working memory task. Thus, the object working memory subsystem—not the spatial working memory subsystem—provides the buffer in which object representations are stored while they undergo mental rotation. More broadly, the nature of the information being stored—not the nature of the operations performed on this information—may determine which subsystem stores the information.     

The effect of the NMDA receptor antagonist MK-801 on the acquisition and extinction of learned fear in the developing rat

Recent findings reveal qualitative developmental differences in extinction of learned fear. The present study explored potential developmental differences in the role of NMDA in acquisition and extinction. Rats were injected with MK-801 prior to fear conditioning or extinction training. Acquisition was found to be NMDA dependent in both age groups, whereas extinction was found to be NMDA dependent in 23-day-old rats, but NMDA independent in 16-day-old rats. These results illustrate another fundamental developmental difference in extinction as well as a dissociation in the role of NMDA in the acquisition and extinction of fear early in development.     

The ameliorating effect of oroxylin A on scopolamine-induced memory impairment in mice

Oroxylin A is a flavonoid and was originally isolated from the root of Scutellaria baicalensis Georgi., one of the most important medicinal herbs in traditional Chinese medicine. The aim of this study was to investigate the ameliorating effects of oroxylin A on memory impairment using the passive avoidance test, the Y-maze test, and the Morris water maze test in mice. Drug-induced amnesia was induced by administering scopolamine (1 mg/kg, i.p.) or diazepam (1 mg/kg, i.p.). Oroxylin A (5 mg/kg) significantly reversed cognitive impairments in mice by passive avoidance and the Y-maze testing (P<.05). Oroxylin A also improved escape latencies in training trials and increased swimming times and distances within the target zone of the Morris water maze (P<.05). Moreover, the ameliorating effects of oroxylin A were antagonized by both muscimol and diazepam (0.25 mg/kg, i.p., respectively), which are GABA(A) receptor agonists. Furthermore, oroxylin A (100 microM) was found to inhibit GABA-induced inward Cl(-) current in a single cortical neuron. These results suggest that oroxylin A may be useful for the treatment of cognitive impairments induced by cholinergic dysfunction via the GABAergic nervous system.     

An Integrative Review of School-Based Mental Health Interventions for Elementary Students: Implications for Occupational Therapy

Occupational therapy for children and youth experiencing mental health conditions is often overlooked in current school-based services, as the traditional role within the system is often limited to physical health issues. The purpose of this integrative review is to investigate current psychosocial interventions within school settings to understand the effects of services provided and to determine potential roles for school-based occupational therapists. The findings of this review support occupational therapists in facilitating interventions that target mental health in school settings. Psychotherapy presented the strongest evidence for reducing psychosocial symptoms in school settings.     

Interplay between Attachment to Peers and Parents in Korean Adolescents’ Behavior Problems

The present study investigated the relative contribution of style of peer attachment (secure, anxious, avoidant) and quality of attachment to parents on behavior problems in Korean adolescents. In addition, we examined the role of paternal and maternal attachment separately as a potential moderator in the relationship between style of peer attachment and internalizing and externalizing behavior problems. Middle school students (245 males, 209 females) completed the Korean version of the Adolescent Friendship Attachment Scale, Inventory of Parental and Peer Attachment-Revised, and Youth Self-Report. Attachment to peers and parents as predictors of behavior problems were tested via hierarchical multiple regression analyses. Results revealed that anxious peer attachment remained the strongest predictor of behavior problems among adolescents (internalizing behavior problems β?=?.18, p?<?.01; externalizing behavior problems β?=?.21, p? <?.001), indicating the relative importance of peer relationship compared to attachment to parents. Paternal attachment significantly moderated the relationship between avoidant peer attachment and externalizing behavior problems (β?=?.15, p?<?.05), even when the main effect of avoidant peer attachment on externalizing behavior problems was not significant. Results highlight the role of both attachments to peers and parents on adolescents’ psychological adjustment.     

