Lab
The Grady Trauma Project
Institution: Emory University
Department: Department of Psychiatry and Behavioral Sciences
About the lab
The Grady Trauma Project is a group of investigators studying civilian trauma based at Grady Memorial Hospital and Emory University School of Medicine in Atlanta, Georgia. The project focuses on Post-Traumatic Stress Disorder and the clinical and physiological implications of trauma exposure.
Featured research (19)
Appraisal of trauma is a critical factor in the development of impairing post-traumatic stress symptoms, such as dissociation. Individuals may appraise trauma as morally injurious (i.e., moral injury exposure [MIE]) and experience subsequent moral distress related to this exposure (i.e., moral injury distress [MID]). To date, however, investigation into the relations between moral injury appraisals and dissociation has been limited, particularly within community populations. This study investigated MIE and MID in relation to six facets of dissociation (disengagement, depersonalization, derealization, memory disturbances, emotional constriction, identity dissociation) in a sample of trauma-exposed community members (n = 177, 58.2% Black, 89.3% female) recruited from a public hospital and/or community advertisements. Participants completed measures assessing trauma exposure, MIE, MID, dissociation, and posttraumatic stress disorder (PTSD) symptoms. Partial correlation analyses revealed that after controlling for PTSD symptoms, MIE was correlated with disengagement, r = .23, p ≤ .025, and depersonalization, r = .25, p ≤ .001, and MID was correlated with depersonalization, r = .19, p ≤ .025. Sex moderated each association, with stronger associations observed for female participants. Findings suggest that moral injury appraisals are linked to more severe dissociative symptoms among female civilians, and as such, may need to be specifically targeted in empirically supported treatments.
Resilience is a dynamic process of recovery after trauma, but in most studies it is conceptualized as the absence of specific psychopathology following trauma. Using the large emergency department AURORA study (n=1,865, 63% women), we took a longitudinal, dynamic and transdiagnostic approach to define a static resilience (r) factor, that could explain >50% of variance in mental wellbeing 6-months following trauma, and a dynamic r-factor, which represented recovery from initial symptoms. We assessed its neurobiological profile across threat, inhibition, and reward processes using fMRI collected 2-weeks post-trauma. Our neuroimaging results suggest that resilience is promoted by activation of higher-level cognitive functioning and salience network regions in response to reward, whereas resilience is hampered by top-down attention and default mode network activation to threat and reward. These findings serve to redefine the concept of resilience as both dynamic and multifaceted, and identify mechanisms that promote resilience after trauma for early interventions.
Black individuals are at particularly high risk for birth-related posttraumatic stress disorder (PTSD) symptoms, in part due to a lack of opportunity to lead maternity care decisions. Maternal care providers need evidence-based ways to reduce pregnant persons' risk for birth-related PTSD symptoms despite reduced autonomy in decision making resulting from heightened restrictions on reproductive rights. We investigated whether a potential relation between autonomy in decision making and birth-related PTSD symptoms would be moderated by being mistreated or feeling respected by maternity care providers in a community sample of Black women (N = 52; Mage = 28.2 years, SDage = 5.7 years) seeking maternity care at a public hospital in the southeastern United States. At six weeks postpartum, participants completed measures assessing autonomy in decision making, current birth-related PTSD symptoms, number of mistreatment events, and feelings of respect from providers during pregnancy, childbirth, and the postpartum period. Autonomy in decision making was negatively correlated with birth-related PTSD symptoms, r=-.43, p < .01. An interaction between autonomy in decision making and mistreatment by providers was trending toward significance, B=-.23, SE=.14, p = .10. Autonomy in decision making and feeling respected by maternity care provider interacted to predict birth-related PTSD symptoms, B = .05, SE=.01, p < .01. Feeling respected by providers may buffer against the negative effects of lack of autonomy in decision making on birth-related PTSD symptoms, highlighting the importance of providers' ability to convey respect to pregnant patients when they cannot lead care decisions.
Background:
Dissociative symptoms can emerge after trauma and interfere with attentional control and interoception; disruptions to these processes are barriers to mind-body interventions such as breath-focused mindfulness (BFM). To overcome these barriers, we tested the use of an exteroceptive augmentation to BFM, using vibrations equivalent to the amplitude of the auditory waveform of the actual breath, delivered via a wearable subwoofer in real time (VBFM). We tested whether this device enhanced interoceptive processes, attentional control and autonomic regulation in trauma-exposed women with dissociative symptoms.
Methods:
65 women, majority (82%) Black American, aged 18-65 completed self-report measures of interoception and 6 BFM sessions, during which electrocardiographic recordings were taken to derive high-frequency heart rate variability (HRV) estimates. A subset (n = 31) of participants completed functional MRI at pre- and post-intervention, during which they were administered an affective attentional control task.
Results:
Compared to those who received BFM only, women who received VBFM demonstrated greater increases in interoception, particularly their ability to trust body signals, increased sustained attention, as well as increased connectivity between nodes of emotion processing and interoceptive networks. Intervention condition moderated the relationship between interoception change and dissociation change, as well as the relationship between dissociation and HRV change.
Conclusions:
Vibration feedback during breath focus yielded greater improvements in interoception, sustained attention and increased connectivity of emotion processing and interoceptive networks. Augmenting BFM with vibration appears to have considerable effects on interoception, attention and autonomic regulation; it could be used as a monotherapy or to address trauma treatment barriers.
Background:
Dissociative and posttraumatic stress disorder (PTSD) symptoms are commonly co-occurring responses to psychological trauma. Yet, these two groups of symptoms appear to be related to diverging patterns of physiological response. To date, few studies have examined how specific dissociative symptoms, namely, depersonalization and derealization, relate to skin conductance response (SCR), a marker of autonomic function, within the context of PTSD symptoms. We examined associations among depersonalization, derealization, and SCR during two conditions - resting control and breath-focused mindfulness - in the context of current PTSD symptoms.
Methods:
Sixty-eight trauma-exposed women (82.4% Black; Mage = 42.5, SDage = 12.1) were recruited from the community for a breath-focused mindfulness study. SCR data were collected during alternating resting control and breath-focused mindfulness conditions. Moderation analyses were conducted to examine relations among dissociative symptoms, SCR, and PTSD for these different conditions.
Results:
Moderation analyses revealed that depersonalization was linked to lower SCR during resting control, B = 0.0005, SE = 0.0002, p = .006, in participants low-to-moderate PTSD symptoms; however, depersonalization was associated with higher SCR during breath-focused mindfulness, B = -0.0006, SE = 0.0003, p = .029, in individuals with similar levels of PTSD symptoms. No significant interaction between derealization and PTSD symptoms on SCR was observed.
Conclusions:
Depersonalization symptoms may associate with physiological withdrawal during rest, but greater physiological arousal during effortful emotion regulation in individuals with low-to moderate levels of PTSD, which has significant implications for barriers to treatment engagement as well as treatment selection in this population.
Lab head

Department
- Department of Psychiatry and Behavioral Sciences
About Abigail Powers Lott
- I am an Assistant Professor at Emory University and the Co-Director of the Grady Trauma Project, a team focused on examining risk and resiliency factors for PTSD and other trauma-related disorders in marginalized civilian populations. I incorporate clinical, behavioral, physiological, and other biological measurement in my research to assist in better identifying clear mechanisms that may be targeted in treatment and improve psychiatric outcomes among trauma-exposed individuals.
Members (19)
Michael R. Nash
Nicholas Massa
H. Drew Dixon
Sean Minton
Alfonsina Guelfo

meghna Ravi

Brandy Bernabe

Madison McCullough