Explicit and Implicit Emotion Processing in the Cerebellum: A Meta-analysis and Systematic Review.

The cerebellum's role in affective processing is increasingly recognized in the literature, but remains poorly understood, despite abundant clinical evidence for affective disruptions following cerebellar damage. To improve the characterization of emotion processing and investigate how attention allocation impacts this processing, we conducted a meta-analysis on task activation foci using GingerALE software. Eighty human neuroimaging studies of emotion including 2761 participants identified through Web of Science and ProQuest databases were analyzed collectively and then divided into two categories based on the focus of attention during the task: explicit or implicit emotion processing. The results examining the explicit emotion tasks identified clusters within the posterior cerebellar hemispheres (bilateral lobule VI/Crus I/II), the vermis, and left lobule V/VI that were likely to be activated across studies, while implicit tasks activated clusters including bilateral lobules VI/Crus I/II, right Crus II/lobule VIII, anterior lobule VI, and lobules I-IV/V. A direct comparison between these categories revealed five overlapping clusters in right lobules VI/Crus I/Crus II and left lobules V/VI/Crus I of the cerebellum common to both the explicit and implicit task contrasts. There were also three clusters activated significantly more for explicit emotion tasks compared to implicit tasks (right lobule VI, left lobule VI/vermis), and one cluster activated more for implicit than explicit tasks (left lobule VI). These findings support previous studies indicating affective processing activates both the lateral hemispheric lobules and the vermis of the cerebellum. The common and distinct activation of posterior cerebellar regions by tasks with explicit and implicit attention demonstrates the supportive role of this structure in recognizing, appraising, and reacting to emotional stimuli.

Influence of bodily resonances on emotional prosody perception.

Introduction: Emotional prosody is defined as suprasegmental and segmental changes in the human voice and related acoustic parameters that can inform the listener about the emotional state of the speaker. While the processing of emotional prosody is well represented in the literature, the mechanism of embodied cognition in emotional voice perception is very little studied. This study aimed to investigate the influence of induced bodily vibrations-through a vibrator placed close to the vocal cords-in the perception of emotional vocalizations. The main hypothesis was that induced body vibrations would constitute a potential interoceptive feedback that can influence the auditory perception of emotions. It was also expected that these effects would be greater for stimuli that are more ambiguous. Methods: Participants were presented with emotional vocalizations expressing joy or anger which varied from low-intensity vocalizations, considered as ambiguous, to high-intensity ones, considered as non-ambiguous. Vibrations were induced simultaneously in half of the trials and expressed joy or anger congruently with the voice stimuli. Participants had to evaluate each voice stimulus using four visual analog scales (joy, anger, and surprise, sadness as control scales). Results: A significant effect of the vibrations was observed on the three behavioral indexes-discrimination, confusion and accuracy-with vibrations confusing rather than facilitating vocal emotion processing. Conclusion: Over all, this study brings new light on a poorly documented topic, namely the potential use of vocal cords vibrations as an interoceptive feedback allowing humans to modulate voice production and perception during social interactions.

Posttraumatic anger: a confirmatory factor analysis of the Dimensions of Anger Reactions Scale-5 (DAR-5) - French adaptation.

Background: Research has shown that posttraumatic anger is common after a traumatic experience, represents a risk factor for post-trauma psychopathology, and can be screened for using the Dimensions of Anger Reactions Scale-5 (DAR-5), a concise five-item measure. However, a French version of the DAR-5 is not yet available. Objective: We aimed to provide a French adaptation (DAR-5-F) and to replicate, in a French community sample, the psychometric properties of the original DAR-5. Method: After translation using transcultural psychometric principles, the DAR-5-F was presented to 822 fluent French speakers alongside validated scales of anger (State-Trait Anger Expression Inventory-2), anxiety and depression (Hospital Anxiety and Depression Scale), alcohol misuse (Alcohol Use Disorders Identification Test-Consumption), and trauma exposure (Life Events Checklist-5). Results: Confirmatory factor analyses confirmed that DAR-5-F scores fit a single-factor model as described with the English version of the scale. The scale showed noteworthy internal consistency and robust convergent validity with trait anger. The screening DAR-5-F cut-off of ≥12 successfully differentiated high from low scores of STAXI-2, anxiety, depression, and traumatic exposure. Conclusions: The DAR-5 is a robust, psychometrically strong brief scale of anger useful for post-trauma screening, with the DAR-5-F now available for use in French-speaking populations. Future research that examines relationships between the DAR-5-F and variables such as trauma severity and posttraumatic stress symptoms will further improve our understanding of these phenomena.

Antecedentes: La investigación ha demostrado que la ira postraumática es común después de una experiencia traumática, representa un factor de riesgo para psicopatología post trauma, y puede ser tamizada usando las dimensiones de la Escala de Reacciones de Ira-5 (DAR-5 por sus siglas en inglés), una medida concisa de 5 items. Sin embargo, una versión francesa del DAR-5 no está aún disponible.Objetivo: Nuestro objetivo fue proveer una adaptación francesa (DAR-5-F) y replicar, en una muestra de la comunidad francesa, las propiedades psicométricas de la DAR-5 original.Método: Después de una traducción usando principios psicométricos transculturales, la DAR-5-F se presentó a 822 francoparlantes fluidos junto a escalas validadas de ira (Inventario de Expresión de Ira estado-rasgo, STAXI-2), ansiedad y depresión (Escala de Ansiedad y Depresión Hospitalaria, HAD), abuso de alcohol (Test de Identificación de Trastornos por consumo de alcohol, AUDIT- Consumo), y exposición a trauma (Lista de Chequeo de Eventos Vitales, LEC-5).Resultados: El análisis factorial confirmatorio confirmó que el puntaje de DAR-5 F calza con un modelo de factor único como se describió en la versión inglesa de la escala. La escala mostró una consistencia interna notable y una validez convergente robusta con la ira-rasgo. El punto de corte del tamizaje de DAR-5 F igual o mayor a 12 diferenció exitosamente los puntajes altos de los bajos de STAXI-2, ansiedad, depresión, y exposición traumática.Conclusiones: La DAR-5 es una escala de ira breve robusta, psicométricamente fuerte útil para el tamizaje post trauma, con la DAR-5 F ahora disponible para su uso en población francoparlante. Investigaciones futuras que examinen la relación entre la DAR-5 F y variables tales como severidad del trauma y síntomas de estrés postraumático mejorarán aún más nuestra comprensión de este fenómeno.