Given the following clinical observation, identify the specific anatomical feature that is underdeveloped and explain your reasoning.

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Sulci (singular: sulcus) are the distinctive grooves or depressions found on the uneven exterior surface of the cerebral cortex, situated between the raised folds or bumps.

Sulci

The longitudinal fissure is the deep, prominent groove that runs directly through the center of the brain's exterior surface. It visibly separates the brain into two distinct halves, known as the left and right hemispheres, amidst the surrounding ridges and depressions of the cerebral cortex.

Longitudinal Fissure

The complex pattern of folds (gyri) and grooves (sulci) on the cerebral cortex form crucial anatomical landmarks. These distinctive features allow for the reliable separation of the brain into various functional centers.

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