Working memory dysfunction in schizophrenia compared to healthy controls and patients with depression: evidence from event-related fMRI

Studies on working memory (WM) dysfunction in schizophrenia have reported several functionally aberrant brain areas including the lateral prefrontal cortex, superior temporal areas and the striatum. However, less is known about the relationship of WM-dysfunction, cerebral activation, task-accuracy and diagnostic specificity. Using a novel WM-task and event-related functional magnetic resonance imaging (fMRI), we studied healthy control subjects (n=17) and partially remitted, medicated inpatients meeting DSM-IV criteria for schizophrenia (n=19) and major depressive disorder (n=12). Due to the event-related technique, we excluded incorrectly performed trials, thus controlling for accuracy-related activation confounds. Compared with controls, patients with schizophrenia showed less activation in frontoparietal and subcortical regions at high cognitive load levels. Compared with patients with depression, schizophrenic patients showed less prefrontal activation in left inferior frontal cortex and right cerebellum. In patients with schizophrenia, a lack of deactivation of the superior temporal cortex was found compared to both healthy controls and patients with depression. Thus, we could not confirm previous findings of impaired lateral prefrontal activation during WM performance in schizophrenic patients after the exclusion of incorrectly performed or omitted trials in our functional analysis. However, superior temporal cortex dysfunction in patients with schizophrenia may be regarded as schizophrenia-specific finding in terms of psychiatric diagnosis specificity.     

Increased frontocerebellar activation in alcoholics during verbal working memory: an fMRI study

Although there is clear evidence of alcoholism-related damage to the frontal lobes and cerebellum from neuroimaging, neuropathological, and neuropsychological studies, the functional role of the cerebellum and cerebrocerebellar circuits related to verbal working memory deficits of alcoholics have not been well studied. Alcoholic and nonalcoholic subjects performed a Sternberg verbal working memory task while receiving an fMRI scan in a 3T magnet. This task has been found in previous studies to reliably activate the articulatory control and phonological storage components of the phonological loop (left frontal, left temporal/parietal structures, right superior cerebellar regions) in young healthy controls. We hypothesized that the alcoholics would show a different pattern of activation from the controls, based on the regions of interest (ROIs) identified from a previous study of healthy subjects. Behavioral results showed the alcoholics to be performing at a comparable level to the matched controls in terms of accuracy and median reaction time, with no statistically significant differences. However, analysis of the functional data revealed that the alcoholics exhibited greater activation in the left frontal (BA44/45) and right superior cerebellum (HVI) regions relative to the matched controls. These findings suggest that brain activation in left frontal and right cerebellar regions that support the articulatory control system of verbal working memory may require a compensatory increase in alcoholics in order to maintain the same level of performance as controls.     

Metacognitive Therapy in Recurrent and Persistent Depression: A Multiple-Baseline Study of a New Treatment

Metacognitive Therapy (MCT) for depression is a formulation-driven treatment grounded in the Wells and Matthews (Attention and emotion: A clinical perspective, 1994) self-regulatory model. Unlike traditional CBT it does not focus on challenging the content of depressive thoughts or on increasing mastery and pleasure. Instead it focuses on reducing unhelpful cognitive processes and facilitates metacognitive modes of processing. MCT enables patients to interrupt rumination, reduce unhelpful self-monitoring tendencies, and establish more adaptive styles of responding to thoughts and feelings. An important component of treatment is modification of positive and negative metacognitive beliefs about rumination. MCT was evaluated in 6–8 sessions of up to 1 h each across 4 patients with recurrent and/or chronic major depressive disorder. A non-concurrent multiple-baseline with follow-up at 3 and 6 months was used. Patients were randomly allocated to different length baselines and outcomes were assessed via self-report and assessor ratings. Treatment was associated with large and clinically significant improvements in depressive symptoms, rumination and metacognitive beliefs and gains were maintained over follow-up. The small number of cases limits generalisability but continued evaluation of this new brief treatment is clearly indicated. This study was supported by Grant No. G0300938 from the UK Medical Research Council.     

The Relationship of Maternal-Fetal Attachment and Postpartum Depression: A Longitudinal Study

Aim

To determine the relationship between maternal-fetal attachment and postpartum depression.

