Figure 5From: Contribution of different classes of glutamate receptors in the corticostriatal polysynaptic responses from striatal direct and indirect projection neuronsDifferences between dSPNs and iSPNs observed during corticostriatal synaptic integration are undetectable during intrastriatal stimulation. A: Corticostriatal responses evoked with increasing stimulus strengths until suprathreshold responses reach repetitive firing in a dSPN (red record). B: Responses to intrastriatal stimulation with the same stimulus in the same dSPN. Inset: scheme illustrating positions of stimulation electrodes. C: Corticostriatal responses evoked with increasing stimulus strengths until suprathreshold responses reach a brief spike burst in an iSPN (green record). Inset: a superimposition of corticostriatal responses in dSPNs and iSPNs. D: Responses to intrastriatal stimulus evoked with the same stimulus. Inset: a superimposition of suprathreshold responses to intrastriatal stimulus in dSPN and iSPN neurons. E: Superimposition of responses to cortical and intrastriatal stimulus in dSPNs. F: Superimposition of responses to cortical and intrastriatal stimulus in iSPNs. G: Histograms comparing response areas, amplitudes, and duration at half amplitude (mean ± SEM). Note that only corticostriatal responses allow distinguish between dSPNs and iSPNs.Back to article page