The effect of acute swim stress and training in the water maze on hippocampal synaptic activity as well as plasticity in the dentate gyrus of freely moving rats: Revisiting swim‐induced LTP reinforcement

Hippocampal long‐term potentiation (LTP) is a cellular model of learning and memory. An early form of LTP (E‐LTP) can be reinforced into its late form (L‐LTP) by various behavioral interactions within a specific time window (“behavioral LTP‐reinforcement”). Depending on the type and procedure used, various studies have shown that stress differentially affects synaptic plasticity. Under low stress, such as novelty detection or mild foot shocks, E‐LTP can be transformed into L‐LTP in the rat dentate gyrus (DG). A reinforcing effect of a 2‐min swim, however, has only been shown in (Korz and Frey (2003) J Neurosci 23:7281–7287; Korz and Frey (2005) J Neurosci 25:7393–7400; Ahmed et al. (2006) J Neurosci 26:3951–3958; Sajikumar et al., (2007) J Physiol 584.2:389–400) so far. We have reinvestigated these studies using the same as well as an improved recording technique which allowed the recording of field excitatory postsynaptic potentials (fEPSP) and the population spike amplitude (PSA) at their places of generation in freely moving rats. We show that acute swim stress led to a long‐term depression (LTD) in baseline values of PSA and partially fEPSP. In contrast to earlier studies a LTP‐reinforcement by swimming could never be reproduced. Our results indicate that 2‐min swim stress influenced synaptic potentials as well as E‐LTP negatively. © 2013 Wiley Periodicals, Inc.     

Impact of mindfulness training on attentional control and anger regulation processes for psychotherapists in training

Abstract

Objectives: Little empirical literature focuses on psychotherapists' cultivation of internal states of mind necessary for controlling attention and responding empathically to the client. We explore the effects of mindfulness training on emotional and attentional measures in Spanish resident intern psychiatrists and clinical psychologists. Method: One hundred and three residents were assigned to an experimental group (n = 60) that completed an 8-week mindfulness training versus a wait-list control group (n = 43). We evaluated emotional variables (sadness, anxiety, and anger, using standard instruments), state of mindfulness (using the Mindfulness Awareness Attention Scale), and attentional control variables using objective measures such as a continuous performance task and the Stroop task before and after mindfulness training. Results: Our study provides data that suggest that mindfulness training significantly improves measures of trait anger and attentional control. Conclusions: Further research is needed to replicate these findings, explore the effects of mindfulness training on other aspects of emotional regulation and cognition, and evaluate the impact of these effects within clinical situations.     

Interpersonal differentiation within depression diagnosis: Relating interpersonal subgroups to symptom load and the quality of the early therapeutic alliance

Abstract

We examined interpersonal problems in psychotherapy outpatients with a principal diagnosis of a depressive disorder in routine care (n=361). These patients were compared to a normative non-clinical sample and to outpatients with other principal diagnoses (n=959). Furthermore, these patients were statistically assigned to interpersonally defined subgroups that were compared regarding symptoms and the quality of the early alliance. The sample of depressive patients reported higher levels of interpersonal problems than the normative sample and the sample of outpatients without a principal diagnosis of depression. Latent Class Analysis identified eight distinct interpersonal subgroups, which differed regarding self-reported symptom load and the quality of the early alliance. However, therapists' alliance ratings did not differentiate between the groups. This interpersonal differentiation within the group of patients with a principal diagnosis of depression may add to a personalized psychotherapy based on interpersonal profiles.     

The efficacy of long-term psychodynamic psychotherapy,fluoxetine and their combination in the outpatient treatment of depression

Abstract

Objective: There are few randomized controlled trials examining the efficacy of long-term psychodynamic psychotherapy (LTPP) in depression treatment. LTPP was compared with fluoxetine treatment and their combination; Methods: 272 depressed patients (aged 26–34, 72% with a first episode of depression) were randomized to receive LTPP (one session/week), fluoxetine treatment (20–60 mg/day) or their combination for 24 months. Beck Depression Inventory (BDI) was the outcome measure. The psychotherapy was not manualized and the treatment took place under real-life conditions in an outpatient psychiatric clinic. Results: Intention-to-treat analyses indicated that all the treatments were associated with significant reductions in the BDI scores (mean reduction of 18.88 BDI points). Furthermore, LTPP and combination therapy were more effective in reducing BDI scores than fluoxetine alone (22.08 and 22.04 vs. 12.53 BDI points). Conclusions: LTPP, pharmacological treatment with fluoxetine and their combination are effective in reducing symptoms of patients with moderate depression. LTPP and combined treatment were more effective compared to fluoxetine alone. These findings have implications for patients with depression who may benefit from long-term psychotherapy or combined treatment, or for depressed patients who do not wish to take medications such as fluoxetine.     

Fathers' and mothers' perceptions of their child and maternal depressive symptoms

Fathers' reports concerning their children have seldom been considered in the previous studies on maternal depression and child development. The literature on parental reports in general suggests that discrepancies in mothers' and fathers' perceptions are associated with the psychological state of the parent and the gender of the child. As part of a prospective follow-up study, fathers' and mothers' perceptions of children's social competence and behavioural/ emotional problems were assessed by the Child Behavior Checklists (CBCLs) when the firstborn children were 8–9 years old. The depressive symptoms of the mothers were screened by the Edinburgh Postnatal Depression Scale (EPDS) at the same time point. The level of children's social competence and behavioural/emotional problems reported by the fathers were analysed by background factors. The reports of both parents were explored by the gender of the child and by the presence of maternal depressive symptoms. The concordance of parental reports concerning child's social competence was high, but fathers usually reported lower problem levels than mothers, particularly for boys' problems. The presence of maternal depressive symptoms was associated with child's high problem levels from both fathers' and mothers' perspective. Parental ratings of children's externalizing problems in particular were associated with high maternal depressive symptom level.