2013年2月19日火曜日

Category-dependent and category-independent goal-value codes in human ventromedial prefrontal cortex


Daniel McNamee, Antonio Rangel & John P O'Doherty
Nature Neuroscience (2013) doi:10.1038/nn.3337
Received 03 December 2012 Accepted 24 January 2013 Published online 17 February 2013

O'DohertyラボからNature Neurosci. 異なる財の間で選択を行うためには、財の種類に依らず価値(効用)を表象している脳部位が必要。本当に存在するのかfMRI Multi Voxel Pattern Analysisで検証。前頭前野内側部に存在する。

ぼくも後に続きたい。まだまだ道は長いけど。

To choose between manifestly distinct options, it is suggested that the brain assigns values to goals using a common currency. Although previous studies have reported activity in ventromedial prefrontal cortex (vmPFC) correlating with the value of different goal stimuli, it remains unclear whether such goal-value representations are independent of the associated stimulus categorization, as required by a common currency. Using multivoxel pattern analyses on functional magnetic resonance imaging (fMRI) data, we found a region of medial prefrontal cortex to contain a distributed goal-value code that is independent of stimulus category. More ventrally in the vmPFC, we found spatially distinct areas of the medial orbitofrontal cortex to contain unique category-dependent distributed value codes for food and consumer items. These results implicate the medial prefrontal cortex in the implementation of a common currency and suggest a ventral versus dorsal topographical organization of value signals in the vmPFC.

0 件のコメント:

コメントを投稿