Inferior parietal lobule
It is divided from rostral to caudal into two gyri: In males, the inferior parietal lobule is significantly more voluminous in the left hemisphere compared to the right.[3] Inferior parietal lobule has been involved in the perception of emotions in facial stimuli,[4] and interpretation of sensory information.[5] Destruction to the inferior parietal lobule of the dominant hemisphere results in Gerstmann's syndrome: left–right confusion, finger agnosia, dysgraphia and dyslexia, dyscalculia, contralateral hemianopia, or lower quadrantanopia.Functional imaging experiments suggest that the left anterior supramarginal gyrus (aSMG) of the human inferior parietal lobule exhibits an evolved specialization related to tool use.The habitual use of tools by chimpanzees makes the uniqueness of the human aSMG an open question as its function may have evolved prior to the split from our last common ancestor.