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Related Experiment Video

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Determination of Mitochondrial Membrane Potential and Reactive Oxygen Species in Live Rat Cortical Neurons
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Corticostriatal cells identified by the peroxidase method.

J C Hedreen1

  • 1Department of Anatomy, Johns Hopkins University School of Medicine, Baltimore, Md. 21205 U.S.A.

Neuroscience Letters
|July 17, 2009
PubMed
Summary

Researchers identified corticostriatal neurons in rat neocortex using retrograde axonal transport. These neurons are located throughout layer V, varying in size and shape, with larger pyramidal cells typically unlabeled.

Area of Science:

  • Neuroscience
  • Cell Biology

Background:

  • The corticostriatal pathway is crucial for motor control and reward processing.
  • Understanding the cellular composition of this pathway is essential for deciphering its function.

Purpose of the Study:

  • To identify and characterize corticostriatal neurons in the rat neocortex.
  • To determine the laminar distribution and morphological features of these neurons.

Main Methods:

  • Utilized the peroxidase retrograde axonal transport method for neuronal tracing.
  • Examined rat neocortical tissue to identify labeled neurons.

Main Results:

  • Corticostriatal neurons were found exclusively in layer V of the neocortex.
  • These neurons spanned the entire radial extent of layer V.

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  • Labeled neurons exhibited diverse sizes and shapes.
  • Typically, the largest pyramidal cells within layer V were not labeled.

    • Conclusions:

    • Layer V of the rat neocortex contains a heterogeneous population of corticostriatal neurons.
    • The retrograde transport method effectively labels a specific subset of these neurons, excluding larger pyramidal cells.