Intimate Partner Violence PTSD and Neural Correlates of Inhibition

Posttraumatic stress disorder (PTSD) has been linked to deficits in response inhibition, and neuroimaging research suggests this may be due to differences in prefrontal cortex recruitment. The current study examined relationships between PTSD from intimate partner violence (IPV) and neural responses...

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Published inJournal of traumatic stress Vol. 29; no. 1; pp. 33 - 40
Main Authors Aupperle, Robin L., Stillman, Ashley N., Simmons, Alan N., Flagan, Taru, Allard, Carolyn B., Thorp, Steven R., Norman, Sonya B., Paulus, Martin P., Stein, Murray B.
Format Journal Article
LanguageEnglish
Published United States Blackwell Publishing Ltd 01.02.2016
Wiley Subscription Services, Inc
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Summary:Posttraumatic stress disorder (PTSD) has been linked to deficits in response inhibition, and neuroimaging research suggests this may be due to differences in prefrontal cortex recruitment. The current study examined relationships between PTSD from intimate partner violence (IPV) and neural responses during inhibition. There were 10 women with PTSD from IPV and 12 female control subjects without trauma history who completed the stop signal task during functional magnetic resonance imaging. Linear mixed models were used to investigate group differences in activation (stop–nonstop and hard–easy trials). Those with PTSD exhibited greater differential activation to stop–nonstop trials in the right dorsolateral prefrontal cortex and the anterior insula and less differential activation in several default mode regions (d = 1.12–1.22). Subjects with PTSD exhibited less differential activation to hard–easy trials in the lateral frontal and the anterior insula regions (driven by less activation to hard trials) and several default mode regions (i.e., medial prefrontal cortex, posterior cingulate; driven by greater activation to easy trials; d = 1.23–1.76). PTSD was associated with difficulties disengaging default mode regions during cognitive tasks with relatively low cognitive demand, as well as difficulties modulating executive control and salience processing regions with increasing cognitive demand. Together, these results suggest that PTSD may relate to decreased neural flexibility during inhibition. Resumen Spanish s by the Asociación Chilena de Estrés Traumático (ACET) TEPT Y CORRELATOS NEURONALES DE INHIBICIÓN El trastorno por estrés postraumático (TEPT) se ha vinculado con déficits en la inhibición de la respuesta y la investigación en neuroimágenes sugiere que ésto puede deberse a diferenciasen del reclutamiento de la corteza prefrontal. El presente estudio examinó las relaciones entre TEPT por violencia de pareja y respuestas neuronales durante la inhibición. Participaron 10 mujeres con TEPT por violencia de pareja y 12 mujeres de control sin historia de trauma que completaron la tarea de señal de detención durante registro de resonancia magnética funcional. Se usaron modelos lineales mixtos para investigar diferencias de grupos en la activación (pruebas de ir‐no ir y