Cognitive and brain consequences of conflict.

نویسندگان

  • Jin Fan
  • Jonathan I Flombaum
  • Bruce D McCandliss
  • Kathleen M Thomas
  • Michael I Posner
چکیده

Tasks involving conflict between stimulus dimensions have been shown to activate dorsal anterior cingulate and prefrontal areas. It has been proposed that the dorsal anterior cingulate is involved a domain general process of monitoring conflict, while prefrontal areas are involved in resolving conflict. We examine three tasks that all require people to respond based on one stimulus dimension while ignoring another conflicting dimension, but which vary in the source of conflict. One of the tasks uses language stimuli (Stroop effect) and two use nonlanguage spatial conflicts appropriate for children and nonhuman animals. In Experiment 1, 12 participants were studied with event-related functional magnetic resonance imaging (fMRI) while performing each of the three tasks. Reaction times for each of the three tasks were significantly longer in the incongruent condition compared with the congruent condition, demonstrating that each task elicits a conflict. By studying the same people in the same session, we test the hypothesis that conflict activates a similar brain network in the three tasks. Significant activations were found in the anterior cingulate and left prefrontal cortex for all three conflict tasks. Within these regions, the conflict component demonstrated evidence for significant common activation across the three tasks, although the peak activation point and spatial extent were not identical. Other areas demonstrated activation unique to each task. Experiments 2-4 provide behavioral evidence indicating considerable independence between conflict operations involved in the tasks. The behavioral and fMRI results taken together seem to argue against a single unified network for processing conflict, but instead support either distinct networks for each conflict task or a single network that monitors conflict with different sites used to resolve the conflict.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

An fMRI Study of Risky Decision Making: The Role of Mental Preparation and Conflict

Introduction: The current study aimed to elucidate the role of preparatory cognitive control in decision making and its neural correlates using functional Magnetic Resonance Imaging (fMRI). To this effect, by employing a series of new cognitive tasks, we assessed the role of preparatory cognitive control in monetary (risky) decision making. Methods: The participants had to decide between a...

متن کامل

Cognitive Patterns of Coma Patients Induced by Severe Traumatic Brain Injury in Working Memory

Background and Aim: Coma caused by severe traumatic brain injury, leads to cognitive function disorder, the most frequently affects being on the working memory. Because of the importance and direct impact of working memory on the quality of human life, especially in military skills that require active memory and high attentional power; the present study aimed to investigate the cognitive patter...

متن کامل

Investigating Cognitive Complications Following Of Mild Traumatic Brain Injury In Executive Function And Working Memory Of Patients

This research was designed and conducted to compare the cognitive condition of two groups of healthy people and MTBI patients one year after their injury in terms of both executive functions and working memory.In this causal-comparative study, which was conducted from February 2017 to October 2018, two groups of individuals, 48(MTBI), male Patients from 30 to 55 years old who were admitted to t...

متن کامل

بررسی کارکردهای شناختی اجرایی مغز در مردهای سیگاری و غیر سیگاری شهر تبریز در سال 1393: یک گزارش کوتاه

Background and Objective: Evaluation of neurocognitive mechanism involved in smoking can be helpful in the treatment of this dependence .The aim of this study was to compare the cognitive executive functions in frontal lobe of brain in male smokers and non-smokers. Materiasl and Methods: The method of research was causative-comparitive. In this regard, 40 male smokers and 40 male non-smokers...

متن کامل

The relationship between cognitive and metacognitive skills and work-family conflict in nurses

Introduction: The contradiction between the two roles of work and family in nurses is one that reduces their efAbstract Introduction: Conflict between the two roles of work and family in nurses is something that reduces their efficiency. The purpose of this study was to investigate the relationship between nurseschr('39') cognitive and metacognitive skills with work-family conflict. Methods: Th...

متن کامل

Comparison of visual perception error among patients with mild traumatic brain injury with healthy people

Background: Mild traumatic brain injury (MTBI) is the least brain injury due to direct or indirect blow to the head, which according to the Glasgow scale is given a score between 13 and 15. The findings indicate cognitive impairment. Perceptual dysfunction is one of the most important cognitive deficits in these patients. The present study was designed and performed to compare MTBI patients wit...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • NeuroImage

دوره 18 1  شماره 

صفحات  -

تاریخ انتشار 2003