Substance P Mediates Excitatory Interactions between Striatal Projection Neurons

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Substance P mediates excitatory interactions between striatal projection neurons.

The striatum is the largest nucleus of the basal ganglia, and is crucially involved in motor control. Striatal projection cells are medium-size spiny neurons (MSNs) and form functional GABAergic synapses with other MSNs through their axon collaterals. A subpopulation of MSNs also release substance P (SP), but its role in MSN-MSN communication is unknown. We studied this issue in rat brain slice...

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Excitatory GABAergic effects in striatal projection neurons.

The ability of synaptically released GABA to facilitate action potential generation in striatal projection neurons was studied in brain slices using current-clamp, gramicidin-perforated whole cell recordings. Evoked GABAergic postsynaptic potentials (PSPs) were pharmacologically isolated with ionotropic glutamate receptor antagonists. Subthreshold depolarizing current injections were paired wit...

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Fast synaptic transmission between striatal spiny projection neurons.

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ژورنال

عنوان ژورنال: Journal of Neuroscience

سال: 2009

ISSN: 0270-6474,1529-2401

DOI: 10.1523/jneurosci.6020-08.2009