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. 1989 Nov;86(22):9015–9019. doi: 10.1073/pnas.86.22.9015

Dopamine synaptic complex with pyramidal neurons in primate cerebral cortex.

P S Goldman-Rakic 1, C Leranth 1, S M Williams 1, N Mons 1, M Geffard 1
PMCID: PMC298423  PMID: 2573073

Abstract

Dopamine (DA)-containing projections to the cerebral cortex are considered to play an important role in cognitive processes. Using a recently developed monoclonal antiserum directed against DA and an antibody directed against tyrosine hydroxylase in combination with Golgi impregnation and electron microscopy, we have observed that DA and tyrosine hydroxylase afferents establish symmetric membrane specializations with the soma, dendritic shafts, and spines of identified pyramidal cells in the prefrontal, cingulate, and motor cortex of primates. The axospinous contacts invariably formed part of a synaptic complex in which the dendritic spine of a pyramidal neuron was the target of both a DA-positive symmetric and an unlabeled asymmetric bouton. This arrangement allows direct DA modulation of the overall excitability of cortical projection neurons by altering local spine responses to excitatory inputs.

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