As predicted, divergent connections between insula subdivisions and anticorrelated resting brain networks were observed during abstinence. These changes reflect an attentional bias toward aversive affective processing and not directly away from exogenous cognitive processing, suggesting a coordinated modulation of circuits associated with interoceptive and affective processing that instantiates an aversive state during nicotine abstinence.

Deficits in cognitive control processes are a primary characteristic of nicotine addiction. However, while network-based connectivity measures of dysfunction have frequently been observed, empirical evidence of task-based dysfunction in these processes has been inconsistent. Here, in a sample of smokers (n = 35) and non-smokers (n = 21), a previously validated parametric flanker task is employed to characterize addiction-related alterations in responses to varying (ie, high, intermediate, and low) demands for cognitive control. This approach yields a demand-response curve that aims to characterize potential non-linear responses to increased demand for control, including insensitivities or lags in fully activating the cognitive control network. We further used task-based differences in activation between groups as seeds for resting-state analysis of network dysfunction in an effort to more closely link prior inconsistencies in task-related activation with evidence of impaired network connectivity in smokers. For both smokers and non-smokers, neuroimaging results showed similar increases in activation in brain areas associated with cognitive control. However, reduced activation in right insula was seen only in smokers and only when processing intermediate demand for cognitive control. Further, in smokers, this task-modulated right insula showed weaker functional connectivity with the superior frontal gyrus, a component of the task-positive executive control network. These results demonstrate that the neural instantiation of salience attribution in smokers is both more effortful to fully activate and has more difficulty communicating with the exogenous, task-positive, executive control network. Together, these findings further articulate the cognitive control dysfunction associated with smoking and illustrate a specific brain circuit potentially responsible.

Introduction: Self-care has not been traditionally taught in medical education, but the epidemic of burnout among health professionals necessitates a change in culture, and consequently a change in curriculum. Burnout begins early in training and negatively impacts health professionals, patients, and institutions. Interventions that prevent and avert burnout are necessary at all stages of a doctor’s career to assure well-being over a lifetime. Evidence-based strategies supporting both personal and system wellness have begun to emerge, but more research is needed. Methods: We present a collaborative and comprehensive wellness program: “A Culture of Wellness.” We offered this pilot jointly for first-year medical students and faculty volunteers at the Geisel School of Medicine at Dartmouth. We gave participants the following: (1) time—60 minutes per week for 8 weeks; (2) tools—weekly cases highlighting evidence-based wellness strategies; and (3) permission—opportunities to discuss and apply the strategies personally and within their community. Results: Pre- and postsurvey results show that dedicated time combined with student-faculty collaboration and application of strategies was associated with significantly lower levels of burnout and perceived stress and higher levels of mindfulness and quality of life in participants. Components of the curriculum were reported by all to add value to personal well-being. Conclusions: This pilot presents a feasible and promising model that can be reproduced at other medical schools and disseminated to enhance personal health and promote a culture of well-being among medical students and faculty.