Synaptic and behavioral profile of multiple glutamatergic inputs to the nucleus accumbens.

Synaptic and behavioral profile of multiple glutamatergic inputs to the nucleus accumbens.
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DOI:
10.1016/j.neuron.2012.09.040
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发表时间:
2012-11-21
期刊:
影响因子:
16.2
通讯作者:
Bonci A
Bonci A
中科院分区:
医学1区
文献类型:
--
作者:
Britt JP;Benaliouad F;McDevitt RA;Stuber GD;Wise RA;Bonci A

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Excitatory afferents to the nucleus accumbens (NAc) are thought to facilitate reward seeking by encoding reward-associated cues. Selective activation of different glutamatergic inputs to the NAc can produce divergent physiological and behavioral responses, but mechanistic explanations for these pathway-specific effects are lacking. Here, we compared the innervation patterns and synaptic properties of ventral hippocampus, basolateral amygdala, and prefrontal cortex input to the NAc. Ventral hippocampal input was found to be uniquely localized to the medial NAc shell, where it was predominant and selectively potentiated following cocaine exposure. In vivo, bidirectional optogenetic manipulations of this pathway attenuated and enhanced cocaine-induced locomotion. Challenging the idea that any of these inputs encode motivationally-neutral information, activation of each discrete pathway reinforced instrumental behaviors. Finally, direct optical activation of medium spiny neurons proved to be capable of supporting self-stimulation, demonstrating that behavioral reinforcement is an explicit consequence of strong excitatory drive to the NAc.
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