gyrusissa

Gyrusissa is a term that appears in some neuroanatomical discussions as a proposed cortical gyrus-like folding. It is not recognized as an established anatomical landmark in standard brain atlases, and its usage is limited to certain theoretical models, teaching materials, or speculative literature. In these contexts, gyrusissa serves as an example of how new names might be proposed for gyral variants that occur across individuals and species.

Morphology and location: Descriptions describe gyrusissa as a slender, elongated gyrus with a relatively gentle convex surface, located on the lateral surface of the hemisphere and bounded by adjacent sulci. Exact position varies, and there is no single universally accepted atlas delineating its borders.

Function and significance: No consensus exists regarding a specific function for gyrusissa. Because it is not consistently identified, proposed functional associations are speculative and used primarily for educational illustration of gyral naming conventions and anatomical diversity.

History and usage: The term is largely informal and not part of canonical nomenclature such as Terminologia Anatomica. When encountered, readers should verify the source to determine whether gyrusissa refers to a hypothetical construct, a described variant, or an error.

See also: Related topics include gyrus, sulcus, cerebral cortex, and gyrification.