Abstract:
:The contribution of basal ganglia outputs to consummatory behavior remains poorly understood. We recorded from the substantia nigra pars reticulata (SNR), the major basal ganglia output nucleus, during self-initiated drinking in mice. The firing rates of many lateral SNR neurons were time-locked to individual licks. These neurons send GABAergic projections to the deep layers of the orofacial region of the lateral tectum (superior colliculus, SC). Many tectal neurons were also time-locked to licking, but their activity was usually in antiphase with that of SNR neurons, suggesting inhibitory nigrotectal projections. We used optogenetics to selectively activate the GABAergic nigrotectal afferents in the deep layers of the SC. Photo-stimulation of the nigrotectal projections transiently inhibited the activity of the lick-related tectal neurons, disrupted their licking-related oscillatory pattern and suppressed self-initiated drinking. These results demonstrate that GABAergic nigrotectal projections have a crucial role in coordinating drinking behavior.
journal_name
Nat Neuroscijournal_title
Nature neuroscienceauthors
Rossi MA,Li HE,Lu D,Kim IH,Bartholomew RA,Gaidis E,Barter JW,Kim N,Cai MT,Soderling SH,Yin HHdoi
10.1038/nn.4285subject
Has Abstractpub_date
2016-05-01 00:00:00pages
742-748issue
5eissn
1097-6256issn
1546-1726pii
nn.4285journal_volume
19pub_type
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