Abstract:
:The activity of single units in the striatum of urethane-anesthetized rats was recorded before and after the systemic administration of 7-nitro-indazole (7-NI; 50 mg/kg intraperitoneally), a selective inhibitor of neuronal nitric oxide (NO) synthase. Two neuronal types were clearly distinguishable electrophysiologically, on the basis of either discharge frequency pattern or features of the individual spike waveform (spike duration, negative phase/total duration ratio, and negative phase/total amplitude ratio). Only sporadically discharging neurons (basal firing rate, <0.1 spikes/s) were influenced by 7-NI, which caused a statistically significant increase in their firing rate. In contrast, the activity of continuously discharging neurons (basal firing rate, 4-6 spikes/s) was not affected. We hypothesize that NO neurotransmission could exert a tonic inhibitory influence upon sporadically discharging striatal neurons, which are presumably striatal output neurons.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Sardo P,Ferraro G,Di Giovanni G,Galati S,La Grutta Vdoi
10.1016/s0304-3940(02)00270-7keywords:
subject
Has Abstractpub_date
2002-06-14 00:00:00pages
179-82issue
3eissn
0304-3940issn
1872-7972pii
S0304394002002707journal_volume
325pub_type
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