The impact of poverty and socioeconomic status on brain, behaviour, and development: a unified framework.

In this article, we, for the first time, provide a comprehensive overview and unified framework of the impact of poverty and low socioeconomic status (SES) on the brain and behaviour. While there are many studies on the impact of low SES on the brain (including cortex, hippocampus, amygdala, and even neurotransmitters) and behaviours (including educational attainment, language development, development of psychopathological disorders), prior studies did not integrate behavioural, educational, and neural findings in one framework. Here, we argue that the impact of poverty and low SES on the brain and behaviour are interrelated. Specifically, based on prior studies, due to a lack of resources, poverty and low SES are associated with poor nutrition, high levels of stress in caregivers and their children, and exposure to socio-environmental hazards. These psychological and physical injuries impact the normal development of several brain areas and neurotransmitters. Impaired functioning of the amygdala can lead to the development of psychopathological disorders, while impaired hippocampus and cortex functions are associated with a delay in learning and language development as well as poor academic performance. This in turn perpetuates poverty in children, leading to a vicious cycle of poverty and psychological/physical impairments. In addition to providing economic aid to economically disadvantaged families, interventions should aim to tackle neural abnormalities caused by poverty and low SES in early childhood. Importantly, acknowledging brain abnormalities due to poverty in early childhood can help increase economic equity. In the current study, we provide a comprehensive list of future studies to help understand the impact of poverty on the brain.

Common Neuropsychiatric S ymptoms in Alzheimer's Disease, Mild Cognitive Impairment, and Subjective Memory Complaints: A Unified Framework.

The Alzheimer's disease (AD) continuum is a unique spectrum of cognitive impairment that typically involves the stages of subjective memory complaints (SMC), mild cognitive impairment (MCI), and AD dementia. Neuropsychiatric symptoms (NPS), such as apathy, anxiety, stress, and depression, are highly common throughout the AD continuum. However, there is a dearth of research on how these NPS vary across the AD continuum, especially SMC. There is also disagreement on the effects of specific NPS on each stage of the AD continuum due to their collinearity with other NPS, cognitive decline, and environmental factors (e.g., stress). In this article, we conduct a novel perspective review of the scientific literature to understand the presence of NPS across the AD continuum. Specifically, we review the effects of apathy, depression, anxiety, and stress in AD, MCI, and SMC. We then build on this knowledge by proposing two theories of NPS' occurrence across the AD continuum. Consequently, we highlight the current landscape, limitations (e.g., differing operationalization), and contentions surrounding the NPS literature. We also outline theories that could clear up contention and inspire future NPS research.

Effect of APOE4 Allele and Gender on the Rate of Atrophy in the Hippocampus, Entorhinal Cortex, and Fusiform Gyrus in Alzheimer's Disease.

BACKGROUND: The hippocampus, entorhinal cortex, and fusiform gyrus are brain areas that deteriorate during early-stage Alzheimer's disease (AD). The ApoE4 allele has been identified as a risk factor for AD development, is linked to an increase in the aggregation of amyloid ß (Aß) plaques in the brain, and is responsible for atrophy of the hippocampal area. However, to our knowledge, the rate of deterioration over time in individuals with AD, with or without the ApoE4 allele, has not been investigated. METHOD: In this study, we, for the first time, analyze atrophy in these brain structures in AD patients with and without the ApoE4 using the Alzheimer's Disease Neuroimaging Initiative (ADNI) dataset. RESULTS: It was found that the rate of decrease in the volume of these brain areas over 12 months was related to the presence of ApoE4. Further, we found that neural atrophy was not different for female and male patients, unlike prior studies, suggesting that the presence of ApoE4 is not linked to the gender difference in AD. CONCLUSION: Our results confirm and extend previous findings, showing that the ApoE4 allele gradually impacts brain regions impacted by AD.

Social support, psychological flexibility and coping mediate the association between COVID-19 related stress exposure and psychological distress.

The COVID-19 pandemic has contributed to an increase in psychological distress. However, protective factors such as social support, psychological flexibility, and coping mechanisms can help individuals cope with the effects of psychological distress. This study aimed to test a recent hypothesis suggesting that psychological flexibility is not necessarily a coping strategy but a mechanism that can influence the coping strategies an individual employs during stressful events. We tested a mediation model that COVID-19 concerns would contribute to higher levels of perceived social support, which would directly increase psychological flexibility, and finally test if the effect of psychological flexibility on distress was mediated by approach and avoidant coping strategies. The results show that social support facilitates higher levels of psychological flexibility. Further, that psychological flexibility indirectly reduces psychological distress by reducing avoidant coping and increasing approach coping strategies. Within the context of COVID-19, we have shown the importance of social support and psychological flexibility for reducing distress. We have provided further evidence that psychological flexibility might not be a coping mechanism but a strategy that leads individuals to engage in more approach coping strategies and fewer avoidant coping strategies.

