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1.  The Effects of Anxiety and Depression on Weekly Pain in Women with Arthritis 
Pain  2008;138(2):354-361.
This study examined the effects of anxiety and depression on pain in women with rheumatoid arthritis (RA; n = 82) or osteoarthritis (OA; n = 88). Anxiety and depression symptoms were assessed at the beginning of the study. Arthritis pain, interpersonal stress, negative affect, and positive affect were assessed weekly for 11 consecutive weeks. Multilevel analyses were conducted to investigate direct, indirect, and interactive effects of anxiety and depression on weekly changes in pain. When entered separately into the prediction equations, anxiety and depression were both related to elevations in current and next week pain, although the effects were nearly twice as large for anxiety. In addition, both anxiety and depression were indirectly related to current pain through negative and positive affect and depression interacted with stress to predict current pain in the RA group. When entered together into the prediction equations, anxiety alone was still related to elevations in current and next week pain. In addition, anxiety alone was indirectly related to current pain through negative affect and depression alone was indirectly related to current pain through positive affect. These results highlight the need for careful study of the differential effects of anxiety and depression and treatments that target their unique mechanisms.
doi:10.1016/j.pain.2008.01.008
PMCID: PMC2684788  PMID: 18289792
pain; arthritis; anxiety; depression; arthritis; women
2.  Combined effects of Hurricane Katrina and Hurricane Gustav on the mental health of mothers of small children 
Few studies assessed the results of multiple exposures to disaster. Our objective was to examine the effect of experiencing Hurricane Gustav on mental health of women previously exposed to Hurricane Katrina. 102 women from Southern Louisiana were interviewed by telephone. Experience of the hurricanes was assessed with questions about injury, danger, and damage, while depression was assessed with the Edinburgh Depression Scale and post-traumatic stress disorder (PTSD) using the Post-traumatic Checklist. Minor stressors, social support, trait resilience, and perceived benefit had been measured previously. Mental health was examined with linear and log-linear models. Women who had a severe experience of both Gustav and Katrina scored higher on the mental health scales, but finding new ways to cope after Katrina or feeling more prepared was not protective. About half the population had better mental health scores after Gustav than at previous measures. Improvement was more likely among those who reported high social support or low levels of minor stressors, or were younger. Trait resilience mitigated the effect of hurricane exposure. Multiple disaster experiences are associated with worse mental health overall, though many women are resilient. Perceiving benefit after the first disaster was not protective.
doi:10.1111/j.1365-2850.2010.01658.x
PMCID: PMC3472438  PMID: 21418428
disaster; depression; post-traumatic stress disorder; women
3.  Response to Emotional Expressions in Generalized Social Phobia and Generalized Anxiety Disorder: Evidence for Separate Disorders 
The American journal of psychiatry  2008;165(9):1193-1202.
Objective
Generalized social phobia involves fear/avoidance, specifically of social situations, whereas generalized anxiety disorder involves intrusive worry about diverse circumstances. It remains unclear the degree to which these two, often comorbid, conditions represent distinct disorders or alternative presentations of a single, core underlying pathology. Functional magnetic resonance imaging assessed the neural response to facial expressions in generalized social phobia and generalized anxiety disorder.
Method
Individuals matched on age, IQ, and gender with generalized social phobia without generalized anxiety disorder (N=17), generalized anxiety disorder (N= 17), or no psychopathology (N=17) viewed neutral, fearful, and angry expressions while ostensibly making a simple gender judgment.
Results
The patients with generalized social phobia without generalized anxiety disorder showed increased activation to fearful relative to neutral expressions in several regions, including the amygdala, compared to healthy individuals. This increased amygdala response related to self-reported anxiety in patients with generalized social phobia without generalized anxiety disorder. In contrast, patients with generalized anxiety disorder showed significantly less activation to fearful relative to neutral faces compared to the healthy individuals. They did show significantly increased response to angry expressions relative to healthy individuals in a lateral region of the middle frontal gyrus. This increased lateral frontal response related to self-reported anxiety in patients with generalized anxiety disorder.
Conclusions
These results suggest that neural circuitry dysfunctions differ in generalized social phobia and generalized anxiety disorder.
doi:10.1176/appi.ajp.2008.07071060
PMCID: PMC2855133  PMID: 18483136
4.  Neural Substrates of Reward Magnitude, Probability, and Risk During a Wheel of Fortune Decision-Making Task 
NeuroImage  2008;44(2):600-609.
Economic decision-making involves the weighting of magnitude and probability of potential gains/losses. While previous work has examined the neural systems involved in decision-making, there is a need to understand how the parameters associated with decision-making (e.g., magnitude of expected reward, probability of expected reward and risk) modulate activation within these neural systems. In the current fMRI study, we modified the monetary wheel of fortune (WOF) task (Ernst et al., 2004) to examine in 25 healthy young adults the neural responses to selections of different reward magnitudes, probabilities, or risks. Selection of high, relative to low, reward magnitude increased activity in insula, amygdala, middle and posterior cingulate cortex, and basal ganglia. Selection of low-probability, as opposed to high-probability reward, increased activity in anterior cingulate cortex, as did selection of risky, relative to safe reward. In summary, decision-making that did not involve conflict, as in the magnitude contrast, recruited structures known to support the coding of reward values, and those that integrate motivational and perceptual information for behavioral responses. In contrast, decision-making under conflict, as in the probability and risk contrasts, engaged the dorsal anterior cingulate cortex whose role in conflict monitoring is well established. However, decision-making under conflict failed to activate the structures that track reward values per se. Thus, the presence of conflict in decision-making seemed to significantly alter the pattern of neural responses to simple rewards. In addition, this paradigm further clarifies the functional specialization of the cingulate cortex in processes of decision-making.
doi:10.1016/j.neuroimage.2008.08.016
PMCID: PMC2695942  PMID: 18804540

Results 1-4 (4)