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444) In addition, the vmPFC group chose higher bets than healthy controls overall, an effect that correlated with lesion volume in the medial orbitofrontal cortex.
* Risk-sensitive decision-making in patients with posterior parietal and ventromedial prefrontal cortex injury.
- Successful choice under risk requires the integration of information about outcome probabilities and values and implicates a brain network including the ventromedial prefrontal cortex (vmPFC) and posterior parietal cortex (pPAR). Damage to the vmPFC is linked to poor decision-making and increased risk-taking. Electrophysiological and neuroimaging data implicate the pPAR in the processing of reward probability during choice, but the causal contribution of this area has not been established. We compared patients with lesions to the pPAR (n = 13), vmPFC (n = 13), and healthy volunteers (n = 22) on the Roulette Betting Task, a measure of risk-sensitive decision-making. Both lesion groups were impaired in adjusting their bets to the probability of winning. This impairment was correlated with the extent of pPAR, but not vmPFC, damage. In addition, the vmPFC group chose higher bets than healthy controls overall, an effect that correlated with lesion volume in the medial orbitofrontal cortex. Both lesion groups earned fewer points than healthy controls. The groups did not differ on 2 tasks assessing probabilistic reasoning outside of a risk-reward context. Our results demonstrate the causal involvement of both the pPAR and vmPFC in risk-sensitive choice and indicate distinguishable roles of these areas in probability processing and risk appetite.
=>趣旨, 結果, 影響, 効力, 活動, 印象, 効果, 成し遂げる
Overview of noun effect
The noun effect has 6 senses (first 5 from tagged texts)
1. (101) consequence, effect, outcome, result, event, issue, upshot -- (a phenomenon that follows
and is caused by some previous phenomenon; "the magnetic effect was greater when the rod was
lengthwise"; "his decision had depressing consequences for business"; "he acted very wise after the
event")
2. (11) impression, effect -- (an outward appearance; "he made a good impression"; "I wanted to
create an impression of success"; "she retained that bold effect in her reproductions of the
original painting")
3. (9) effect -- (an impression (especially one that is artificial or contrived); "he just did it
for effect")
4. (2) effect, essence, burden, core, gist -- (the central meaning or theme of a speech or literary
work)
5. (1) effect, force -- ((of a law) having legal validity; "the law is still in effect")
6. effect -- (a symptom caused by an illness or a drug; "the effects of sleep loss"; "the effect of
the anesthetic")
Overview of verb effect
The verb effect has 2 senses (first 2 from tagged texts)
1. (17) effect, effectuate, set up -- (produce; "The scientists set up a shock wave")
2. (3) effect -- (act so as to bring into existence; "effect a change")
--- WordNet end ---