Distinct prestimulus and poststimulus activation of VTA neurons correlates with stimulus detection.
Distinct prestimulus and poststimulus activation of VTA neurons correlates with stimulus detection.
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VTA 神经元的不同刺激前和刺激后激活与刺激检测相关。
DOI:
10.1152/jn.00784.2012
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发表时间:
2013
影响因子:
2.5
通讯作者:
Moghaddam,Bita
中科院分区:
文献类型:
--
作者:
Totah,NelsonKB;Kim,Yunbok;Moghaddam,Bita
Dopamine neurons of the ventral tegmental area (VTA) signal the occurrence of a reward-predicting conditioned stimulus (CS) with a subsecond duration increase in post-CS firing rate. Important theories about reward-prediction error and reward expectancy have been informed by the substantial number of studies that have examined post-CS phasic VTA neuron activity. On the other hand, the role of VTA neurons in anticipation of a reward-predicting CS and analysis of prestimulus spike rate rarely has been studied. We recorded from the VTA in rats during the 3-choice reaction time task, which has a fixed-duration prestimulus period and a difficult-to-detect stimulus. Use of a stimulus that was difficult to detect led to behavioral errors, which allowed us to compare VTA activity between trials with correct and incorrect stimulus-guided choices. We found a sustained increase in firing rate of both putative dopamine and GABA neurons during the pre-CS period of correct and incorrect trials. The poststimulus phasic response, however, was absent on incorrect trials, suggesting that the stimulus-evoked phasic response of dopamine neurons may relate to stimulus detection. The prestimulus activation of VTA neurons may modulate cortical systems that represent internal states of stimulus expectation and provide a mechanism for dopamine neurotransmission to influence preparatory attention to an expected stimulus.
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影响因子:
5.3
作者:
E. B. Pragay;A. Mirsky;R. K. Nakamura
通讯作者:
R. K. Nakamura
DOI:
--
发表时间:
1973
期刊:
Nature: New biology
影响因子:
--
作者:
B. Bunney;G. Aghajanian;R. Roth
通讯作者:
R. Roth
影响因子:
2.9
作者:
O. Lindvall;A. Björklund;I. Divac
通讯作者:
I. Divac
影响因子:
4.7
作者:
Ryan D Ward;C. Kellendonk;E. Kandel;P. Balsam
通讯作者:
P. Balsam
影响因子:
5.3
作者:
Pan, WX;Schmidt, R;Hyland, BI
通讯作者:
Hyland, BI