Hemispheric Activation of Anterior and Inferior Prefrontal Cortex during Verbal Encoding and Recognition: A PET Study of Healthy Volunteers

Evidence of bilateral prefrontal activation during memory encoding and retrieval has increased attention given to anatomical subdivisions within the prefrontal cortex. The current study examined anterior and inferior aspects of the prefrontal cortex to determine their degree of functional and hemispheric overlap during encoding and recognition. Cerebral blood flow of 25 healthy volunteers was measured using PET ¹⁵O-water methods during four conditions: resting baseline, sequential finger movement, word encoding, and word recognition. Resting and motor images were averaged to provide a single reference that was subtracted from encoding and recognition using statistical parametric mapping (SPM96). Memory conditions were also subtracted from each other to identify differences in regional activity. Subjects performed well (86% correct) and had a slightly conservative response bias. Baseline subtraction from encoding revealed focal activation of left inferior prefrontal cortex (area 45) without significant contralateral activation. Recognition minus baseline subtraction produced a focal right anterior prefrontal activation (areas 9 and 10) that was not present in the left hemisphere. Bilateral effects were seen in area 45 during recognition. Subtraction of memory tasks from each other did not reveal any areas of greater activity during encoding. However, the recognition task produced greater activation in right area 9 extending into the anterior cingulate. Greater activity during recognition was also observed in left insula and bilateral visual integration areas. These results are discussed in relation to the prevailing model of prefrontal hemispheric asymmetry during episodic memory.     

认知行为疗法和帕罗西汀治疗对轻型抑郁障碍的临床对照研究

目的比较认知行为疗法和帕罗西汀对轻型抑郁障碍患者的临床疗效及预后差异。方法制定一套适用于轻型抑郁障碍的认知行为治疗操作手册。将64例符合DSM-Ⅳ诊断标准的轻型抑郁障碍患者分为认知行为治疗组和帕罗汀治疗组各32例,治疗6周,用汉密顿抑郁量表评定两组治疗前和治疗后第2、4、6周末的减分值、6周后疗效及6个月随访时的复发/再燃率及其副作用。结果①治疗有第6周末两组减分值差异有统计学意义(F=8.3,P=0);②帕罗汀治疗组和认知行为治疗组在第6周末两组疗效差异无统计学意义(u=316.5,P=0.06),其中帕罗汀治疗组痊愈率为20.7%,显效率为48.3%,认知行为治疗组痊愈率为10.0%,显效率为36.7%。③随访时6个月时,帕罗汀组复发(包括再燃率)高于认知行为治疗组(u=106.5,P=0.04)。结论单纯认知行为治疗与帕罗汀治疗在一定程度上疗效相当,所制定的手册针对轻型抑郁障碍患者的特点,对于轻型抑郁障碍有一定的治疗效果,可在临床推广试用。     

Mental well-being of intensive care unit nurses after the second surge of the COVID-19 pandemic: A cross-sectional and longitudinal study

ObjectivesTo determine the impact of the second surge of the COVID-19 pandemic (October 2020 to June 2021) on mental well-being of intensive care unit nurses and factors associated with mental health outcomes.MethodsAn online survey was available for Dutch intensive care unit nurses in October 2021, measuring mental health symptoms; anxiety, depression (Hospital Anxiety and Depression Scale), and post-traumatic stress disorder (Impact of Event Scale-6). Additionally, work-related fatigue was measured using the Need For Recovery-11 questionnaire. Previous data from the first surge (March until June 2020) were used to study mental well-being longitudinally in a subgroup of intensive care unit nurses. Logistic regression analyses were performed to determine factors associated with mental health symptoms.ResultsIn total, 589 nurses (mean age 44.8 [SD, 11.9], 430 [73.8 %] females) participated, of whom 164 also completed the questionnaire in 2020. After the second surge, 225/589 (38.2 %) nurses experienced one or more mental health symptoms and 294/589 (49.9 %) experienced work-related fatigue. Compared to the first measurement, the occurrence of mental health symptoms remained high (55/164 [33.5 %] vs 63/164 [38.4 %], p = 0.36) and work-related fatigue was significantly higher (66/164 [40.2 %] vs 83/164 [50.6 %], p = 0.02). Granted holidays as requested (aOR, 0.54; 95 % CI, 0.37–0.79), being more confident about the future (aOR, 0.59; 95 % CI, 0.37–0.93) and a better perceived work-life balance (aOR, 0.42; 95 % CI, 0.27–0.65) were significantly associated with less symptoms.ConclusionThe second surge of the COVID-19 pandemic further drained the mental reserves of intensive care unit nurses, resulting in more work-related fatigue.     

