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Updated: Jan 25, 2026
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Dopamine Receptor Expression Among Local and Visual Cortex-Projecting Frontal Eye Field Neurons
Adrienne Mueller1, Rebecca M Krock1, Steven Shepard1
1Howard Hughes Medical Institute and Department of Neurobiology, Stanford University School of Medicine, Stanford, CA 94305, USA.
Cerebral Cortex (New York, N.Y. : 1991)
|May 1, 2019
Summary
Dopamine primarily influences attention by acting on frontal eye field (FEF) output neurons via D1 receptors. This reveals how dopamine modulates top-down visual attention pathways.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Dopamine Signaling
Background:
- Prefrontal cortex dopamine is crucial for attention.
- Frontal eye field (FEF) involvement in visual attention is known, but its dopaminergic circuitry is unclear.
Purpose of the Study:
- To investigate the expression of D1 and D2 dopamine receptors (D1Rs and D2Rs) in different classes of FEF neurons.
- To elucidate the specific neuronal targets of dopaminergic modulation within the FEF.
Main Methods:
- Comparative analysis of D1R and D2R expression across FEF neuronal types.
- Categorization of neurons based on projection targets (dorsal/ventral extrastriate cortex) and neurochemical markers (parvalbumin, calbindin).
Main Results:
- D1Rs and D2Rs are most abundant on pyramidal neurons, especially those with long-range projections.
- Pyramidal neurons show higher D1R expression than D2R expression.
- Inhibitory interneurons predominantly express D2Rs over D1Rs, with specific patterns for parvalbumin+ and calbindin+ interneurons.
- FEF neurons projecting to both dorsal and ventral extrastriate cortex primarily express D1Rs.
Conclusions:
- Dopamine directly modulates FEF output neurons.
- Dopaminergic modulation of top-down visual cortex projections is mainly mediated by D1Rs.
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