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Striatal responses to negative monetary outcomes differ between temperamentally inhibited and non-inhibited adolescents

HELFINSTEIN SM; BENSON YODY B; PEREZ EDGAR K; BAR-HAIM Y; DETLOFF A; PINE DS; FOX NA; ERNST M
NEUROPSYCHOLOGIA , 2011, vol. 49, n° 3, p. 479-485
Doc n°: 150336
Localisation : Accès réservé

D.O.I. : http://dx.doi.org/DOI:10.1016/j.neuropsychologia.2010.12.015
Descripteurs : AD6 - MANIFESTATIONS NEUROCOMPORTEMENTALES - FONCTIONS COGNITIVES

The present study compared blood oxygen level dependent (BOLD) response in
behaviorally inhibited and behaviorally non-inhibited adolescents to positive and
negative feedback following their choice in a reward task. Previous data in these
same subjects showed enhanced activation in striatal areas in behaviorally
inhibited subjects to cues predicting gain or a loss. However, no analyses had
examined responses following actual gains or losses. Relative to non-inhibited
subjects, behaviorally inhibited subjects in the current study showed enhanced
caudate response to negative but not positive feedback, indicating that striatal
sensitivity to feedback may be specific to aversive information. In addition,
compared to non-inhibited subjects, behaviorally inhibited subjects exhibited
reduced differentiation between positive and negative feedback in ventromedial
prefrontal cortex (vmPFC). This suggests a perturbed ability to encode reward
value.
CI - Copyright (c) 2010 Elsevier Ltd. All rights reserved.

Langue : ANGLAIS

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