Developing and validating a university needs instrument to measure the psychosocial needs of university students.

BACKGROUND: University students are four times more likely to experience elevated levels of psychological distress compared to their peers. The psychosocial needs of university students are associated with high psychological distress, stressful life events, and academic performance. Our study focuses on developing a measure to help universities identify these psychosocial needs. AIMS: The study aimed to develop and validate the factor structure of the University Needs Instrument and identify the relationship between psychosocial needs, psychological distress and academic performance among university students. SAMPLE: Undergraduate university students (N = 511) currently studying at university. METHOD: Participants completed demographic questions, the University Needs Instrument and the Kessler-10 Psychological Distress scale. The University Needs Instrument comprises 30 items within six psychosocial factors (academic support, financial support, support from family, support from friends, practical support and emotional support), each consisting of five items. RESULTS: Confirmatory factor analysis showed that all items significantly loaded on the six hypothesized factors. The hypothesized model was supported by the data displaying excellent model fit and psychometric properties. Our analysis determined that the UNI has strong internal consistency. The results also confirmed that university students' high levels of psychological distress and their academic performance may be affected by their psychosocial needs. CONCLUSIONS: Our findings have provided an initial validation of the UNI to help screen and identify the psychosocial needs of university students. This scale can be used to identify the appropriate psychosocial support that can be offered to students and in turn could help reduce their psychological distress, improve their psychosocial well-being and increase academic performance.

Suicide Risk among Older Adults: The Moderating Role of Hope.

OBJECTIVES: The current study investigated whether hope and its two components (agency and pathways) acted as protective factors by weakening the relations between perceived burdensomeness, thwarted belongingness, and acquired capability for suicide and suicide risk among older adults. METHODS: A community sample of 594 older Australians aged from 60 to 95 years (Mage = 68.72, SDage = 6.67) completed the Suicidal Behaviors Questionnaire-Revised, Interpersonal Needs Questionnaire-Revised, Acquired Capability for Suicide Scale-Fearlessness about Death Scale, Adult Hope Scale, and Geriatric Depression Scale-short form. RESULTS: After controlling for depressive symptoms and sociodemographic variables, hope and agency moderated the thwarted belongingness-suicide risk relation, and hope, agency, and pathways moderated the acquired capability for suicide-risk relation. CONCLUSIONS: Hope may play an important role in reducing suicide risk among older adults experiencing thwarted belongingness and who have acquired the capability for suicide. Research is required to identify ways of reducing suicide risk among older adults who experience perceived burdensomeness. CLINICAL IMPLICATIONS: Increasing hope may reduce suicide risk among older adults experiencing thwarted belongingness and who have acquired the capability for suicide.

A longitudinal study using latent curve models of groups with mild cognitive impairment and Alzheimer's disease.

BACKGROUND: This study explores how mild cognitive impairment (MCI) and Alzheimer's disease (AD) develop over time. NEW METHOD: this study involves a new application of latent curve models (LCM) to examine the development trajectory of a healthy, MCI, and AD groups on a series of clinical and neural measures. Multiple-group latent curve models were used to compare the parameters of the trajectories across groups. RESULTS: LCM results showed that a linear functional form of growth was adequate for all the clinical and neural measures. Positive and significant differences in initial levels were seen across groups on all of the clinical and neural measures. In all groups, the following measures increased slightly, or considerably, over time: Clinical Dementia Rating, Alzheimer's disease Cognitive Assessment, and Montreal Assessment Test for Dementia. In contrast, a slight or a greatly decreasing trajectory was observed on the following measures: Fluorodeoxyglucose, Mini-Mental State Exam, Rey Auditory Verbal Learning Test as well as Hippocampus, Fusiform and Entorhinal Cortex volume measures. However, a constant mean trajectory was seen on Cognition Self Report Memory and languages scores. COMPARISION WITH EXISTING METHODS: there are no prior studies that applied LCM on large AD datasets. CONCLUSIONS: cognitive decline occurs in the cognitively normal (CN), MCI, and AD groups but at different rates. Further, some important cognitive, neural, and clinical variables that (a) best differentiate between CN, MCI, and AD as well as (b) differentially change over time in MCI and AD, which may explain disease progression.

Infertility After Cancer: How the Need to Be a Parent, Fertility-Related Social Concern, and Acceptance of Illness Influence Quality of Life.

