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Related Experiment Video

Updated: May 14, 2026

In vivo Imaging of Deep Cortical Layers using a Microprism

In vivo Imaging of Deep Cortical Layers using a Microprism

Published on: August 27, 2009

Layer-specific diffusion weighted imaging in human primary visual cortex in vitro.

Michiel Kleinnijenhuis¹, Valerio Zerbi, Benno Küsters

¹Department of Anatomy, Radboud University Nijmegen Medical Centre, Nijmegen, Netherlands; Radboud University Nijmegen, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, Netherlands.

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior

|January 26, 2013

Summary

This summary is machine-generated.

This study visualizes the human neocortex

Keywords:

Cortical anisotropy Diffusion weighted imaging Layer-specific Primary visual cortex Stria of Gennari

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Area of Science:

Neuroimaging
Neuroanatomy
Diffusion MRI

Background:

The human neocortex exhibits a distinct laminated structure, first observed by Francesco Gennari.
The stria of Gennari, a prominent feature in the primary visual cortex, has been historically studied using cytoarchitecture and magnetic resonance microscopy.
Understanding cortical layer-specific diffusion properties is crucial for advanced neuroimaging applications.

Purpose of the Study:

To demonstrate the feasibility of visualizing the human neocortex's layered structure using ex vivo diffusion weighted imaging (DWI).
To characterize the diffusion properties within specific cortical layers, including the stria of Gennari.
To explore potential applications of layer-specific diffusion imaging in clinical and research settings.

Main Methods:

High-resolution ex vivo diffusion weighted imaging (DWI) was performed on human primary visual cortex samples.
An ultra-high field (11.7 T) small-animal MR system was utilized to achieve necessary spatial and angular resolution.
Diffusion properties, including fractional anisotropy and orientation density functions, were analyzed across cortical depth.

Main Results:

The study successfully visualized the layered structure of the human neocortex using ex vivo DWI.
Fractional anisotropy varied with cortical depth, with reduced values observed in the stria of Gennari, inner band of Baillarger, and deepest cortical layer.
Orientation density functions revealed multiple diffusion components in the stria of Gennari and deeper cortical layers.

Conclusions:

Ex vivo diffusion weighted imaging (DWI) can effectively visualize the layered structure of the human neocortex.
Cortical layers exhibit distinct diffusion properties, particularly the stria of Gennari and deeper layers.
Future in vivo high-resolution DWI studies should consider cortical layer-specificity for enhanced characterization and applications like tractography.