WOBIB: 20 - Johnson, et al. (2002) Neural correlates of ...
 
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Sterling C. Johnson; Leslie C. Baxter; Lana S. Wilder; James G. Pipe; Joseph E. Heiserman; George P. Prigatano. Neural correlates of self-reflection. Brain 125(Pt 8):1808-14, 2002. PMID: 12135971. WOBIB: 20.

The capacity to reflect on one's sense of self is an important component of self-awareness. In this paper, we investigate some of the neurocognitive processes underlying reflection on the self using functional MRI. Eleven healthy volunteers were scanned with echoplanar imaging using the blood oxygen level-dependent contrast method. The task consisted of aurally delivered statements requiring a yes-no decision. In the experimental condition, participants responded to a variety of statements requiring knowledge of and reflection on their own abilities, traits and attitudes (e.g. 'I forget important things', 'I'm a good friend', 'I have a quick temper'). In the control condition, participants responded to statements requiring a basic level of semantic knowledge (e.g. 'Ten seconds is more than a minute', 'You need water to live'). The latter condition was intended to control for auditory comprehension, attentional demands, decision-making, the motoric response, and any common retrieval processes. Individual analyses revealed consistent anterior medial prefrontal and posterior cingulate activation for all participants. The overall activity for the group, using a random-effects model, occurred in anterior medial prefrontal cortex (t = 13.0, corrected P = 0.05; x, y, z, 0, 54, 8, respectively) and the posterior cingulate (t = 14.7, P = 0.02; x, y, z, -2, -62, 32, respectively; 967 voxel extent). These data are consistent with lesion studies of impaired awareness, and suggest that the medial prefrontal and posterior cingulate cortex are part of a neural system subserving self-reflective thought.

Asymmetry: -0.55793 (left: -1, right: +1)

VRML2 file (131 Kb)

1 Subject 1: Answering self-reflective questions versus answering semantic questions. Self-reflective and semantic yes/no questions posed through headphones were answered with button press. WOEXP: 54.
2 Subject 2: Answering self-reflective questions versus answering semantic questions. Self-reflective and semantic yes/no questions posed through headphones were answered with button press. WOEXP: 55.
3 Subject 3: Answering self-reflective questions versus answering semantic questions. Self-reflective and semantic yes/no questions posed through headphones were answered with button press. WOEXP: 56.
4 Subject 4: Answering self-reflective questions versus answering semantic questions. Self-reflective and semantic yes/no questions posed through headphones were answered with button press. WOEXP: 57.
5 Subject 5: Answering self-reflective questions versus answering semantic questions. Self-reflective and semantic yes/no questions posed through headphones were answered with button press. WOEXP: 58.
6 Subject 6: Answering self-reflective questions versus answering semantic questions. Self-reflective and semantic yes/no questions posed through headphones were answered with button press. WOEXP: 59.
7 Subject 7: Answering self-reflective questions versus answering semantic questions. Self-reflective and semantic yes/no questions posed through headphones were answered with button press. WOEXP: 60.
8 Subject 8: Answering self-reflective questions versus answering semantic questions. Self-reflective and semantic yes/no questions posed through headphones were answered with button press. WOEXP: 61.
9 Subject 9: Answering self-reflective questions versus answering semantic questions. Self-reflective and semantic yes/no questions posed through headphones were answered with button press. WOEXP: 62.
10 Subject 10: Answering self-reflective questions versus answering semantic questions. Self-reflective and semantic yes/no questions posed through headphones were answered with button press. WOEXP: 63.
11 Subject 11: Answering self-reflective questions versus answering semantic questions. Self-reflective and semantic yes/no questions posed through headphones were answered with button press. WOEXP: 64.
12 Group: Answering self-reflective questions versus answering semantic questions. Self-reflective and semantic yes/no questions posed through headphones were answered with button press. WOEXP: 65.


corner cube of WOBIB_20

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