BACKGROUND: Adolescents and young adults (AYAs) given a diagnosis of cancer who experience infertility concerns often report having poorer quality of life (QoL). However, the role of infertility-related stressors and illness acceptance on QoL is not clear. OBJECTIVE: The aim of this study was to describe the impact of psychosocial factors surrounding cancer treatment and infertility on QoL. We hypothesized that need for parenthood and infertility-related social concerns would be directly related to QoL and indirectly related to QoL through acceptance of illness. METHODS: Cancer patients/survivors (n = 178; 75.3% female) aged 15 to 29 years completed measures of QoL, acceptance of illness, infertility-related social concerns, and need for parenthood. Path analysis was used to test the hypothesized and subsequent models to determine the best fit for predictors of QoL. RESULTS: The final model explained 28.36% of the variance in QoL. Lower infertility-related social concerns were directly and indirectly related to higher QoL scores. Need for parenthood did not directly relate to QoL, instead relating directly to increased infertility-related social concerns. Higher acceptance of illness (ß = .39) and older age (ß = .19) were directly related to higher QoL scores. Female patients had higher need for parenthood (ß = .17). CONCLUSIONS: These findings suggest that social concerns and expectations surrounding infertility have a negative impact on AYA cancer survivors' and patients' QoL, which increases as AYAs approach socially normative parenting age. IMPLICATIONS FOR PRACTICE: Providing survivors with specialist support to manage their infertility-related social concerns and improve their acceptance of illness has the potential to improve their QoL.

What young people need when a family member dies of cancer.

PURPOSE: This study uses the newly developed Bereaved Cancer Needs Inventory to identify the unmet psychosocial needs of adolescents and young adults who have experienced the death of a parent or sibling to cancer, and to explore the relationship between unmet needs and psychological distress. METHODS: In total, 278 bereaved offspring and 38 bereaved siblings (12-25 years) completed the 58-item Bereaved Cancer Needs Inventory (BCNI) and the Kessler psychological distress scale (K10). RESULTS: Bereaved offspring reported 27 unmet needs on average (SD = 16.87, range: 0-58); 94% indicated at least one unmet need, with 80% indicating 10 or more needs. Bereaved siblings reported 23 unmet needs on average (SD = 17.30, range: 0-57); 97% indicated at least one unmet need, with 68% indicating 10 or more needs. For both bereaved offspring and siblings, the needs for "support from other young people" and "time out and recreation" were most frequently reported as unmet. Approximately half of all participants reported high to very high levels of psychological distress. There was a significant positive relationship between the number of unmet needs and the psychological distress score on the K10 for both groups. CONCLUSIONS: Bereaved offspring and bereaved siblings report unmet psychosocial needs across many domains, which are associated with their levels of psychological distress. Findings suggest the BCNI may be used by healthcare professionals to identify unmet needs and direct clients to the appropriate services, resources, or support; with the intent to reduce their risk of mental illness and psychological distress.

Initial validation of a needs instrument for young people bereaved by familial cancer.

OBJECTIVE: This study aimed to validate the Bereaved Cancer Needs Instrument (BCNI), an instrument designed to assess the unmet psychosocial needs of adolescents and young adults (AYAs, 12-25 years) who have experienced the death of a parent or sibling to cancer. METHODS: In total, 335 participants aged 12 to 25 (M = 15.80, SD = 3.32) who had experienced the death of a parent (N = 297) or sibling (N = 38) from cancer took part in this study. Participants completed the BCNI, the Kessler-10 psychological distress scale (K10), and several items assessing the acceptability of the BCNI. RESULTS: Exploratory factor analysis indicated that a seven-factor structure best fit the BCNI, accounting for 56.65% of the variance in unmet psychosocial needs of cancer-bereaved AYAs. The measure had good psychometric properties, high levels of internal consistency for all domains, and correlated strongly with the K10 (r = .59, p < .001). Item response theory analysis demonstrated that the response scale was appropriate, with strong discrimination indices. Analyses also indicated the potential to reduce the BCNI from 58 items to a 37-item short-form, although this will require further validation. CONCLUSIONS: The BCNI is the first psychometrically validated instrument to identify the unmet psychosocial needs of bereaved AYAs who have experienced the death of a parent or sibling to cancer. The instrument can be used in research and health care settings to identify the unmet needs of young people bereaved by cancer and provide targeted support to reduce psychological distress.

Social decision making in autism: On the impact of mirror neurons, motor control, and imitative behaviors.

The Mirror Neuron System (MNS) plays a crucial role in action perception and imitative behavior, which is suggested to be impaired in Autism Spectrum Disorders (ASDs). In this review, we discuss the plausibility and empirical evidence of a neural interaction between the MNS, action perception, empathy, imitative behavior, and their impact on social decision making in ASDs. To date, there is no consensus regarding a particular theory in ASDs and its underlying mechanisms. Some theories have completely focused on social difficulties, others have emphasized sensory aspects. Based on the current studies, we suggest a multilayer neural network model including the MNS on a first layer and transforming this information to a higher layer network responsible for reasoning. Future studies with ASD participants combining behavioral tasks with neuroimaging methods and transcranial brain stimulation as well as computational modeling can help validate and complement this suggested model. Moreover, we propose applying the behavioral paradigms, and the neurophysiological markers mentioned in this review article for evaluating psychiatric treatment approaches in ASDs. The investigation of modulating effects of different treatment approaches on the neurophysiological markers of the MNS can help find specific subgroups of ASDs patients and support tailored psychiatric interventions.

