Anatomy and Structural Connectivity of the Opercula

Area of Science:

• Neuroanatomy
• Neuroscience
• Vascular Neurology

Background:

• The cerebral operculum, historically viewed as a simple anatomical cover, is now understood as a complex periSylvian region.
• It is embedded within extensive cortico-cortical and cortico-subcortical networks.

Purpose of the Study:

• To provide a comprehensive synthesis of opercular organization.
• To integrate topographic anatomy, structural connectivity, and vascular supply of the operculum.

Main Methods:

• Review of topographic anatomy, defining opercular subregions by periSylvian sulcal landmarks.
• Analysis of structural connectivity, including major white matter tracts and operculum-specific pathways.
• Description of vascular supply, focusing on the middle cerebral artery's branches to the opercular region.

Main Results:

• The operculum is topographically organized into frontal, rolandic, parietal, and temporal subregions.
• It serves as a critical hub in language, auditory, visual, and gustatory networks, supporting multimodal integration.
• The middle cerebral artery primarily vascularizes the operculum, supplying both superficial and deep layers.

Conclusions:

• The operculum's complex morphology, dense connectivity, and vascularization underpin its functional significance.
• These structural features help explain the clinical heterogeneity observed in opercular epilepsy, impacting diagnosis and surgical management.