Social cognition and suicide-related behaviors in depression: a cross-sectional, exploratory study

Objective: To explore the association between social cognition and previous suicide attempts and non-suicidal self-injurious behavior in adults with unipolar depressive disorders. Methods: Seventy-two patients undergoing outpatient treatment for unipolar depression were enrolled in this cross-sectional study. Theory of mind was assessed using the Hinting Task and the Revised Reading the Mind in the Eyes Test. Empathy was evaluated using the Interpersonal Reactivity Index. Lifetime suicide attempts and non-suicidal self-injurious behavior were assessed using the Columbia Suicide Risk Rating Scale. Participants with and without these suicide-related outcomes were compared in terms of social cognition. Results: Patients with previous suicide attempts performed worse on the Reading the Mind in the Eyes Test (p = 0.017). Patients with a history of non-suicidal self-injurious behavior were younger (p = 0.005), had a younger age at first depressive episode (p = 0.017), and scored higher on personal distress in the Interpersonal Reactivity Index (p = 0.027). Only personal distress remained independently associated with non-suicidal self-injurious behavior in multivariable analysis (p = 0.038). Conclusion: Among patients with depression, those with previous suicide attempts or non-suicidal self-injurious behavior showed worse social cognition. These results encourage future research on social cognition deficits as clinical markers of suicide-related behaviors and as targets for interventions.

Social cognition and suicide-related behaviors in depression: a cross-sectional, exploratory study.

OBJECTIVE: To explore the association between social cognition and previous suicide attempts and non-suicidal self-injurious behavior in adults with unipolar depressive disorders. METHODS: Seventy-two patients undergoing outpatient treatment for unipolar depression were enrolled in this cross-sectional study. Theory of mind was assessed using the Hinting Task and the Revised Reading the Mind in the Eyes Test. Empathy was evaluated using the Interpersonal Reactivity Index. Lifetime suicide attempts and non-suicidal self-injurious behavior were assessed using the Columbia Suicide Risk Rating Scale. Participants with and without these suicide-related outcomes were compared in terms of social cognition. RESULTS: Patients with previous suicide attempts performed worse on the Reading the Mind in the Eyes Test (p = 0.017). Patients with a history of non-suicidal self-injurious behavior were younger (p = 0.005), had a younger age at first depressive episode (p = 0.017), and scored higher on personal distress in the Interpersonal Reactivity Index (p = 0.027). Only personal distress remained independently associated with non-suicidal self-injurious behavior in multivariable analysis (p = 0.038). CONCLUSION: Among patients with depression, those with previous suicide attempts or non-suicidal self-injurious behavior showed worse social cognition. These results encourage future research on social cognition deficits as clinical markers of suicide-related behaviors and as targets for interventions.

Deep Brain Stimulation for Obesity: A Review and Future Directions.

The global prevalence of obesity has been steadily increasing. Although pharmacotherapy and bariatric surgeries can be useful adjuvants in the treatment of morbid obesity, they may lose long-term effectiveness. Obesity result largely from unbalanced energy homeostasis. Palatable and densely caloric foods may affect the brain overlapped circuits involved with homeostatic hypothalamus and hedonic feeding. Deep brain stimulation (DBS) consists of delivering electrical impulses to specific brain targets to modulate a disturbed neuronal network. In selected patients, DBS has been shown to be safe and effective for movement disorders. We review all the cases reports and series of patients treated with DBS for obesity using a PubMed search and will address the following obesity-related issues: (i) the hypothalamic regulation of homeostatic feeding; (ii) the reward mesolimbic circuit and hedonic feeding; (iii) basic concepts of DBS as well as the rationale for obesity treatment; (iv) perspectives and challenges in obesity DBS. The small number of cases provides preliminary evidence for the safety and the tolerability of a potential DBS approach. The ventromedial (n = 2) and lateral (n = 8) hypothalamic nuclei targets have shown mixed and disappointing outcomes. Although nucleus accumbens (n = 7) targets were more encouraging for the outcomes of body weight reduction and behavioral control for eating, there was one suicide reported after 27 months of follow-up. The authors did not attribute the suicide to DBS therapy. The identification of optimal brain targets, appropriate programming strategies and the development of novel technologies will be important as next steps to move DBS closer to a clinical application. The identification of electrical control signals may provide an opportunity for closed-loop adaptive DBS systems to address obesity. Metabolic and hormonal sensors such as glycemic levels, leptin, and ghrelin levels are candidate control signals for DBS. Focused excitation or alternatively inhibition of regions of the hypothalamus may provide better outcomes compared to non-selective DBS. Utilization of the NA delta oscillation or other physiological markers from one or multiple regions in obesity-related brain network is a promising approach. Experienced multidisciplinary team will be critical to improve the risk-benefit ratio for this approach.

Ultra-short heart rate variability recording reliability: The effect of controlled paced breathing.

BACKGROUND: Recent studies have reported that Heart Rate Variability (HRV) indices remain reliable even during recordings shorter than 5 min, suggesting the ultra-short recording method as a valuable tool for autonomic assessment. However, the minimum time-epoch to obtain a reliable record for all HRV domains (time, frequency, and Poincare geometric measures), as well as the effect of respiratory rate on the reliability of these indices remains unknown. METHODS: Twenty volunteers had their HRV recorded in a seated position during spontaneous and controlled respiratory rhythms. HRV intervals with 1, 2, and 3 min were correlated with the gold standard period (6-min duration) and the mean values of all indices were compared in the two respiratory rhythm conditions. RESULTS: rMSSD and SD1 were more reliable for recordings with ultra-short duration at all time intervals (r values from 0.764 to 0.950, p < 0.05) for spontaneous breathing condition, whereas the other indices require longer recording time to obtain reliable values. The controlled breathing rhythm evokes stronger r values for time domain indices (r values from 0.83 to 0.99, p < 0.05 for rMSSD), but impairs the mean values replicability of domains across most time intervals. Although the use of standardized breathing increases the correlations coefficients, all HRV indices showed an increase in mean values (t values from 3.79 to 14.94, p < 0.001) except the RR and HF that presented a decrease (t = 4.14 and 5.96, p < 0.0001). CONCLUSION: Our results indicate that proper ultra-short-term recording method can provide a quick and reliable source of cardiac autonomic nervous system assessment.