A factor analysis of the human's corpus callosum
V H Denenberg1, A Kertesz, P E Cowell
1Biobehavioral Sciences Graduate Degree Program, University of Connecticut, Storrs 06269-4154.
Brain Research
|May 10, 1991
Summary
Human corpus callosum (CC) morphology varies by sex and handedness. This study identified regional CC width differences, particularly in the anterior body and posterior body, influenced by sex and handedness consistency.
Area of Science:
- Neuroanatomy
- Human Morphology
- Neuroscience
Background:
- The corpus callosum (CC) is the largest white matter tract connecting the brain hemispheres.
- Understanding CC morphology is crucial for insights into brain structure and function.
- Previous studies have explored CC variations, but detailed regional analysis considering sex and handedness interactions is ongoing.
Purpose of the Study:
- To develop and utilize a computer program for precise midsagittal measurement of the human corpus callosum.
- To investigate regional variations in corpus callosum width based on sex and handedness.
- To determine if handedness consistency influences corpus callosum morphology.
Main Methods:
- A computer program was developed to measure midsagittal sections of the human corpus callosum.
- Factor analysis was applied to callosal area, perimeter, axis length, and 99 width measurements from 104 subjects.
- Regional widths were analyzed for sex x handedness interactions and compared between consistent and non-consistent right-handed individuals.
Main Results:
- Seven distinct width factors of the corpus callosum were identified.
- Significant sex x handedness interactions were observed in the anterior body, with larger callosa in right-handed females and left-handed males.
- Males exhibited wider callosa than females in the posterior body. Non-consistent right-handed males had larger callosa than consistent right-handed males and both female groups in the isthmus region.
Conclusions:
- Regional corpus callosum widths are sensitive to interactions between sex and handedness.
- Consistency of handedness is a significant factor influencing human corpus callosum morphology.
- These findings contribute to a more nuanced understanding of brain structural variations.
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