Association between Type-D Personality and Affective (Anxiety,Depression, Post-traumatic Stress) Symptoms and Maladaptive Coping in Breast Cancer Patients: A Longitudinal Study

Background:Type-D (distressed) personality has not been prospectively explored for its association with psychosocial distress symptoms in breast cancer patients.Objective:The objective of the study was to test the hypothesis that Type-D personality can be associated with psychosocial distress variables in cancer over a 2-point period (6 month-follow-up).Aims:The aim of the study was to analyze the role of Type-D personality in relation to anxiety, depression, post-traumatic stress symptoms, general distress, and maladaptive coping among cancer patients.Methods:145 breast cancer patients were assessed within 6 months from diagnosis (T0) and again 6 months later (T1). The Type-D personality Scale, the Hospital Anxiety and Depression Scale, Depression subscale (HAD-D), the Brief Symptom Inventory (BSI-18) Anxiety subscale, the Distress Thermometer (DT), the Post-traumatic Symptoms (PTS) Impact of Event Scale (IES), and the Mini Mental Adjustment to Cancer (Mini-MAC) Anxious Preoccupation and Hopelessness scales were individually administered at T0 and T1.Results:One-quarter of cancer patients met the criteria for Type-D personality, which was stable over the follow-up time. The two main constructs of Type-D personality, namely social inhibition (SI) and negative affectivity (NA), were related to anxiety, depression, PTS, BSI-general distress and maladaptive coping (Mini-MAC anxious preoccupation and hopelessness). In regression analysis, Type-D SI was the most significant factor associated with the above-mentioned psychosocial variables, both at T0 and T1.Conclusion:Likewise other medical disorders (especially cardiology), Type-D personality has been confirmed to be a construct significantly related to psychosocial distress conditions and maladaptive coping that are usually part of assessment and intervention in cancer care. More attention to personality issues is important in oncology.     

脑卒中后吞咽障碍患者下丘脑功能连接和全脑各向异性的磁共振成像研究

目的 观察脑卒中后吞咽障碍患者下丘脑功能连接和脑白质结构的影像学改变.方法 2018年12月至2019年12月,选择卒中后吞咽障碍患者14例(患者组)和年龄、性别、优势半球相匹配的健康志愿者15例(对照组),以下丘脑为种子点,静息态功能磁共振成像观察与全脑功能连接变化,提取组间存在显著性差异脑区与进食评估工具(EAT-...     

Efficacy of Videoconference Group Acceptance and Commitment Therapy (ACT) and Behavioral Activation Therapy for Depression (BATD) for Chronic Low Back Pain (CLBP) Plus Comorbid Depressive Symptoms: A Randomized Controlled Trial (IMPACT Study)

This study examined the efficacy of adding a remote, synchronous, group, videoconference-based form of acceptance and commitment therapy (ACT) or behavioral activation therapy for depression (BATD) to treatment-as-usual (TAU) in 234 patients with chronic low back pain (CLBP) plus comorbid depressive symptoms. Participants were randomly assigned to ACT, BATD, or TAU. Compared to TAU, ACT produced a significant reduction in pain interference at posttreatment (d = .64) and at follow-up (d = .73). BATD was only superior to TAU at follow-up (d = .66). A significant reduction in pain catastrophizing was reported by patients assigned to ACT and BATD at posttreatment (d = .45 and d = .59, respectively) and at follow-up (d = .59, in both) compared to TAU. Stress was significantly reduced at posttreatment by ACT in comparison to TAU (d = .69). No significant between-group differences were found in depressive or anxiety symptoms. Clinically relevant number needed to treat (NNT) values for reduction in pain interference were obtained at posttreatment (ACT vs TAU = 4) and at follow-up (ACT vs TAU = 3; BATD vs TAU = 5). In both active therapies, improvements in pain interference at follow-up were significantly related to improvements at posttreatment in psychological flexibility. These findings suggest that new forms of cognitive-behavioral therapy are clinically useful in improving pain interference and pain catastrophizing. Further research on evidence-based change processes is required to understand the therapeutic needs of patients with chronic pain and comorbid conditions.Trial numberNCT04140838.PerspectiveGroup videoconference-based ACT and BATD showed greater efficacy than TAU for reducing pain interference and pain catastrophizing in patients with CLBP plus clinically relevant depression. Psychological flexibility appeared to be the main contributor to treatment effects for both ACT and BATD.