Interoception in anxiety and depression

We review the literature on interoception as it relates to depression and anxiety, with a focus on belief, and alliesthesia. The connection between increased but noisy afferent interoceptive input, self-referential and belief-based states, and top-down modulation of poorly predictive signals is integrated into a neuroanatomical and processing model for depression and anxiety. The advantage of this conceptualization is the ability to specifically examine the interface between basic interoception, self-referential belief-based states, and enhanced top-down modulation to attenuate poor predictability. We conclude that depression and anxiety are not simply interoceptive disorders but are altered interoceptive states as a consequence of noisily amplified self-referential interoceptive predictive belief states

Mood Regulation and Cognitive Reactivity in Depression Vulnerability

There is substantial evidence supporting the hypothesis that cognitive reactivity is an important variable in the etiology of depression. However, there is a lack of studies examining possible mechanisms that underlie cognitive reactivity. The present study tested whether two specific mood regulation processes differentially appear in vulnerable and non-vulnerable individuals, and whether they can account for differences in cognitive reactivity. In a cross-sectional experimental design, 20 formerly-depressed individuals (FD) were compared with 20 never-depressed individuals (ND). In an autobiographical memory task both groups differed concerning the use of positively and negatively toned emotion words: FD retrieved fewer positive emotion words than ND in the second phase of this task. Furthermore, FD with a high cognitive reactivity retrieved more negatively toned emotion words. In the ND group there was a different pattern: Subjects with a high cognitive reactivity retrieved less positively toned emotion words. Two different cognitive processes seem to account for cognitive reactivity in individuals who are at high versus low risk for depression

Negative Automatic Evaluation and Better Recognition of Bodily Symptom Words in College Students with Elevated Health Anxiety

Schmidt E, Witthöft M, Kornadt A, Rist F, Bailer J. Negative Automatic Evaluation and Better Recognition of Bodily Symptom Words in College Students with Elevated Health Anxiety. Cognitive Therapy and Research. 2013;37(5):1027-1040

Tracking the implicit self using event-related potentials

Negative biases in implicit self-evaluation are thought to be detrimental to subjective well-being and have been linked to various psychological disorders, including depression. An understanding of the neural processes underlying implicit self-evaluation in healthy subjects could provide a basis for the investigation of negative biases in depressed patients, the development of differential psychotherapeutic interventions, and the estimation of relapse risk in remitted patients. We thus studied the brain processes linked to implicit self-evaluation in 25 healthy subjects using event-related potential (ERP) recording during a self-relevant Implicit Association Test (sIAT). Consistent with a positive implicit self-evaluation in healthy subjects, they responded significantly faster to the congruent (self-positive mapping) than to the incongruent sIAT condition (self-negative mapping). Our main finding was a topographical ERP difference in a time window between 600 and 700 ms, whereas no significant differences between congruent and incongruent conditions were observed in earlier time windows. This suggests that biases in implicit self-evaluation are reflected only indirectly, in the additional recruitment of control processes needed to override the positive implicit self-evaluation of healthy subjects in the incongruent sIAT condition. Brain activations linked to these control processes can thus serve as an indirect measure for estimating biases in implicit self-evaluation. The sIAT paradigm, combined with ERP, could therefore permit the tracking of the neural processes underlying implicit self-evaluation in depressed patients during psychotherapy