"The insula is critical to the integration of emotional and homeostatic information , and may be involved in translating interoceptive signals into conscious feelings ( Critchley et al . , 2005 ; Critchley et al . , 2004 ; Naqvi and Bechara , 2009 ; Terasawa et al . , 2013a ) . For example , the magnitude of insula activation while participants evaluated their own emotional and bodily states was found to be associated with social anxiety and neuroticism ( Terasawa et al . , 2013b ) . Insula activation has also been associated with self - report measures of anxiety ( Stein et al . , 2007 ) and anticipation "
[Show abstract][Hide abstract] ABSTRACT: This work investigated the impact of heavy marijuana use during adolescence on emotional functioning, as well as the brain functional mediators of this effect. Participants (n = 40) were recruited from the Michigan Longitudinal Study (MLS). Data on marijuana use were collected prospectively beginning in childhood as part of the MLS. Participants were classified as heavy marijuana users (n = 20) or controls with minimal marijuana use. Two facets of emotional functioning—negative emotionality and resiliency (a self-regulatory mechanism)—were assessed as part of the MLS at three time points: mean age 13.4; mean age 19.6; and mean age 23.1. Functional neuroimaging data during an emotion-arousal word task were collected at mean age 20.2. Negative emotionality decreased and resiliency increased across the three time points in controls but not heavy marijuana users. Compared with controls, heavy marijuana users had less activation to negative words in temporal, prefrontal, and occipital cortices, insula, and amygdala. Activation of dorsolateral prefrontal cortex to negative words mediated an association between marijuana group and later negative emotionality. Activation of the cuneus/lingual gyrus mediated an association between marijuana group and later resiliency. Results support growing evidence that heavy marijuana use during adolescence affects later emotional outcomes.
"Several studies suggest that we refer to our own bodily state when evaluating our emotional state and that the areas mentioned above serve as common ground (Dunn et al., 2010; Gu et al., 2013b; Pollatos et al., 2005a). Different models propose that the subjective experience of emotion arises from the integration of interoceptive stimuli and external environmental stimuli in the aIC (Craig, 2009; Critchley, 2009; Gu et al., 2013a; Kurth et al., 2010; Terasawa et al., 2013a). Present results support the blending of interoception and emotion and highlight the role of internal cardiac triggers in the rapid encoding of emotional salience. "
"ich perhaps hints at altered awareness or calibra - tion of internal states ; they seem to require greater levels of arousal than the healthy participants to reach the same conscious decision . Emotional awareness may depend on integrating sensorimo - tor and interoceptive information with an interpretation of the external situation in real time ( Terasawa et al . , 2013 ) . The role of bodily sensations and interoceptive awareness in emotion experi - ence is unclear but interoception and somatosensory processing are compromised in the SZ - spectrum ( Peled et al . , 2003 ; Chang and Lenzenweger , 2005 ; Linnman et al . , 2013 ) and may con - tribute to alexithymia ( Van ' t Wout et al . , 2007 ; Aaron "
[Show abstract][Hide abstract] ABSTRACT: Adaptive emotional responses are important in interpersonal relationships. We investigated self-reported emotional experience, physiological reactivity, and micro-facial expressivity in relation to the social nature of stimuli in individuals with schizophrenia (SZ).
Galvanic skin response (GSR) and facial electromyography (fEMG) were recorded in medicated outpatients with SZ and demographically matched healthy controls (CO) while they viewed social and non-social images from the International Affective Pictures System. Participants rated the valence and arousal, and selected a label for experienced emotions. Symptom severity in the SZ and psychometric schizotypy in CO were assessed.
The two groups did not differ in their labeling of the emotions evoked by the stimuli, but individuals with SZ were more positive in their valence ratings. Although self-reported arousal was similar in both groups, mean GSR was greater in SZ, suggesting differential awareness, or calibration of internal states. Both groups reported social images to be more arousing than non-social images but their physiological responses to non-social vs. social images were different. Self-reported arousal to neutral social images was correlated with positive symptoms in SZ. Negative symptoms in SZ and disorganized schizotypy in CO were associated with reduced mean fEMG. Greater corrugator mean fEMG activity for positive images in SZ indicates valence-incongruent facial expressions.
The patterns of emotional responses differed between the two groups. While both groups were in broad agreement in self-reported arousal and emotion labels, their mean GSR, and fEMG correlates of emotion diverged in relation to the social nature of the stimuli and clinical measures. Importantly, these results suggest disrupted self awareness of internal states in SZ and underscore the complexities of emotion processing in health and disease.
Frontiers in Psychology 04/2015; 6. DOI:10.3389/fpsyg.2015.00320 · 2.80 Impact Factor
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