Dopamine modulates processing speed in the human mesolimbic system
Dopamine modulates processing speed in the human mesolimbic system
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DOI:
10.1016/j.neuroimage.2012.11.001
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发表时间:
2013-02-01
期刊:
影响因子:
5.7
通讯作者:
Bunzeck, Nico
中科院分区:
文献类型:
--
作者:
Eckart, Cindy;Bunzeck, Nico
Neural activity in mesolimbic brain regions scales with stimulus novelty but the mechanistic role of neurotransmitters in this process remains unclear. Here, we used magnetoencephalography together with psychopharmacological stimulation in healthy humans to demonstrate that the neuronal dynamics of novelty processing are temporally adaptive and flexible. In particular, enhanced dopaminergic (150 mg levodopa) - but not cholinergic (8 mg galantamine) - neurotransmission accelerated the onset of novelty signals within the medial temporal lobe (MTL) from similar to 300 to