difícil‐fácil). Aquellas con TEPT mostraron mayor activación diferencial en la corteza prefrontal dorso lateral derecha e ínsula anterior en la prueba ir‐No ir y menor activación diferencial en varias regiones de modo por defecto (d = 1,12 a 1,22). Los sujetos con TEPT mostraron menor activación diferencial en las regiones frontal lateral e ínsula anterior a las pruebas Difícil‐Fácil (debido a una menor activación para Difícil) y varias regiones de modo por defecto (ej., corteza prefrontal medial, cingulado posterior; debido a una mayor activación para Fácil; d = 1,23 a 1,76). El TEPT se asoció con dificultades en el desenganche de las regiones de modo por defecto durante las tareas cognitivas con demanda cognitiva relativamente baja, así como también dificultades en la modulación del control ejecutivo y regiones de procesamiento de rasgos sobresalientes con demanda cognitiva creciente. En conjunto, estos resultados sugieren que el TEPT puede relacionarse con una menor flexibilidad neuronal durante la inhibición. 抽象 Traditional and Simplified Chinese s by AsianSTSS Traditional Chinese 標題: 親密伴侶暴力構成的PTSD和抑制的神經關聯 撮要: 過往研究發現創傷後壓力症(PTSD)跟欠缺反應抑制有關。神經成像研究指出, 那可能是由於前額皮質的功能差異而成。本研究檢視因親密伴侶暴力構成的PTSD跟抑制時神經反應的關係。研究包含10名因親密伴侶暴力而患PTSD的女性, 以及12名無創傷經歷的女性為對照。她們接受功能性磁振造影時進行停止訊號作業。我們採用線性混合模型, 檢視不同組別 (在停止與不停止試驗、難易試驗) 的激活差異。在停止與不停止試驗中, 有PTSD的人在右邊背外側前額葉皮層和前部島葉展現較大的差別激活, 並在數個默認模式神經區展現較少差別激活(d = 1.12 至 1.22)。在難易試驗中, 有PTSD的人在以下區域展現較少差別激活:前側部及前部島葉區 (由於對「難」有較少激活) 、和數個默認模式神經區 (內側前額葉皮質、後扣帶區;由於對「易」有較大激活;d = 1.23 至 1.76)。在認知要求較低的認知作業裡, PTSD跟有困難擺脫默認模式神經區有關;當認知要求提升, PTSD跟有困難調節執行操控和調節特殊性處理區有關。研究結果反映, PTSD可能跟抑制時神經彈性減低有關。 Simplified Chinese 标题: 亲密伴侣暴力构成的PTSD和抑制的神经关联 撮要: 过往研究发现创伤后压力症(PTSD)跟欠缺反应抑制有关。神经成像研究指出, 那可能是由于前额皮质的功能差异而成。本研究检视因亲密伴侣暴力构成的PTSD跟抑制时神经反应的关系。研究包含10名因亲密伴侣暴力而患PTSD的女性, 以及12名无创伤经历的女性为对照。她们接受功能性磁振造影时进行停止讯号作业。我们采用线性混合模型, 检视不同组别 (在停止与不停止试验、难易试验) 的激活差异。在停止与不停止试验中, 有PTSD的人在右边背外侧前额叶皮层和前部岛叶展现较大的差别激活, 并在数个默认模式神经区展现较少差别激活(d = 1.12 至 1.22)。在难易试验中, 有PTSD的人在以下区域展现较少差别激活:前侧部及前部岛叶区 (由于对「难」有较少激活) 、和数个默认模式神经区 (内侧前额叶皮质、后扣带区;由于对「易」有较大激活;d = 1.23 至 1.76)。在认知要求较低的认知作业里, PTSD跟有困难摆脱默认模式神经区有关;当认知要求提升, PTSD跟有困难调节执行操控和调节特殊性处理区有关。研究结果反映, PTSD可能跟抑制时神经弹性减低有关。
Bibliography:Development Award and a Department of Defense
istex:C571E92D20D69C8441B855B5124D4B5B8360AB5D
ark:/67375/WNG-GFDXZ317-V
Department of Veterans Affairs (Merit Award to MBS)
VA Merit Awards
ArticleID:JTS22068
This study was funded by the Department of Veterans Affairs (Merit Award to MBS). Dr. Thorp is funded by a VA Career Development Award and a Department of Defense grant. Drs. Paulus, Simmons, and Norman are funded by VA Merit Awards.
We would like to acknowledge the contributions of Michelle Behrooznia, Shadha Cissell, Erin Grimes, Kelly Hughes‐Berardi, Lindsay Reinhardt, and Sarah Sullivan, towards coordinating the study, recruiting subjects, and/or collecting behavioral and fMRI data. We would also like to acknowledge the contribution of Greg Fonzo, in creating the anatomical masks used for fMRI region‐of‐interest analyses.
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SourceType-Scholarly Journals-1
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ISSN:0894-9867
1573-6598
DOI:10.1002/jts.22068