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Association Areas of the Cortex

Association Areas of the Cortex

Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...

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Serial Two-Photon Tomography of the Whole Marmoset Brain for Neuroanatomical Analyses

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Cortical chemoarchitecture shapes macroscale effective functional connectivity patterns in macaque cerebral cortex.

Elise Turk¹, Lianne H Scholtens¹, Martijn P van den Heuvel¹

¹Brain Center Rudolf Magnus, Department of Psychiatry, University Medical Center Utrecht, Utrecht, The Netherlands.

Human Brain Mapping

|March 13, 2016

Summary

The microscale organization of neurotransmitter receptors in the mammalian brain influences large-scale functional connectivity. Receptor density ratios predict the strength of connections between cortical areas, impacting neural processing.

Keywords:

brain networks functional connectivity graph theory neurotransmitter receptors strychnine

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Area of Science:

Neuroscience
Computational Neuroscience
Neuroanatomy

Background:

The mammalian cortex integrates information through local and global neural processing.
Understanding how microscale neurotransmitter receptor organization affects macroscale functional connectivity is crucial but poorly understood.

Purpose of the Study:

To investigate the relationship between regional neurotransmitter receptor density and macroscale functional connectivity in the macaque cortex.
To determine if microscale chemoarchitecture influences large-scale region-to-region neural interactions.

Main Methods:

Examined effective functional connectivity using strychnine administration to alter cortical chemical balance.
Correlated macroscale functional connectivity data with microscale neurotransmitter receptor density levels in the macaque cortex.

Main Results:

Macroscale patterns of effective corticocortical functional interactions are linked to regional neurotransmitter receptor density ratios.
The strength of efferent macroscale pathways correlates with the balance of excitatory and inhibitory neurotransmitter receptors.

Conclusions:

Microscale chemoarchitecture directly influences the emergence of macroscale functional connectivity patterns.
Neurotransmitter receptor organization at the microscale is a key determinant of large-scale brain network organization.