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Anatomic relationship between the anterior sylvian point and the pars triangularis
Giyas Ayberk1, O Emre Yagli, Ayhan Comert
1Second Department of Neurosurgery, Ataturk Training and Research Hospital, Bilkent/Ankara, Turkey. giyas67@hotmail.com
Clinical Anatomy (New York, N.Y.)
|April 11, 2012
Summary
This study reveals three distinct morphological shapes (V, U, Y) of the pars triangularis in the human brain. Understanding these variations in the inferior frontal gyrus is crucial for neurosurgical procedures.
Area of Science:
- Neuroanatomy
- Surgical Anatomy
- Morphology
Background:
- The pars triangularis, a region of the inferior frontal gyrus, exhibits variations impacting surgical approaches.
- Precise anatomical landmarks, such as the anterior sylvian point, are vital for minimally invasive intracranial procedures.
Purpose of the Study:
- To delineate the morphological variations of the pars triangularis.
- To provide an enhanced description of the anterior sylvian point and its anatomical relationships.
Main Methods:
- Dissection of 36 adult human hemispheres.
- Measurement of key landmarks including the sylvian fissure segments and distances to adjacent sulci.
- Analysis of the branching patterns of the anterior rami of the sylvian fissure.
Main Results:
- The pars triangularis was classified into three shapes: V, U, and Y, based on the merging patterns of its anterior rami.
- Shape distribution varied between hemispheres: Y-shaped (30.76% right, 50% left), U-shaped (20.3% right, 35.71% left), and V-shaped (40.61% right, 14.29% left).
- The relationship between the anterior sylvian point and surrounding vascular structures was examined.
Conclusions:
- Morphological variations in the pars triangularis are significant.
- Detailed knowledge of the sylvian fissure anatomy and pars triangularis shapes is essential for neurosurgical navigation and planning.
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