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Morphological patterns of the collateral sulcus in the human brain
Sonja C Huntgeburth1, Michael Petrides
1Cognitive Neuroscience Unit, Montreal Neurological Institute, McGill University, 3801 University Street, Montreal, Quebec, Canada H3A 2B4. sonja.huntgeburth@mail.mcgill.ca
The European Journal of Neuroscience
|April 20, 2012
Summary
The collateral sulcal complex is not a single continuous sulcus but comprises three distinct segments: the rhinal sulcus, collateral sulcus proper, and occipital collateral sulcus. This finding aids in precise neuroimaging analysis.
Area of Science:
- Neuroanatomy
- Brain Morphology
- Human Neuroscience
Background:
- The collateral sulcal complex is a key landmark on the medial temporal lobe.
- Its anterior and posterior extents delineate functionally distinct cortical regions.
Purpose of the Study:
- To investigate the morphological continuity of the collateral sulcal complex.
- To determine if the collateral sulcus is a single continuous structure or composed of separate segments.
Main Methods:
- Magnetic Resonance Imaging (MRI) was used to examine the three-dimensional morphology of the collateral sulcal complex.
- Analysis focused on identifying distinct sulcal segments and their relationships.
Main Results:
- The collateral sulcal complex consists of three separate segments: the anterior rhinal sulcus, the middle collateral sulcus proper, and the caudal occipital collateral sulcus.
- While appearing continuous on the surface, the collateral sulcus proper and occipital collateral sulcus are separable in their depths.
- Quantification of segment location and variability in stereotaxic space was provided.
Conclusions:
- The collateral sulcal complex is composed of three distinct anatomical segments, not a single continuous sulcus.
- These findings are crucial for accurate identification of functional activation peaks in neuroimaging studies.
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