Asian Parents’ Perception of Child Weight Status: A Systematic Review

Parental perception of a child’s weight is important in determining parenting and feeding styles, which relate to childhood obesity. Evidence suggests this perception can vary by ethnicity. The purpose of this review was to explore Asian parents’ child weight perception and examine factors related to Asian parents’ child weight misperception. A systematic literature review was conducted on eight studies between 2000 and 2016 through the databases of CINAHL, Cochrane Reviews, PsycINFO, Medline, and PubMed. Searching key words were Asians, Asian-Americans, weight perception, and parents. The review revealed that all eight studies identified child weight misperception, but with highly varying results (ranging from 29.7 to 89.2%). Factors that influenced the accuracy of a parent’s child weight perception included maternal BMI, parental gender and age, child’s BMI, child’s own weight perception, child’s gender and age, and child’s birth order and birth weight. Misperception about their children’s weight is prevalent among Asian parents. Anthropometric measurement of a child, rather than a parent’s reporting of a child’s weight, should be used to educate Asian parents regarding childhood obesity. Health care professionals should be aware of misperceptions when developing and providing a culturally appropriate intervention to address overweight/obesity among Asian children, which might include improving weight perception.     

Longitudinal Intellectual Assessment of Children With HIV Infection

The objective of this paper was to describe the intellectual development of 39 children with HIV infection. The children received serial evaluations over a 10-year period. Thirty-nine children were assessed with age-appropriate intellectual measures at regular intervals as part of their treatment in the HIV Program of a children's hospital. Children showed an 24-point drop in mean Bayley Mental scores over the first 2 years of life. McCarthy scores remained in the low average range from ages 3–5 years. IQ scores were stable by age 6 in the low average range, and unchanged through age 12. Significant changes in memory, vocabulary, and performance subtests were noted. Children with HIV infection demonstrated a significant decline in mental functioning over the first 2 years of life, fell into the low average range by age 3, and remained in the low average range, with subtle changes in some areas.     

Testing hypotheses regarding the causes of comorbidity: examining the underlying deficits of comorbid disorders

The authors examined the validity of a method commonly used to test alternative hypotheses regarding the causes of comorbidity: the examination of underlying deficits of comorbid disorders. The authors simulated data in which the true causes of comorbidity were known, then compared the patterns of underlying deficits of the comorbid disorders found in the simulated data with the predicted results. The method of examining the underlying deficits of comorbid disorders could distinguish between several comorbidity models, including those that could not be distinguished well using other methods. The ability to distinguish the correct model decreased as the sample size and the correlation between the underlying deficits and the symptom scores decreased, suggesting that the issue of power should be considered carefully.     

The role of visual short-term memory in empty cell localization

Three experiments examined the visual memory representation supporting performance at long interstimulus intervals (ISIs) in an empty cell localization task. Two arrays of dots within a 4 x 4 grid were displayed briefly in succession. One grid cell did not contain a dot in either array, and the task was to localize the empty cell. In Experiment 1, we replicated previous findings of recovery to high levels of performance at long ISIs. In Experiment 2, we tested whether figural grouping in visual short-term memory (VSTM) supports long-ISI performance by manipulating the complexity of the array pattern. Pattern complexity had no effect on empty cell localization at 0-msec ISI, suggesting dependence on high-capacity visible persistence, but there was a large simple pattern advantage at long ISIs, suggesting dependence on figural grouping in VSTM. Experiment 3 demonstrated that participants typically remember the empty cells of the first array, and not the dots, for comparison with Array 2.     

Exercise, pain, perceived family support, and quality of life in Korean patients with ankylosing spondylitis

Relations of habitual exercise and pain, perceived family support, and the quality of life in patients with functional class II for ankylosing spondylitis were explored. In a cross-sectional study perceived pain, family support, and quality of life were compared for 30 patients (23 women and 7 men whose mean age was 28.3 yr.+/-8.6 yr.) practicing exercise regularly and for 38 sedentary patients (31 women and 7 men whose mean age was 27.2+/-6.7 yr.). Exercising patients reported significantly lower pain, greater perceived family support, and increased quality of life than their sedentary peers. Pain ratings were significantly negatively correlated with the quality of life in both groups (r = -.26 in exercisers and r = -.50 in sedentary patients) and control group's perceived family support was significantly correlated .44 with quality of life. These results encourage further study of the associations of habitual exercise with perceived pain, family support, and quality of life.