Fifty-eight women with anorexia or bulimia nervosa were compared with 24 normal women on measures of defense style and parental bonding. Results indicated that all eating-disorder subtypes exhibit more primitive defenses and fewer mature ones than controls. Eating-disorder patients uniformly recalled less paternal empathy than controls. Thus, difficulties involving object representations of fathers may be a theme common to eating disorders. No major differences were identified among eating-disorder subtypes, suggesting that these disorders share substantial psychodynamic features. Patterns of parental bonding were associated with defense styles in a manner consistent with theories that link defense style development to early object relationships.Recent findings suggest a substantial "interface" between eating and personality disorders. Many studies have found eating-disorder (ED) patients who binge and purge (whether they be anorexic or normal in weight) to exhibit "borderline" personality traits: among them mood lability, self-destructiveness, and other impulse-dysregulation problems. Conversely, anorexic patients who solely restrict food intake (without binging) tend to be overcontrolled or "ob-

Clinical depression commonly emerges in adolescence, which is also a time of developing cognitive ability and related large-scale functional brain networks implicated in depression. In depressed adults, abnormalities in the dynamic functioning of frontoinsular networks, in particular, have been observed and linked to negative rumination. Thus, network dynamics may provide new insight into teen pathophysiology. Here, adolescents (n = 45, ages 13-19) with varying severity of depressive symptoms completed a resting-state functional MRI scan. Functional networks were evaluated using co-activation pattern analysis to identify whole-brain states of spatial co-activation that recurred across participants and time. Measures included: dwell time (proportion of scan spent in that network state), persistence (volume-to-volume maintenance of a network state), and transitions (frequency of moving from state A to state B). Analyses tested associations between depression or trait rumination and dynamics of network states involving frontoinsular and default network systems. Results indicated that adolescents showing increased dwell time in, and persistence of, a frontoinsular-default network state involving insula, dorsolateral and medial prefrontal cortex, and posterior regions of default network, reported more severe symptoms of depression. Further, adolescents who transitioned more frequently between the frontoinsular-default state and a prototypical default network state reported higher depression. Increased dominance and transition frequency of frontoinsular-default network states were also associated with higher rumination, and rumination mediated the associations between network dynamics and depression. Findings support a model in which abnormal frontoinsular dynamics confer vulnerability to maladaptive introspection, which in turn contributes to symptoms of adolescent depression.

To evaluate various psychological constructs used in formulations of anorexia and bulimia nervosa, we compared 76 eating‐disordered, 20 psychiatric, and 24 normal women on measures of irrational cognitions, object‐relations disturbances, and defense styles. The eating‐disordered groups exhibited more disturbance on all measures than normals and many pathological elevations relative to psychiatric controls. Despite these differences, common qualitative features were identified in all patient groups, suggesting that formulations based on the factors examined alone, while useful in providing an understanding of patients' issues, will be inadequate to account for eating‐disorder development.