Interactions between cannabis and schizophrenia in humans and rodents.

In this review, we provide an overview of the relationship between cannabis use and the development of schizophrenia, using both animal and human studies. We further discuss the potential neural mechanism that may mediate the relationship between cannabis use and schizophrenia symptoms. We finally provide clinical implications and future studies that can further elucidate the relationship between cannabis and schizophrenia.

Mathematics, anxiety, and the brain.

Given that achievement in learning mathematics at school correlates with work and social achievements, it is important to understand the cognitive processes underlying abilities to learn mathematics efficiently as well as reasons underlying the occurrence of mathematics anxiety (i.e. feelings of tension and fear upon facing mathematical problems or numbers) among certain individuals. Over the last two decades, many studies have shown that learning mathematical and numerical concepts relies on many cognitive processes, including working memory, spatial skills, and linguistic abilities. In this review, we discuss the relationship between mathematical learning and cognitive processes as well as the neural substrates underlying successful mathematical learning and problem solving. More importantly, we also discuss the relationship between these cognitive processes, mathematics anxiety, and mathematics learning disabilities (dyscalculia). Our review shows that mathematical cognition relies on a complex brain network, and dysfunction to different segments of this network leads to varying manifestations of mathematical learning disabilities.

Impulsivity and its relationship with anxiety, depression and stress.

We aimed to assess the association between depression, anxiety, stress and impulsivity with respect to age. The Depression, Anxiety and Stress Scale (DASS-42) and the Barratt Impulsiveness Scale (BIS-11) were administered to 145 individuals. Due to a negative correlation between age, BIS-11 and DASS-42 subscales, participants were divided into three groups: young-aged (18-30years), middle-aged (31-49years) and old-aged (≥50years). Subjects from old-aged group had significantly lower scores of depression, anxiety, stress and impulsivity compared to those from younger groups. Anxiety, followed by stress and depression, was the strongest predictor of BIS-11 total score in young-aged and middle-aged individuals. There were no significant differences in the correlations between BIS-11 total score, depression, anxiety and stress in old-aged individuals. Our results indicate that the levels of depression, anxiety, stress and impulsivity decrease with age. Additionally, age might moderate the effect of depression, anxiety and stress on impulsivity.

Fine motor movements while drawing during the encoding phase of a serial verbal recall task reduce working memory performance.

The time-based resource-sharing (TBRS) model of working memory indicates that secondary tasks that capture attention for relatively long periods can result in the interference of working memory processing and maintenance. The current study investigates if discrete and continuous movements have differing effects on a concurrent, verbal serial recall task. In the listening condition, participants were asked to recall spoken words presented in lists of six. In the drawing conditions, participants performed the same task while producing discrete (star) or continuous (circle) movements. As hypothesised, participants recalled more words overall in the listening condition compared to the combined drawing conditions. The prediction that the continuous movement condition would reduce recall compared to listening was also supported. Fine-grained analysis at each serial position revealed significantly more words were recalled at mid serial positions in the listening condition, with worst recall for the continuous condition at position 5 compared to the listening and discrete conditions. Kinematic analysis showed that participants increased the size and speed of the continuous movements resulting in a similar duration and number of strokes for each condition. The duration of brief pauses in the discrete condition was associated with the number of words recalled. The results indicate that fine motor movements reduced working memory performance; however, it was not merely performing a movement but the type of the movement that determined how resources were diverted. In the context of the TBRS, continuous movements could be capturing attention for longer periods relative to discrete movements, reducing verbal serial recall.

Writing, Reading, and Listening Differentially Overload Working Memory Performance Across the Serial Position Curve.

Previous research has assumed that writing is a cognitively complex task, but has not determined if writing overloads Working Memory more than reading and listening. To investigate this, participants completed three recall tasks. These were reading lists of words before recalling them, hearing lists of words before recalling them, and hearing lists of words and writing them as they heard them, then recalling them. The experiment involved serial recall of lists of 6 words. The hypothesis that fewer words would be recalled overall when writing was supported. Post-hoc analysis revealed the same pattern of results at individual serial positions (1 to 3). However, there was no difference between the three conditions at serial position 4, or between listening and writing at positions 5 and 6 which were both greater than recall in the reading condition. This suggests writing overloads working memory more than reading and listening, particularly in the early serial positions. The results show that writing interferes with working memory processes and so is not recommended when the goal is to immediately recall information.